IEC 60730-2-5:2013
(Main)Automatic electrical controls - Part 2-5: Particular requirements for automatic electrical burner control systems
Automatic electrical controls - Part 2-5: Particular requirements for automatic electrical burner control systems
IEC 60730-2-5:2013 applies to automatic electrical burner control systems for the automatic control of burners for oil, gas, coal or other combustibles for household and similar use including heating, air conditioning and similar use. This part 2-5 is applicable to a complete burner control system and to a separate programming unit. This part 2-5 is also applicable to a separate electronic high-voltage ignition source and to a separate flame detector. Separate ignition devices (electrodes, pilot burners, etc.) are not covered by this part 2-5 unless they are submitted as part of a burner control system. Requirements for separate ignition transformers are contained in IEC 60989. Systems utilizing thermoelectric flame supervision are not covered by this part 2-5. This part 2-5 applies to the inherent safety, to the manufacturer's declared operating values, operating times and operating sequences where such are associated with burner safety and to the testing of automatic electrical burner control systems used in, on, or in association with, burners. It was established on the basis of the fourth edition (2010) of that publication. Consideration may be given to future editions of, or amendments to, IEC 60730-1. The title of IEC 60730-2-5 Ed4.0 has been updated to the title of IEC 60730-1 Ed5.0. However, IEC 60730-2-5 Ed4.0 has not been updated in accordance with the technical requirements in IEC 60730-1 Ed5.0. This part 2-5 supplements or modifies the corresponding clauses in IEC 60730-1 so as to convert that publication into the IEC standard: Safety requirements for automatic electrical burner control systems. Key words: Automatic control, Burner control
This publication is to be read in conjunction with IEC 60730-1:2013.
The contents of the corrigendum of October 2023 have been included in this copy.
Dispositifs de commande électrique automatiques - Partie 2-5: Exigences particulières pour les systèmes de commande électrique automatiques des brûleurs
La IEC 60730-2-5:2013 s'applique aux systèmes de commande électrique automatiques de brûleurs pour la commande automatique de brûleurs pour fioul, gaz, charbon ou autres combustibles à usage domestique et analogue, y compris le chauffage, la climatisation et usages analogues. La présente partie 2-5 est applicable à un système complet de commande de brûleur et à une unité de programmation séparée. La présente partie 2-5 est également applicable à une source électronique d'allumage à haute tension séparée et à un détecteur de flamme séparé. Des dispositifs d'allumage séparés (électrodes, veilleuses de brûleur, etc.) ne sont pas couverts par la présente partie 2-5, à moins d'y être soumis en tant que partie d'un système de commande de brûleur. Les exigences pour les transformateurs séparés d'allumage sont traitées dans la CEI 60989. Les systèmes utilisant le contrôle thermoélectrique de flamme ne sont pas couverts par la présente partie 2-5. La présente partie 2-5 s'applique à la sécurité intrinsèque, aux valeurs de fonctionnement, aux temps de fonctionnement et aux séquences de fonctionnement déclarés par le fabricant, dans la mesure où ils interviennent dans la sécurité du brûleur, ainsi qu'aux essais des systèmes de commande électrique automatiques de brûleurs utilisés dans, sur, ou avec des brûleurs. Elle a été établie sur la base de la quatrième édition (2010) de cette publication. Les éditions futures de la CEI 60730-1, ou ses amendements, pourront être pris en considération. Le titre de la CEI 60730-2-5 Ed4.0 a été mis à jour en fonction du titre de la CEI 60730-1 Ed5.0. Cependant, la CEI 60730-2-5 Ed4.0 n'a pas été mise à jour conformément aux exigences techniques de la CEI 60730-1 Ed5.0. La présente partie 2-5 complète ou modifie les articles correspondants de la CEI 60730-1 de façon à la transformer en norme CEI: Exigences de sécurité pour les systèmes de commande électrique automatiques des brûleurs. Mots-clés: commande automatique, commande de brûleur
Cette publication doit être lue conjointement avec la CEI 60730-1:2013.
Le contenu du corrigendum d'octobre 2023 a été pris en considération dans cet exemplaire.
General Information
Relations
Overview
IEC 60730-2-5:2013 (Edition 4.1) - part of the IEC 60730 series - defines safety and testing requirements for automatic electrical burner control systems used with burners for oil, gas, coal or other combustibles for household and similar use (heating, air conditioning, boilers, furnaces). This particular standard supplements IEC 60730-1 and applies to complete burner control systems and separate units such as programming units, electronic high-voltage ignition sources and separate flame detectors. It addresses inherent safety, declared operating values, operating times and sequences where these affect burner safety. The consolidated version includes Amendment 1 and the October 2023 corrigendum.
Key Topics and Requirements
The standard focuses on safety, reliability and interoperability of burner control systems and covers technical areas including:
- Scope and definitions specific to burner control systems (including exclusions such as thermoelectric flame supervision and standalone ignition devices unless supplied as part of a system).
- Functional safety: manufacturer-declared operating values, operating times and sequences related to burner safety.
- Construction and materials: requirements for terminals, enclosures, threaded parts and resistance to heat, corrosion, moisture and dust.
- Electrical safety: protection against electric shock, insulation, electric strength, protective earthing and terminal integrity.
- Electronic controls: normative Annex H for electronic control requirements and Annex J for systems using NTC/PTC thermistors.
- EMC and immunity: emission and immunity testing to ensure operation in typical electrical environments.
- Durability and testing: endurance, mechanical strength, manufacturing deviation, drift and abnormal operation tests.
- Flame detection and ignition: requirements for separate flame detectors and electronic high-voltage ignition sources (note: separate ignition transformers are covered by IEC 60989).
Applications and Intended Users
IEC 60730-2-5 is used by:
- Manufacturers of burner control modules, flame detectors and ignition units designing to international safety requirements.
- Appliance OEMs integrating burner controls into boilers, furnaces, water heaters, HVAC and similar household/commercial equipment.
- Test laboratories and certification bodies performing compliance testing and conformity assessment.
- Design and safety engineers responsible for product safety documentation, declared operating sequences and failure-mode testing.
- Regulators and standards committees harmonizing national requirements.
Practical applications include design validation, type-testing, product certification, and specification of control behavior for safe burner start-up, supervision and shut-down sequences.
Related Standards
- IEC 60730-1:2013 - General requirements for automatic electrical controls (to be read alongside IEC 60730-2-5).
- IEC 60989 - Requirements for separate ignition transformers.
- IEC 61058-1 - Manual switch requirements when not part of automatic controls.
Keywords: IEC 60730-2-5:2013, automatic electrical burner control systems, automatic control, burner control, flame detector, ignition source, burner safety.
Standards Content (Sample)
IEC 60730-2-5 ®
Edition 4.1 2017-08
CONSOLIDATED VERSION
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Automatic electrical controls –
Part 2-5: Particular requirements for automatic electrical burner control systems
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IEC 60730-2-5 ®
Edition 4.1 2017-08
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Automatic electrical controls –
Part 2-5: Particular requirements for automatic electrical burner control systems
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 97.120 ISBN 978-2-8322-8583-1
IEC 60730-2-5 ®
Edition 4.1 2017-08
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Automatic electrical controls –
Part 2-5: Particular requirements for automatic electrical burner control systems
– 2 – IEC 60730-2-5:2013+AMD1:2017 CSV
© IEC 2017
CONTENTS
FOREWORD . 4
1 Scope and normative references . 7
2 Terms and definitions . 9
3 General requirements . 17
4 General notes on tests . 17
5 Rating . 18
6 Classification . 18
7 Information . 19
8 Protection against electric shock . 23
9 Provision for protective earthing . 23
10 Terminals and terminations . 23
11 Constructional requirements . 24
12 Moisture and dust resistance . 31
13 Electric strength and insulation resistance . 31
14 Heating. 32
15 Manufacturing deviation and drift . 33
16 Environmental stress . 34
17 Endurance . 34
18 Mechanical strength . 37
19 Threaded parts and connections . 38
20 Creepage distances, clearances and distances through solid insulation. 38
21 Resistance to heat, fire and tracking . 38
22 Resistance to corrosion . 38
23 Electromagnetic compatibility (EMC) requirements – Emission . 38
24 Components . 38
25 Normal operation . 38
26 Electromagnetic compatibility (EMC) requirements – Immunity . 38
27 Abnormal operation . 38
28 Guidance on the use of electronic disconnection . 39
Annex H (normative) Requirements for electronic controls . 40
Annex J (normative) Requirements for thermistor elements and controls using
thermistors . 58
Annex BBAA (informative) Functional characteristics of burner control systems to be
specified by the relevant appliance standards, as applicable . 59
Annex BB (informative) Specific regional requirements in Japan . 60
Bibliography . 62
Figure 101 – Pulse spark generation . 23
Figure H.101 – Voltage variation test . 44
© IEC 2017
Table 1 (7.2 of the previous edition 3) – Required information and methods
of providing information (1 of 2) . 21
Table H.1 (7.2 of the previous edition) . 41
Table H.101 – Timing of short-term supply voltage variations . 44
Table H.103 – Peak voltages . 49
Table H.103 – Test levels for electrostatic discharge . 50
Table BBAA.1 – Functional characteristics of burner control systems to be specified
by the relevant appliance standards, as applicable . 59
Table BB.1 – Comparison between JIS and adopted international standard . 61
– 4 – IEC 60730-2-5:2013+AMD1:2017 CSV
© IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AUTOMATIC ELECTRICAL CONTROLS –
Part 2-5: Particular requirements for automatic
electrical burner control systems
FOREWORD
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This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 60730-2-5 edition 4.1 contains the fourth edition (2013-11) [documents 72/922/FDIS
and 72/929/RVD] and its amendment 1 (2017-08) [documents 72/1084/FDIS and
72/1103/RVD].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendment 1. Additions are in green text, deletions are in strikethrough
red text. A separate Final version with all changes accepted is available in this
publication.
© IEC 2017
International Standard IEC 60730-2-5 has been prepared by IEC technical committee 72:
Automatic electrical controls.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part 2-5 is intended to be used in conjunction with IEC 60730-1. It was established on
the basis of the fourth edition (2010) of that publication. Consideration may be given to future
editions of, or amendments to, IEC 60730-1.
The title of IEC 60730-2-5 Ed. 4 has been updated to the title of IEC 60730-1 Ed. 5.0.
However, IEC 60730-2-5 Ed. 4.0 has not been updated in accordance with the technical
requirements in IEC 60730-1 Ed. 5.0.
This part 2-5 supplements or modifies the corresponding clauses in IEC 60730-1 so as to
convert that publication into the IEC standard: Safety requirements for automatic electrical
burner control systems.
Where this part 2-5 states "addition", "modification", or "replacement", the relevant
requirement, test specification or explanatory matter in Part 1 should be adapted accordingly.
Where no change is necessary, this part 2-5 indicates that the relevant clause or subclause
applies.
In the development of a fully international standard, it has been necessary to take into
consideration the differing requirements resulting from practical experience in various parts of
the world and to recognize the variation in national electrical systems and wiring rules.
The “in some countries” notes regarding differing national practices are contained in the following subclauses:
– 2.3.127
– 6.11
– 15.7
– 17.16.102.1
– H.26.11.103
– Table H.21, Note 7
In this publication:
1) The following print types are used:
– Requirements proper: in roman type;
– Test specifications: in italic type;
– Explanatory matter; in small roman type;
– Words defined in Clause 2: bold.
2) Subclauses, notes, tables and figures which are additional to those in Part 1 are
numbered starting from 101, additional annexes are lettered AA, BB, etc.
A list of all parts of the IEC 60730 series, under the general title Automatic electrical controls
can be found on the IEC website.
– 6 – IEC 60730-2-5:2013+AMD1:2017 CSV
© IEC 2017
The committee has decided that the contents of the base publication and its amendment will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
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colour printer.
The contents of the corrigendum 1 (2023-10) have been included in this copy.
© IEC 2017
AUTOMATIC ELECTRICAL CONTROLS –
Part 2-5: Particular requirements for automatic
electrical burner control systems
1 Scope and normative references
This clause of Part 1 is applicable except as follows:
1.1 Scope
Replacement:
This part of IEC 60730 applies to automatic electrical burner control systems for the
automatic control of burners for oil, gas, coal or other combustibles for household and
similar use including heating, air conditioning and similar use.
This part 2-5 is applicable to a complete burner control system and to a separate
programming unit. This part 2-5 is also applicable to a separate electronic high-voltage
ignition source and to a separate flame detector.
NOTE Separate ignition devices (electrodes, pilot burners, etc.) are not covered by this part 2-5 unless they are
submitted as part of a burner control system. Requirements for separate ignition transformers are contained in
IEC 60989.
Throughout this part 2-5, where it can be used unambiguously, the word "system" means
"burner control system" and "systems" means "burner control systems".
Systems utilizing thermoelectric flame supervision are not covered by this part 2-5.
1.1.1 This part 2-5 applies to the inherent safety, to the manufacturer's declared operating
values, operating times and operating sequences where such are associated with burner
safety and to the testing of automatic electrical burner control systems used in, on, or in
association with, burners.
NOTE Requirements for specific operating values, operating times and operating sequences are given in the
standards for appliances and equipment.
Systems for equipment not intended for normal household use, but which nevertheless may
be used by the public, such as equipment intended to be used by laymen in shops, in light
industry and on farms, are within the scope of this part 2-5.
This part 2-5 applies to systems using NTC or PTC thermistors, additional requirements for
which are contained in Annex J.
This part 2-5 does not apply to systems designed exclusively for industrial applications.
1.1.2 This part 2-5 applies to manual controls when such are electrically and/or
mechanically integral with automatic controls.
NOTE Requirements for manual switches not forming part of an automatic control are contained in IEC 61058-1.
Throughout this part 2-5, the word "equipment" means "appliance and equipment".
– 8 – IEC 60730-2-5:2013+AMD1:2017 CSV
© IEC 2017
This part of IEC 60730 applies to automatic electrical burner control systems for the
automatic control of burners for oil, gas, coal or other combustibles intended to be used
• for household and similar use,
• in shops, offices, hospitals, farms and commercial and industrial applications.
This International Standard is applicable
• to a complete burner control system,
• to a separate programming unit,
• to a separate electronic high-voltage ignition source,
• to a separate flame detector and
• to a separate high-temperature operation (HTO) detector.
NOTE 1 Throughout this document, where it can be used unambiguously, the word "system" means "burner
control system" and "systems" means "burner control systems".
NOTE 2 Throughout this document, the word "equipment" means "appliance and equipment."
This standard does not apply to thermoelectric flame supervision controls; thermoelectric
flame supervision controls are covered by ISO 23551-6.
This document also applies to electrical burner control systems intended exclusively for
industrial process applications e.g. those applications covered by ISO TC 244 (ISO 13577).
1.1.1 This document applies to the inherent safety, to the declared operating values,
operating times and operating sequences where such are associated with burner safety
and to the testing of automatic electrical burner control systems used in, on, or in
association with, burners.
NOTE Requirements for specific operating values, operating times and operating sequences are given in the
standards for appliances and equipment.
1.1.2 This document applies to AC or DC powered systems with a rated voltage not
exceeding 660 V AC or 600 V DC.
1.1.3 This document does not take into account the response value of an automatic action
of a control, if such a response value is dependent upon the method of mounting the
control in the equipment. Where a response value is of significant purpose for the protection
of the user, or surroundings, the value defined in the appropriate equipment standard or as
determined by the manufacturer applies.
1.1.4 This document applies also to systems incorporating electronic devices, requirements
for which are contained in Annex H.
1.1.5 This document applies to systems using NTC or PTC thermistors, additional
requirements for which are contained in Annex J.
1.1.6 This document includes systems responsive to flame properties and temperature for
HTO.
1.2 Replacement:
This part 2-5 applies to systems with a rated voltage not exceeding 660 V and with a rated
current not exceeding 63 A.
1.3 Replacement:
© IEC 2017
This part 2-5 does not take into account the response value of an automatic action of a
control, if such a response value is dependent upon the method of mounting the control in
the equipment. Where a response value is of significant purpose for the protection of the
user, or surroundings, the value defined in the appropriate household equipment standard or
as determined by the manufacturer applies.
NOTE This part 2-5 includes systems responsive to flame properties.
1.4 Replacement:
This part 2-5 applies also to systems incorporating electronic devices, requirements for
which are contained in Annex H.
1.51.2 Normative references
This clause of Part 1 is applicable except as follows:
Addition:
IEC 60068-2-6, Environmental testing – Part 2: Tests – Test Fc: Vibration (sinusoidal)
IEC 60079-20-1:2010, Explosive atmospheres – Part 20-1: Material characteristics for gas
and vapour classification – Test methods and data
IEC 61643-11, Low-voltage surge protective devices – Part 11: Surge protective devices
connected to low-voltage power systems – Requirements and test methods
ISO 23551-6:2014, Safety and control devices for gas burners and gas-burning appliances –
Particular requirements – Part 6: Thermoelectric flame supervision controls
Replacement:
IEC 60127-1:2015, Miniature fuses – Part 1: Definitions for miniature fuses and general
requirements for miniature fuse-links
2 Terms and definitions
This clause of Part 1 is applicable except as follows:
2.2 Definitions of types of control according to purpose
NOTE Definition 2.2.23 is not applicable.
Additional definitions:
2.2.101
burner control system
system which includes a programming unit, a flame detector or, if applicable, an HTO
detector and may include an ignition source and/or ignition device and which monitors the
operation of fuel burners
Note 1 to entry: The various functions of the system may be in one or more housings.
2.2.102
flame detector
device which provides the programming unit with a signal indicating the presence or
absence of flame
– 10 – IEC 60730-2-5:2013+AMD1:2017 CSV
© IEC 2017
Note 1 to entry: It includes the flame sensor and may include an amplifier and a relay for signal transmission.
The amplifier and relay may be in its own housing or combined with the programming unit.
2.2.103
flame sensor
device which senses the flame and provides the input signal to the flame detector amplifier
Note 1 to entry: Examples are optical sensors and flame electrodes (flame rods).
2.2.104
ignition source
electrical or electronic system component which provides energy to an ignition device
Note 1 to entry: It may be separated from or incorporated in the programming unit. Examples are ignition
transformers and electronic high-voltage generators.
2.2.105
ignition device
device mounted on or adjacent to a burner for igniting fuel at the burner
Note 1 to entry: Examples are pilot burners, spark electrodes and hot surface igniters.
2.2.106
programming unit
device which controls the burner operation in a declared sequence from start-up to shut-
down within declared timings and in response to signals from regulating, limiting and
monitoring devices
2.2.107
multitry system
system that allows more than one valve open period during its declared operating
sequence
2.2.108
HTO detector
device which provides the programming unit with a signal indicating presence or absence of
HTO
Note 1 to entry: It includes the HTO-sensor and may include an amplifier and a relay for signal transmission.
The amplifier and relay may be in its own housing or combined with the programming unit.
2.2.109
HTO-sensor
device which senses the temperature of a surface or a medium within the combustion
chamber which is in direct contact with a flammable fuel-air mixture and provides a signal
indicating presence or absence of HTO
2.2.110
auto-ignition temperature
AIT
lowest temperature (of a hot surface or the environment) at which an ignition of a flammable
fuel/air mixture occurs
[SOURCE: IEC 60079-20-1:2010,3.3, modified : "or the environment" has been added in the
parenthesis, "at which under specified test conditions" has been deleted and " flammable gas
or vapour in mixture with air or air/inert gas" has been replaced by " flammable fuel/air
mixture"]
© IEC 2017
2.2.111
high-temperature operation
HTO
operation on the basis of auto-ignition temperature which assures ignition and burning of
fuel
Note 1 to entry: High-temperature operation is used e.g. in fuel cells (IEC 62282-3-100) and in industrial
furnaces and associated processing equipment (ISO 13577) where ignition and burning is detected by means of
sensing the temperature.
2.3 Definitions relating to the function of controls
2.3.30
T
max
Replace "switch head" by "burner control system."
2.3.32
safety shut-down
Replacement:
de-energization of the main fuel flow means as the result of the action of a limiter, a cut-out or
the detection of an internal fault of the system
Note 1 to entry: Safety shut-down may include additional actions by the system.
Additional definitions:
2.3.101
automatic recycle
automatic repetition of the start-up procedure, without manual intervention, following loss of
the supervised flame and subsequent fuel supply shutoff
2.3.102
controlled shut-down
de-energization of the fuel flow means as a result of the opening of a control loop by a control
device such as a thermostat leading the system to return to the start position
Note 1 to entry: Controlled shut-down may include additional actions by the system.
2.3.103
flame detector response time
period of time between the loss of the sensed flame and the signal indicating the absence of
flame
2.3.104
flame detector operating characteristics
that function of the flame detector which indicates absence or presence of flame as the
output signal of the flame detector relating to the input signal
Note 1 to entry: Normally the input signal is provided by a flame sensor.
2.3.104.1
signal for presence of flame
S
minimum signal which indicates the presence of flame when there was previously no flame
– 12 – IEC 60730-2-5:2013+AMD1:2017 CSV
© IEC 2017
2.3.104.2
signal for absence of flame
S
maximum signal which indicates the loss of flame
Note 1 to entry: S is less than S .
2 1
2.3.104.3
maximum flame signal
S
max
maximum signal which does not affect the timings or the sequence
2.3.104.4
signal for visible light flame simulation
S
minimum signal which indicates the presence of flame during the visible light flame
simulation test
Note 1 to entry: S is less than S .
3 2
2.3.105
self-checking flame detector
flame detector which checks for correct operation of the flame detector and its associated
electronic circuitry while the burner is in the running position
2.3.106
flame detector self-checking rate
frequency of the self-checking function of the flame detector (in number of operations per
unit of time)
2.3.107
flame failure lock-out time
flame failure response time
period of time between the signal indicating absence of flame and lock-out
2.3.108
flame failure re-ignition time
relight time
period of time between the signal indicating absence of flame and the signal to energize the
ignition device, during which the fuel supply is not shut off
2.3.109
flame signal
output signal of the flame detector
2.3.110
flame simulation
condition which occurs when the flame detector indicates the presence of flame when in
reality no flame is present
2.3.111
ignition time
period of time during which the ignition device is energized
2.3.112
lock-out
process in which the system goes into one of the following lock-out conditions, following
safety shut-down
© IEC 2017
2.3.112.1
non-volatile lock-out
condition such that a restart can only be accomplished by a manual reset of the system and
by no other cause
2.3.112.2
volatile lock-out
condition such that a restart can be accomplished by either a manual reset of the system or
by an interruption of the power supply and its subsequent restoration
2.3.113
main flame establishing period
period of time between the signal to energize the main fuel flow means and the signal
indicating presence of the main burner flame
2.3.114
pilot flame establishing period
period of time between the signal to energize the pilot fuel flow means and the signal
indicating presence of the pilot flame
2.3.115
post-ignition time
period of the ignition time between the signal indicating presence of flame and the signal to
de-energize the ignition device
2.3.116
pre-ignition time
period of the ignition time between the signal to ignite and the signal to energize the fuel
flow means
2.3.117
proved igniter
proved igniter system
system in which the fuel flow means is energized only after the availability of sufficient energy
to ignite the fuel has been verified
Note 1 to entry: Examples are systems using spark supervision and those using proved hot surface igniters.
2.3.117.1
proved igniter operating value
signal which indicates that the proved igniter has the energy to ignite the fuel
2.3.117.2
igniter proving time
period of time between the signal to energize the proved igniter and the signal to energize
the fuel flow means
2.3.117.3
igniter failure response time
period of time between loss of the supervised proved igniter and the signal to de-energize
the fuel flow means
2.3.118
purge time
period during which air is introduced to displace any remaining air/fuel mixtures or products of
combustion from the combustion zone and flue ways
Note 1 to entry: No fuel is admitted during this period.
– 14 – IEC 60730-2-5:2013+AMD1:2017 CSV
© IEC 2017
2.3.118.1
post-purge time
purge time that takes place immediately following the shutting off of the fuel supply
2.3.118.2
pre-purge time
purge time that takes place between initiation of a burner control sequence and the
admission of fuel to the burner
2.3.119
re-ignition
relight
process by which, following loss of the flame signal, the ignition device will be re-energized
without interruption of the fuel flow means
2.3.120
recycle time
period of time between the signal to de-energize the fuel flow means following the loss of
flame and the signal to begin a new start-up procedure
2.3.121
running position
position denoting that the main burner flame is established and supervised, or the burner is in
HTO and supervised
2.3.122 Void
safety shut-down
de-energization of the main fuel flow means as the result of the action of a limiter, a cut-out or
the detection of an internal fault of the system
Note 1 to entry: Safety shut-down may include additional actions by the system.
2.3.123
start position
position which denotes that the system is not in the lock-out condition and has not yet
received the start signal, but can proceed with the start-up sequence if required
2.3.124
start signal
signal, for example, from a thermostat, which releases the system from its start position
2.3.125
start-up lock-out time
period of time between the signal to energize the fuel flow means and lock-out
Note 1 to entry: For systems which control two separate fuel flow means, two different start-up lock-out times
are possible (first and second start-up lock-out times).
2.3.126
waiting time
period between the start signal and the signal to energize the ignition device
Note 1 to entry: For burners without fans, natural ventilation of the combustion chamber and the flue passages
normally takes place during this time.
© IEC 2017
2.3.127
valve open period
for multitry systems, the period of time between the signal to energize the fuel flow means,
and the signal to de-energize the fuel flow means, if proof of the supervised burner flame is
not established
Note 1 to entry: In the USA, this period is referred to as the "trial-for-ignition period."
2.3.128
valve sequence period
for multitry systems, the sum of all valve opening periods prior to lock-out, if proof of the
supervised burner flame is not established
2.3.129
system restart
process by which, after a safety shut-down, a full start-up procedure is automatically
repeated
2.3.130
reset from lock-out function
function that provides reset from lock-out allowing the system to attempt a restart
Note 1 to entry: The reset function may be performed by various electric/electronic (mobile) devices.
2.3.131
common cause failures
failures of different items, resulting from a single event, where these failures are not
consequences of each other
Note 1 to entry: Common cause failures should not be confused with common mode failures.
[SOURCE: IEC 60050-191:1990,191-04-23]
2.3.132
HTO detector response time
period of time between the temperature falling below the defined temperature limit for HTO
and the signal indicating the absence of HTO
2.3.133
HTO detector operating characteristics
that function of the HTO detector which indicates absence or presence of HTO as the output
signal of the HTO detector relating to the input signal
Note 1 to entry: Normally the input signal is provided by a HTO-sensor.
2.3.134
HTO response time
period of time between the signal indicating absence of HTO and proceeding to safety shut-
down or to switch over to flame supervision
2.3.135
HTO signal
output signal of the HTO detector
2.5 Definitions of types of control according to construction
Additional definitions:
– 16 – IEC 60730-2-5:2013+AMD1:2017 CSV
© IEC 2017
2.5.101
system for permanent operation
system which is intended to remain in the running position for longer than 24 h without
interruption
2.5.102
system for non-permanent operation
system which is intended to remain in the running position for less than 24 h
Additional definitions:
2.101 Definitions relating to the type of burner (see 6.101)
2.101.1
continuous ignition
type of ignition which, once placed in operation, is intended to remain energized continuously
until it is manually interrupted
2.101.2
continuous pilot
pilot which, once placed in operation, is intended to remain ignited continuously until it is
manually interrupted
2.101.3
direct ignition
type of ignition which is applied directly to the main burner, without the use of a pilot
2.101.4
expanding pilot
form of continuous pilot where the pilot flame is increased or expanded when required to
ignite the main burner and reduced either immediately after main burner ignition, or after the
main flame is shut off
2.101.5
full rate start
condition in which the main burner ignition and subsequent flame supervision occur at full
fuel rate
2.101.6
intermittent ignition
type of ignition which is energized when an appliance is called on to operate and which
remains continuously energized during each period of main burner operation and where the
ignition is de-energized when the main burner operating cycle is completed
2.101.7
intermittent pilot
pilot which is automatically ignited when an appliance is called on to operate and which
remains continuously ignited during each period of main burner operation and where the
pilot is automatically extinguished when each main burner operating cycle is completed
2.101.8
interrupted ignition
type of ignition which is energized prior to the admission of fuel to the main burner and which
is de-energized when the main flame is established
© IEC 2017
2.101.9
interrupted pilot
pilot which is automatically ignited prior to the admission of fuel to the main burner and which
is automatically extinguished when the main flame is established
2.101.10
low rate start
condition in which main burner ignition occurs at low fuel rate
Note 1 to entry: Once ignition at low fuel rate occurs and the flame is proved, full main burner fuel rate may be
admitted.
2.101.11
pilot
flame, smaller than the main flame, which is utilized to ignite the main burner or burners
3 General requirements
This clause of Part 1 is applicable.
4 General notes on tests
This clause of Part 1 is applicable except as follows:
4.1 Conditions of test
4.1.1 Replacement:
Unless otherwise specified, the system and each system component are tested as delivered,
having been mounted as declared in Table 1 (7.2 of the previous edition), requirement 31, in
the most unfavourable position when there is more than one position.
When a separate system component is submitted, the manufacturer shall provide those other
system components which may be necessary to perform the relevant tests.
4.1.7 Not applicable.
4.2 Samples required
4.2.1 Replacement:
Unless otherwise specified, one sample shall be used for the tests of Clauses 5 to 14
inclusive. A different sample(s) shall be used for the tests of Clauses 15 to 17. At the option
of the manufacturer, the tests of Clauses 18 to 26 inclusive including the relevant annexes
may be conducted on a new sample or on the sample(s) used for the tests of Clauses 5 to 14
inclusive. The tests of Clause 27 shall be conducted on a new sample.
4.3 Instructions for test
4.3.2.1 Modification:
Delete "and those for a.c./d.c. at the more unfavourable supply."
4.3.2.4 Not applicable.
4.3.2.6 Replacement:
– 18 – IEC 60730-2-5:2013+AMD1:2017 CSV
© IEC 2017
For systems marked or declared for more than one rated voltage or rated current, the tests of
Clause 17 are made at the rated voltage and associated current (or vice versa) which
produces the most unfavourable combination.
5 Rating
This clause of Part 1 is applicable.
6 Classification
This clause of Part 1 is applicable except as follows:
6.1 According to nature of supply
6.1.1 Systems for a.c. only
Replace explanatory matter by the following requirement:
Systems intended for use on a.c. only supply shall only be used on a.c. supplies.
6.1.3 Not applicable.
6.3 According to their purpose
Additional subclauses:
6.3.101 – burner control system;
6.3.102 – flame detector;
6.3.103 – programming unit;
6.3.104 – ignition device;
6.3.105 – electronic high-voltage ignition source;
6.3.106 – flame sensor;
6.3.107 – HTO detector;
6.3.108 – HTO-sensor.
6.4 According to features of automatic action
6.4.1 Not applicable.
6.4.3 Addition:
Burner control systems are classified as having Type 2 action.
6.4.3.12 Not applicable.
Additional subclauses:
6.4.3.101 – non-volatile lock-out (Type 2.V);
6.4.3.102 – volatile lock-out (Type 2.W);
© IEC 2017
6.4.3.103 – non-permanent operation (Type 2.AC);
6.4.3.104 – permanent operation (Type 2.AD);
6.4.3.105 – spark supervision (Type 2.AE);
6.4.3.106 – air/pressure flow supervision (Type 2.AF);
6.4.3.107 – position-checked external devices (Type 2.AG);
6.4.3.108 – visible light flame simulation check (Type 2.AH);
6.4.3.109 – proved hot surface igniter (Type 2.AI).
6.7 According to ambient temperature limits of the switch head
6.7.1 Modification:
Replace "Control with a switch head" by "System and system components".
6.7.2 Modification:
Replace "Control with a switch head" by "System and system components".
6.10 According to number of cycles of actuation (M) of each manual action
6.10.5 to 6.10.7 Not applicable.
6.11 According to number of automatic cycles (A) of each automatic action
Addition:
NOTE In the countries members countries of CENELEC, the minimum value is 250 000 automatic cycles. In
Canada, China, in Japan and the USA, the minimum value is 100 000 cycles.
6.11.4 to 6.11.12 Not applicable.
6.15 According to construction
6.15.3 Not applicable.
6.16 Not applicable.
Additional subclauses:
6.101 According to type of burner
NOTE Classification could be according to burner operation (for example, forced draught) and type of fuel (for
example, gas). See 2.101.1 to 2.101.11.
6.102 According to type of pilot
6.103 According to type of ignition
6.104 According to starting fuel rate
7 Information
This clause of Part 1 is applicable except as follows:
– 20 – IEC 60730-2-5:2013+AMD1:2017 CSV
© IEC 2017
7.2.6 Replacement:
Except as indicated in 7.4, for integrated systems all information is provided by means of
declaration (X). For incorporated systems not declared under requirement 50, the marking
required is as indicated in Table 1 (7.2 of the previous edition). For incorporated systems
declared under requirement 50, the only marking required is the manufacturer's name or trade
mark and the unique type reference if other required marking is provided by documentation
(D).
NOTE See the explanation of documentation (D) contained in 7.2.1.
7.2.9 Modification:
Replace "T other than 55 °C" by "T other than 60 °C" in the line for symbol for
max max
"Ambient temperature limits of switch head".
© IEC 2017
Table 1 (7.2 of the previous edition 3) – Required information and methods
of providing information (1 of 2)
Information Clause or subclause Method
Modification:
Replace the following requirements by:
4 Nature of supply (a.c. or d.c.) 4.3.2, 6.1 C
6 Purpose of system or system component 4.3.5, 6.3 D
7b)
7 The type of load controlled by each circuit 14, 17.3.1, 6.2, H.27.1.2 D
8c)
15 Degree of protection provided by enclosure 6.5.1, 6.5.2, 11.5 D
17 Which of the terminals are suitable for the connection of external 6.6, 7.4.2, 7.4.3 D
conductors, and if they are suitable for line or neutral conductors,
or both
22 Temperature limits of the system and system components if T 6.7, 14.5, 14.7, 17.3 D
min
is lower than 0 °C, or T other than 60 °C
max
23 Temperature limits of mounting surfaces (T ) 6.12.2, 14.1, 17.3 D
s
101)
26 Number of cycles of actuation (M) for each manual action 6.10 X
28 Not applicable
5e)
31 Method of mounting the system and each s
...
IEC 60730-2-5 ®
Edition 4.0 2013-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Automatic electrical controls –
Part 2-5: Particular requirements for automatic electrical burner control systems
Dispositifs de commande électrique automatiques –
Partie 2-5: Exigences particulières pour les systèmes de commande électrique
automatiques des brûleurs
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IEC 60730-2-5 ®
Edition 4.0 2013-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Automatic electrical controls –
Part 2-5: Particular requirements for automatic electrical burner control systems
Dispositifs de commande électrique automatiques –
Partie 2-5: Exigences particulières pour les systèmes de commande électrique
automatiques des brûleurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XA
ICS 97.120 ISBN 978-2-8322-1171-7
– 2 – 60730-2-5 © IEC:2013
CONTENTS
FOREWORD . 4
1 Scope and normative references . 6
2 Definitions . 7
3 General requirements . 14
4 General notes on tests . 14
5 Rating . 15
6 Classification . 15
7 Information . 17
8 Protection against electric shock . 20
9 Provision for protective earthing . 20
10 Terminals and terminations . 20
11 Constructional requirements . 21
12 Moisture and dust resistance . 27
13 Electric strength and insulation resistance . 27
14 Heating . 28
15 Manufacturing deviation and drift . 29
16 Environmental stress . 30
17 Endurance . 31
18 Mechanical strength . 34
19 Threaded parts and connections . 34
20 Creepage distances, clearances and distances through solid insulation . 34
21 Resistance to heat, fire and tracking . 34
22 Resistance to corrosion . 34
23 Electromagnetic compatibility (EMC) requirements – emission. 34
24 Components . 34
25 Normal operation . 34
26 Electromagnetic compatibility (EMC) requirements – immunity . 34
27 Abnormal operation . 35
28 Guidance on the use of electronic disconnection . 35
Annex H (normative) Requirements for electronic controls . 36
Annex J (normative) Requirements for controls using thermistors . 49
Annex BB (informative) Functional characteristics of burner control systems to be
specified by the relevant appliance standards, as applicable . 50
Bibliography . 51
Figure 101 – Pulse spark generation . 20
Figure H.2 (H.26.5.4.2 of the previous version) – Voltage variation test . 39
Table 1 (7.2 of the previous edition) (1 of 2) . 18
Table H.1 (7.2 of the previous edition) . 36
Table H.101 – Voltage dips, short interruptions and voltage variations . 37
60730-2-5 © IEC:2013 – 3 –
Table H.13 (Table H.26.5.4.2 of the previous edition) – Timing of short-term supply
voltage variations . 38
Table H.102 – Test level for electrical fast transient burst . 41
Table H.103 – Peak voltages . 42
Table H.104 – Test levels for electrostatic discharge . 43
Table H.105 – Test levels for conducted disturbances on mains and I/O lines . 44
Table H.18 (Table H.26.12.3.1 of the previous edition) – Immunity to radiated
electromagnetic fields . 45
Table BB.1 – Functional characteristics of burner control systems to be specified by the
relevant appliance standards, as applicable . 50
– 4 – 60730-2-5 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AUTOMATIC ELECTRICAL CONTROLS –
Part 2-5: Particular requirements for automatic
electrical burner control systems
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60730-2-5 has been prepared by IEC technical committee 72:
Automatic electrical controls.
The text of this standard is based on the following documents:
FDIS Report on voting
72/922/FDIS 72/929/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
60730-2-5 © IEC:2013 – 5 –
This part 2-5 is intended to be used in conjunction with IEC 60730-1. It was established on the
basis of the fourth edition (2010) of that publication. Consideration may be given to future
editions of, or amendments to, IEC 60730-1.
The title of IEC 60730-2-5 Ed. 4 has been updated to the title of IEC 60730-1 Ed. 5.0. However,
IEC 60730-2-5 Ed. 4.0 has not been updated in accordance with the technical requirements in
IEC 60730-1 Ed. 5.0.
This part 2-5 supplements or modifies the corresponding clauses in IEC 60730-1 so as to
convert that publication into the IEC standard: Safety requirements for automatic electrical
burner control systems.
Where this part 2-5 states "addition", "modification", or "replacement", the relevant
requirement, test specification or explanatory matter in Part 1 should be adapted accordingly.
Where no change is necessary, this part 2-5 indicates that the relevant clause or subclause
applies.
In the development of a fully international standard, it has been necessary to take into
consideration the differing requirements resulting from practical experience in various parts of
the world and to recognize the variation in national electrical systems and wiring rules.
The “in some countries” notes regarding differing national practices are contained in the following subclauses:
– 2.3.127
– 6.11
– 15.7
– 17.16.102.1
– H.26.11.103
– Table H.21, Note 7
In this publication:
1) The following print types are used:
– Requirements proper: in roman type;
– Test specifications: in italic type;
– Explanatory matter; in small roman type;
– Words defined in Clause 2: bold.
2) Subclauses, notes, tables and figures which are additional to those in Part 1 are numbered
starting from 101, additional annexes are lettered AA, BB, etc.
A list of all parts of the IEC 60730 series, under the general title Automatic electrical controls
can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to
the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – 60730-2-5 © IEC:2013
AUTOMATIC ELECTRICAL CONTROLS –
Part 2-5: Particular requirements for automatic
electrical burner control systems
1 Scope and normative references
This clause of Part 1 is applicable except as follows:
1.1 Replacement:
This part of IEC 60730 applies to automatic electrical burner control systems for the automatic
control of burners for oil, gas, coal or other combustibles for household and similar use
including heating, air conditioning and similar use.
This part 2-5 is applicable to a complete burner control system and to a separate
programming unit. This part 2-5 is also applicable to a separate electronic high-voltage
ignition source and to a separate flame detector.
NOTE Separate ignition devices (electrodes, pilot burners, etc.) are not covered by this part 2-5 unless they are
submitted as part of a burner control system. Requirements for separate ignition transformers are contained in
IEC 60989.
Throughout this part 2-5, where it can be used unambiguously, the word "system" means
"burner control system" and "systems" means "burner control systems".
Systems utilizing thermoelectric flame supervision are not covered by this part 2-5.
1.1.1 This part 2-5 applies to the inherent safety, to the manufacturer's declared operating
values, operating times and operating sequences where such are associated with burner
safety and to the testing of automatic electrical burner control systems used in, on, or in
association with, burners.
NOTE Requirements for specific operating values, operating times and operating sequences are given in the
standards for appliances and equipment.
Systems for equipment not intended for normal household use, but which nevertheless may be
used by the public, such as equipment intended to be used by laymen in shops, in light industry
and on farms, are within the scope of this part 2-5.
This part 2-5 applies to systems using NTC or PTC thermistors, additional requirements for
which are contained in Annex J.
This part 2-5 does not apply to systems designed exclusively for industrial applications.
1.1.2 This part 2-5 applies to manual controls when such are electrically and/or mechanically
integral with automatic controls.
NOTE Requirements for manual switches not forming part of an automatic control are contained in IEC 61058-1.
Throughout this part 2-5, the word "equipment" means "appliance and equipment".
60730-2-5 © IEC:2013 – 7 –
1.2 Replacement:
This part 2-5 applies to systems with a rated voltage not exceeding 660 V and with a rated
current not exceeding 63 A.
1.3 Replacement:
This part 2-5 does not take into account the response value of an automatic action of a
control, if such a response value is dependent upon the method of mounting the control in the
equipment. Where a response value is of significant purpose for the protection of the user, or
surroundings, the value defined in the appropriate household equipment standard or as
determined by the manufacturer applies.
NOTE This part 2-5 includes systems responsive to flame properties.
1.4 Replacement:
This part 2-5 applies also to systems incorporating electronic devices, requirements for which
are contained in Annex H.
1.5 Normative references
This clause of Part 1 is applicable except as follows:
Addition:
IEC 60068-2-6, Environmental testing – Part 2: Tests – Test Fc: Vibration (sinusoidal)
IEC 61643-11, Low-voltage surge protective devices – Part 11: Surge protective devices
connected to low-voltage power systems – Requirements and test methods
2 Definitions
This clause of Part 1 is applicable except as follows:
2.2 Definitions of types of control according to purpose
Additional definitions:
2.2.101
burner control system
system which includes a programming unit, a flame detector and may include an ignition
source and/or ignition device and which monitors the operation of fuel burners
Note 1 to entry: The various functions of the system may be in one or more housings.
– 8 – 60730-2-5 © IEC:2013
2.2.102
flame detector
device which provides the programming unit with a signal indicating the presence or absence
of flame
Note 1 to entry: It includes the flame sensor and may include an amplifier and a relay for signal transmission. The
amplifier and relay may be in its own housing or combined with the programming unit.
2.2.103
flame sensor
device which senses the flame and provides the input signal to the flame detector amplifier
Note 1 to entry: Examples are optical sensors and flame electrodes (flame rods).
2.2.104
ignition source
electrical or electronic system component which provides energy to an ignition device
Note 1 to entry: It may be separated from or incorporated in the programming unit. Examples are ignition
transformers and electronic high-voltage generators.
2.2.105
ignition device
device mounted on or adjacent to a burner for igniting fuel at the burner
Note 1 to entry: Examples are pilot burners, spark electrodes and hot surface igniters.
2.2.106
programming unit
device which controls the burner operation in a declared sequence from start-up to shut-down
within declared timings and in response to signals from regulating, limiting and monitoring
devices
2.2.107
multitry system
system that allows more than one valve open period during its declared operating sequence
2.3 Definitions relating to the function of controls
2.3.30
T
max
Replace "switch head" by "burner control system."
Additional definitions:
2.3.101
automatic recycle
automatic repetition of the start-up procedure, without manual intervention, following loss of the
supervised flame and subsequent fuel supply shutoff
2.3.102
controlled shut-down
de-energization of the fuel flow means as a result of the opening of a control loop by a control
device such as a thermostat leading the system to return to the start position
Note 1 to entry: Controlled shut-down may include additional actions by the system.
60730-2-5 © IEC:2013 – 9 –
2.3.103
flame detector response time
period of time between the loss of the sensed flame and the signal indicating the absence of
flame
2.3.104
flame detector operating characteristics
that function of the flame detector which indicates absence or presence of flame as the output
signal of the flame detector relating to the input signal
Note 1 to entry: Normally the input signal is provided by a flame sensor.
2.3.104.1
signal for presence of flame
S
minimum signal which indicates the presence of flame when there was previously no flame
2.3.104.2
signal for absence of flame
S
maximum signal which indicates the loss of flame
Note 1 to entry: S is less than S .
2 1
2.3.104.3
maximum flame signal
S
max
maximum signal which does not affect the timings or the sequence
2.3.104.4
signal for visible light flame simulation
S
minimum signal which indicates the presence of flame during the visible light flame simulation
test
Note 1 to entry: S is less than S .
3 2
2.3.105
self-checking flame detector
flame detector which checks for correct operation of the flame detector and its associated
electronic circuitry while the burner is in the running position
2.3.106
flame detector self-checking rate
frequency of the self-checking function of the flame detector (in number of operations per
unit of time)
2.3.107
flame failure lock-out time
period of time between the signal indicating absence of flame and lock-out
2.3.108
flame failure re-ignition time
relight time
period of time between the signal indicating absence of flame and the signal to energize the
ignition device, during which the fuel supply is not shut off
– 10 – 60730-2-5 © IEC:2013
2.3.109
flame signal
output signal of the flame detector
2.3.110
flame simulation
condition which occurs when the flame detector indicates the presence of flame when in
reality no flame is present
2.3.111
ignition time
period of time during which the ignition device is energized
2.3.112
lock-out
process in which the system goes into one of the following lock-out conditions, following
safety shut-down
2.3.112.1
non-volatile lock-out
condition such that a restart can only be accomplished by a manual reset of the system and by
no other cause
2.3.112.2
volatile lock-out
condition such that a restart can be accomplished by either a manual reset of the system or by
an interruption of the power supply and its subsequent restoration
2.3.113
main flame establishing period
period of time between the signal to energize the main fuel flow means and the signal
indicating presence of the main burner flame
2.3.114
pilot flame establishing period
period of time between the signal to energize the pilot fuel flow means and the signal
indicating presence of the pilot flame
2.3.115
post-ignition time
period of the ignition time between the signal indicating presence of flame and the signal to
de-energize the ignition device
2.3.116
pre-ignition time
period of the ignition time between the signal to ignite and the signal to energize the fuel flow
means
2.3.117
proved igniter
system in which the fuel flow means is energized only after the availability of sufficient energy
to ignite the fuel has been verified
Note 1 to entry: Examples are systems using spark supervision and those using proved hot surface igniters.
60730-2-5 © IEC:2013 – 11 –
2.3.117.1
proved igniter operating value
signal which indicates that the proved igniter has the energy to ignite the fuel
2.3.117.2
igniter proving time
period of time between the signal to energize the proved igniter and the signal to energize the
fuel flow means
2.3.117.3
igniter failure response time
period of time between loss of the supervised proved igniter and the signal to de-energize the
fuel flow means
2.3.118
purge time
period during which air is introduced to displace any remaining air/fuel mixtures or products of
combustion from the combustion zone and flue ways
Note 1 to entry: No fuel is admitted during this period.
2.3.118.1
post-purge time
purge time that takes place immediately following the shutting off of the fuel supply
2.3.118.2
pre-purge time
purge time that takes place between initiation of a burner control sequence and the
admission of fuel to the burner
2.3.119
re-ignition
relight
process by which, following loss of the flame signal, the ignition device will be re-energized
without interruption of the fuel flow means
2.3.120
recycle time
period of time between the signal to de-energize the fuel flow means following the loss of flame
and the signal to begin a new start-up procedure
2.3.121
running position
position denoting that the main burner flame is established and supervised
2.3.122
safety shut-down
de-energization of the main fuel flow means as the result of the action of a limiter, a cut-out or
the detection of an internal fault of the system
Note 1 to entry: Safety shut-down may include additional actions by the system.
2.3.123
start position
position which denotes that the system is not in the lock-out condition and has not yet received
the start signal, but can proceed with the start-up sequence if required
– 12 – 60730-2-5 © IEC:2013
2.3.124
start signal
signal, for example, from a thermostat, which releases the system from its start position
2.3.125
start-up lock-out time
period of time between the signal to energize the fuel flow means and lock-out
Note 1 to entry: For systems which control two separate fuel flow means, two different start-up lock-out times are
possible (first and second start-up lock-out times).
2.3.126
waiting time
period between the start signal and the signal to energize the ignition device
Note 1 to entry: For burners without fans, natural ventilation of the combustion chamber and the flue passages
normally takes place during this time.
2.3.127
valve open period
for multitry systems, the period of time between the signal to energize the fuel flow means,
and the signal to de-energize the fuel flow means, if proof of the supervised burner flame is not
established
Note 1 to entry: In the USA, this period is referred to as the "trial-for-ignition period."
2.3.128
valve sequence period
for multitry systems, the sum of all valve opening periods prior to lock-out, if proof of the
supervised burner flame is not established
2.3.129
system restart
process by which, after a safety shut-down, a full start-up procedure is automatically repeated
2.3.130
reset from lock-out function
function that provides reset from lock-out allowing the system to attempt a restart
Note 1 to entry: The reset function may be performed by various electric/electronic (mobile) devices.
2.3.131
common cause failures
failures of different items, resulting from a single event, where these failures are not
consequences of each other
Note 1 to entry: Common cause failures should not be confused with common mode failures.
[SOURCE: IEC 60050-191:1990,191-04-23]
60730-2-5 © IEC:2013 – 13 –
2.5 Definitions of types of control according to construction
Additional definitions:
2.5.101
system for permanent operation
system which is intended to remain in the running position for longer than 24 h without
interruption
2.5.102
system for non-permanent operation
system which is intended to remain in the running position for less than 24 h
Additional definitions:
2.101 Definitions relating to the type of burner (see 6.101)
2.101.1
continuous ignition
type of ignition which, once placed in operation, is intended to remain energized continuously
until it is manually interrupted
2.101.2
continuous pilot
pilot which, once placed in operation, is intended to remain ignited continuously until it is
manually interrupted
2.101.3
direct ignition
type of ignition which is applied directly to the main burner, without the use of a pilot
2.101.4
expanding pilot
form of continuous pilot where the pilot flame is increased or expanded when required to
ignite the main burner and reduced either immediately after main burner ignition, or after the
main flame is shut off
2.101.5
full rate start
condition in which the main burner ignition and subsequent flame supervision occur at full
fuel rate
2.101.6
intermittent ignition
type of ignition which is energized when an appliance is called on to operate and which remains
continuously energized during each period of main burner operation and where the ignition is
de-energized when the main burner operating cycle is completed
– 14 – 60730-2-5 © IEC:2013
2.101.7
intermittent pilot
pilot which is automatically ignited when an appliance is called on to operate and which
remains continuously ignited during each period of main burner operation and where the pilot
is automatically extinguished when each main burner operating cycle is completed
2.101.8
interrupted ignition
type of ignition which is energized prior to the admission of fuel to the main burner and which is
de-energized when the main flame is established
2.101.9
interrupted pilot
pilot which is automatically ignited prior to the admission of fuel to the main burner and which
is automatically extinguished when the main flame is established
2.101.10
low rate start
condition in which main burner ignition occurs at low fuel rate
Note 1 to entry: Once ignition at low fuel rate occurs and the flame is proved, full main burner fuel rate may be
admitted.
2.101.11
pilot
flame, smaller than the main flame, which is utilized to ignite the main burner or burners
3 General requirements
This clause of Part 1 is applicable.
4 General notes on tests
This clause of Part 1 is applicable except as follows:
4.1 Conditions of test
4.1.1 Replacement:
Unless otherwise specified, the system and each system component are tested as delivered,
having been mounted as declared in Table 1 (7.2 of the previous edition), requirement 31, in
the most unfavourable position when there is more than one position.
When a separate system component is submitted, the manufacturer shall provide those other
system components which may be necessary to perform the relevant tests.
4.1.7 Not applicable.
4.2 Samples required
4.2.1 Replacement:
Unless otherwise specified, one sample shall be used for the tests of Clauses 5 to 14 inclusive.
A different sample(s) shall be used for the tests of Clauses 15 to 17. At the option of the
manufacturer, the tests of Clauses 18 to 26 inclusive may be conducted on a new sample or on
60730-2-5 © IEC:2013 – 15 –
the sample(s) used for the tests of Clauses 5 to 14 inclusive. The tests of Clause 27 shall be
conducted on a new sample.
4.3 Instructions for test
4.3.2.1 Modification:
Delete "and those for a.c./d.c. at the more unfavourable supply."
4.3.2.4 Not applicable.
4.3.2.6 Replacement:
For systems marked or declared for more than one rated voltage or rated current, the tests of
Clause 17 are made at the rated voltage and associated current (or vice versa) which produces
the most unfavourable combination.
5 Rating
This clause of Part 1 is applicable.
6 Classification
This clause of Part 1 is applicable except as follows:
6.1 According to nature of supply
6.1.1 Systems for a.c. only
Replace explanatory matter by the following requirement:
Systems intended for use on a.c. only supply shall only be used on a.c. supplies.
6.1.3 Not applicable.
6.3 According to their purpose
Additional subclauses:
6.3.101 – burner control system;
6.3.102 – flame detector;
6.3.103 – programming unit;
6.3.104 – ignition device;
6.3.105 – electronic high-voltage ignition source;
6.3.106 – flame sensor.
6.4 According to features of automatic action
6.4.1 Not applicable.
6.4.3 Addition:
– 16 – 60730-2-5 © IEC:2013
Burner control systems are classified as having Type 2 action.
6.4.3.12 Not applicable.
Additional subclauses:
6.4.3.101 – non-volatile lock-out (Type 2.V);
6.4.3.102 – volatile lock-out (Type 2.W);
6.4.3.103 – non-permanent operation (Type 2.AC);
6.4.3.104 – permanent operation (Type 2.AD);
6.4.3.105 – spark supervision (Type 2.AE);
6.4.3.106 – air/pressure flow supervision (Type 2.AF);
6.4.3.107 – position-checked external devices (Type 2.AG);
6.4.3.108 – visible light flame simulation check (Type 2.AH);
6.4.3.109 – proved hot surface igniter (Type 2.AI).
6.7 According to ambient temperature limits of the switch head
6.7.1 Modification:
Replace "Control with a switch head" by "System and system components".
6.7.2 Modification:
Replace "Control with a switch head" by "System and system components".
6.10 According to number of cycles of actuation (M) of each manual action
6.10.5 to 6.10.7 Not applicable.
6.11 According to number of automatic cycles (A) of each automatic action
Addition:
NOTE In the countries members of CENELEC, the minimum value is 250 000 automatic cycles. In Canada, China,
in Japan and the USA, the minimum value is 100 000 cycles.
6.11.4 to 6.11.12 Not applicable.
6.15 According to construction
6.15.3 Not applicable.
6.16 Not applicable.
Additional subclauses:
6.101 According to type of burner
NOTE Classification could be according to burner operation (for example, forced draught) and type of fuel (for
example, gas). See 2.101.1 to 2.101.11.
60730-2-5 © IEC:2013 – 17 –
6.102 According to type of pilot
6.103 According to type of ignition
6.104 According to starting fuel rate
7 Information
This clause of Part 1 is applicable except as follows:
7.2.6 Replacement:
Except as indicated in 7.4, for integrated systems all information is provided by means of
declaration (X). For incorporated systems not declared under requirement 50, the marking
required is as indicated in Table 1 (7.2 of the previous edition). For incorporated systems
declared under requirement 50, the only marking required is the manufacturer's name or trade
mark and the unique type reference if other required marking is provided by documentation
(D).
NOTE See the explanation of documentation (D) contained in 7.2.1.
7.2.9 Modification:
Replace "T other than 55 °C" by "T other than 60 °C" in the line for symbol for "Ambient
max max
temperature limits of switch head".
– 18 – 60730-2-5 © IEC:2013
Table 1 (7.2 of the previous edition) (1 of 2)
Information Clause or subclause Method
Modification:
Replace the following requirements by:
4 Nature of supply (a.c. or d.c.) 4.3.2, 6.1 C
6 Purpose of system or system component 4.3.5, 6.3 D
7)
7 The type of load controlled by each circuit 14, 17.3.1, 6.2, H.27.1.2 D
8)
15 Degree of protection provided by enclosure 6.5.1, 6.5.2, 11.5 D
17 Which of the terminals are suitable for the connection of external 6.6, 7.4.2, 7.4.3 D
conductors, and if they are suitable for line or neutral conductors,
or both
22 Temperature limits of the system and system components if T 6.7, 14.5, 14.7, 17.3 D
min
is lower than 0 °C, or T other than 60 °C
max
23 Temperature limits of mounting surfaces (T ) 6.12.2, 14.1, 17.3 D
s
101)
26 Number of cycles of actuation (M) for each manual action 6.10 X
28 Not applicable
5)
31 Method of mounting the system and each system component 4.1.1, 11.6 D
34 Details of any limitation of operating time 6.4.3.103, 6.4.3.104, 14, 17 D
37 Not applicable
38 Not applicable
6.4.3 D
40 Additional features of Type 2 actions
41 Not applicable
42 Not applicable
44 Not applicable
46 Operating sequence 2.3.13, 11.3.108, 15 D
48 Not applicable
50 System or system components intended to be delivered exclusively 7.2.1, 7.2.6 X
to the equipment manufacturer
Add the following additional requirements:
101 Maximum flame detector response time (if applicable) 2.3.103, 15 D
102 Minimum flame detector self-checking rate (if applicable) 2.3.106, 11.3.107, 15 D
2.3.107, 15 D
103 Maximum flame failure lock-out time (if applicable)
104 Maximum flame-failure re-ignition time (if applicable) 2.3.108, 15 D
105 Maximum ignition time (if applicable) 2.3.111, 15 D
106 Maximum main flame establishing period (if applicable) 2.3.113, 15 D
107 Maximum pilot flame establishing period (if applicable) 2.3.114, 15 D
108 Maximum post-ignition time (if applicable) 2.3.115, 15 D
109 Maximum pre-ignition time (if applicable) 2.3.116, 15 D
110 Void
2.3.118.1, 15 D
111 Minimum post-purge time (if applicable)
112 Minimum pre-purge time (if applicable) 2.3.118.2, 15 D
113 Minimum recycle time (if applicable) 2.3.120, 15 D
114 Maximum start-up lock-out time (if applicable) 2.3.125, 15 D
60730-2-5 © IEC:2013 – 19 –
Table 1 (2 of 2)
Information Clause or subclause Method
2.3.126, 15 D
115 Minimum waiting time (if applicable)
116 Type of burner 6.101 D
117 Type of pilot 6.102, 2.101.2, 2.101.4, D
2.101.7, 2.101.9, 2.101.11
118 Type of ignition 2.101.1, 2.101.3, 2.101.6, D
2.101.8, 6.103
119 See Annex H
11.3.4 X
120 Means for protecting setting of timings
121 See Annex H
122 Resistance to vibration 17.1.3, 17.16.103 D
123 S (signal for presence of flame) 2.3.104.1, 15.5, 15.6, 15.7 D
124 S (signal for absence of flame) 2.3.104.2, 15.5, 15.6, 15.7 D
103)
125 S (maximum flame signal, if applicable) 2.3.104.3, 15.5, 15.6, 15.7 D
max
102)
126 Electronic high-voltage ignition spark gap 13.2.101 D
127 Other system components for use with the submitted components 2.2.101, 2.2.102, 2.2.104, D
to provide a complete system 2.2.106
128 For each valve opening period, the maximum time (if applicable) 2.3.127, 11.3.113, D
15.5 p)
129 Maximum valve sequence period (if applicable) 2.3.128, 11.3.112, 15.5 q) D
130 S (signal for visible light flame simulation ) 2.3.104.4, 11.3.110 X
2.3.117 D
131 For proved igniters, the characteristics (energy, current, voltage,
resistance, temperature, etc.) which establish that the proved igniter
has the energy to ignite the fuel
2.3.117.1, 15.7, 17.16.108, D
132 Proved igniter operating value
H.27.1.1.3
(Minimum and/or maximum, as applicable)
2.3.117.2, 15.5 D
133 Maximum igniter proving time (If applicable)
2.3.117.3, 15.5 D
134 Maximum igniter failure response time (If applicable)
135 Type of lock-out 2.3.112, 11.3.108 D
136 See Annex H
137 External overcurrent device (if applicable) 11.3.5.2.1a) D
138 Maximum short circuit current as declared 11.3.5.2.1b) D
NOTES
Additional notes:
101)
For 17.16.105, the number of manual actions for lock-out re-set is a minimum of 6 000.
102)
If a range is declared, the maximum value is used for the test of 13.2.102 and 13.2.103.
103)
S shall be declared for those systems in which the maximum flame signal affects timings or sequence.
max
– 20 – 60730-2-5 © IEC:2013
8 Protection against electric shock
This clause of Part 1 is applicable except as follows:
8.1 General requirements
Additional subclause:
8.1.101 High-voltage ignition sources
Provision shall be made for protection against contact with high-voltage ignition sources
having any of the following characteristics:
a) for continuous spark ignition (pulses within the mains frequency range):
– the maximum voltage is higher than 10 kV (peak), and/or
– the maximum current is higher than 0,7 mA (peak);
b) for pulse spark ignition: (see Figure 101)
– the charge of an individual ignition pulse exceeds 100 μC, and
– the duration (d) is greater than 0,1 s, and
– the interval (i) between individual ignition pulses is less than 0,25 s.
Either the system manufacturer shall provide a warning that is visible when the high-voltage
ignition source is mounted as in normal use, or the equipment manufacturer shall be advised
of the need to provide such protection or a warning.
Voltage
100 %
10 %
d
i Time
IEC 2670/13
Figure 101 – Pulse spark generation
8.3 Cap
...
IEC 60730-2-5 ®
Edition 4.1 2017-08
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Automatic electrical controls –
Part 2-5: Particular requirements for automatic electrical burner control systems
Commandes électriques automatiques –
Partie 2-5: Exigences particulières pour les systèmes de commande électrique
automatique des brûleurs
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IEC 60730-2-5 ®
Edition 4.1 2017-08
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Automatic electrical controls –
Part 2-5: Particular requirements for automatic electrical burner control systems
Commandes électriques automatiques –
Partie 2-5: Exigences particulières pour les systèmes de commande électrique
automatique des brûleurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.120 ISBN 978-2-8322-8583-1
IEC 60730-2-5 ®
Edition 4.1 2017-08
REDLINE VERSION
VERSION REDLINE
colour
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Automatic electrical controls –
Part 2-5: Particular requirements for automatic electrical burner control systems
Commandes électriques automatiques –
Partie 2-5: Exigences particulières pour les systèmes de commande électrique
automatique des brûleurs
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© IEC 2017
CONTENTS
FOREWORD . 4
1 Scope and normative references . 7
2 Terms and definitions . 9
3 General requirements . 17
4 General notes on tests . 17
5 Rating . 18
6 Classification . 18
7 Information . 19
8 Protection against electric shock . 23
9 Provision for protective earthing . 23
10 Terminals and terminations . 23
11 Constructional requirements . 24
12 Moisture and dust resistance . 31
13 Electric strength and insulation resistance . 31
14 Heating. 32
15 Manufacturing deviation and drift . 33
16 Environmental stress . 34
17 Endurance . 34
18 Mechanical strength . 37
19 Threaded parts and connections . 38
20 Creepage distances, clearances and distances through solid insulation. 38
21 Resistance to heat, fire and tracking . 38
22 Resistance to corrosion . 38
23 Electromagnetic compatibility (EMC) requirements – Emission . 38
24 Components . 38
25 Normal operation . 38
26 Electromagnetic compatibility (EMC) requirements – Immunity . 38
27 Abnormal operation . 38
28 Guidance on the use of electronic disconnection . 39
Annex H (normative) Requirements for electronic controls . 40
Annex J (normative) Requirements for thermistor elements and controls using
thermistors . 58
Annex BBAA (informative) Functional characteristics of burner control systems to be
specified by the relevant appliance standards, as applicable . 59
Annex BB (informative) Specific regional requirements in Japan . 60
Bibliography . 62
Figure 101 – Pulse spark generation . 23
Figure H.101 – Voltage variation test . 44
© IEC 2017
Table 1 (7.2 of the previous edition 3) – Required information and methods
of providing information (1 of 2) . 21
Table H.1 (7.2 of the previous edition) . 41
Table H.101 – Timing of short-term supply voltage variations . 44
Table H.103 – Peak voltages . 49
Table H.103 – Test levels for electrostatic discharge . 50
Table BBAA.1 – Functional characteristics of burner control systems to be specified
by the relevant appliance standards, as applicable . 59
Table BB.1 – Comparison between JIS and adopted international standard . 61
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© IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AUTOMATIC ELECTRICAL CONTROLS –
Part 2-5: Particular requirements for automatic
electrical burner control systems
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 60730-2-5 edition 4.1 contains the fourth edition (2013-11) [documents 72/922/FDIS
and 72/929/RVD] and its amendment 1 (2017-08) [documents 72/1084/FDIS and
72/1103/RVD].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendment 1. Additions are in green text, deletions are in strikethrough
red text. A separate Final version with all changes accepted is available in this
publication.
© IEC 2017
International Standard IEC 60730-2-5 has been prepared by IEC technical committee 72:
Automatic electrical controls.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part 2-5 is intended to be used in conjunction with IEC 60730-1. It was established on
the basis of the fourth edition (2010) of that publication. Consideration may be given to future
editions of, or amendments to, IEC 60730-1.
The title of IEC 60730-2-5 Ed. 4 has been updated to the title of IEC 60730-1 Ed. 5.0.
However, IEC 60730-2-5 Ed. 4.0 has not been updated in accordance with the technical
requirements in IEC 60730-1 Ed. 5.0.
This part 2-5 supplements or modifies the corresponding clauses in IEC 60730-1 so as to
convert that publication into the IEC standard: Safety requirements for automatic electrical
burner control systems.
Where this part 2-5 states "addition", "modification", or "replacement", the relevant
requirement, test specification or explanatory matter in Part 1 should be adapted accordingly.
Where no change is necessary, this part 2-5 indicates that the relevant clause or subclause
applies.
In the development of a fully international standard, it has been necessary to take into
consideration the differing requirements resulting from practical experience in various parts of
the world and to recognize the variation in national electrical systems and wiring rules.
The “in some countries” notes regarding differing national practices are contained in the following subclauses:
– 2.3.127
– 6.11
– 15.7
– 17.16.102.1
– H.26.11.103
– Table H.21, Note 7
In this publication:
1) The following print types are used:
– Requirements proper: in roman type;
– Test specifications: in italic type;
– Explanatory matter; in small roman type;
– Words defined in Clause 2: bold.
2) Subclauses, notes, tables and figures which are additional to those in Part 1 are
numbered starting from 101, additional annexes are lettered AA, BB, etc.
A list of all parts of the IEC 60730 series, under the general title Automatic electrical controls
can be found on the IEC website.
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© IEC 2017
The committee has decided that the contents of the base publication and its amendment will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
The contents of the corrigendum 1 (2023-10) have been included in this copy.
© IEC 2017
AUTOMATIC ELECTRICAL CONTROLS –
Part 2-5: Particular requirements for automatic
electrical burner control systems
1 Scope and normative references
This clause of Part 1 is applicable except as follows:
1.1 Scope
Replacement:
This part of IEC 60730 applies to automatic electrical burner control systems for the
automatic control of burners for oil, gas, coal or other combustibles for household and
similar use including heating, air conditioning and similar use.
This part 2-5 is applicable to a complete burner control system and to a separate
programming unit. This part 2-5 is also applicable to a separate electronic high-voltage
ignition source and to a separate flame detector.
NOTE Separate ignition devices (electrodes, pilot burners, etc.) are not covered by this part 2-5 unless they are
submitted as part of a burner control system. Requirements for separate ignition transformers are contained in
IEC 60989.
Throughout this part 2-5, where it can be used unambiguously, the word "system" means
"burner control system" and "systems" means "burner control systems".
Systems utilizing thermoelectric flame supervision are not covered by this part 2-5.
1.1.1 This part 2-5 applies to the inherent safety, to the manufacturer's declared operating
values, operating times and operating sequences where such are associated with burner
safety and to the testing of automatic electrical burner control systems used in, on, or in
association with, burners.
NOTE Requirements for specific operating values, operating times and operating sequences are given in the
standards for appliances and equipment.
Systems for equipment not intended for normal household use, but which nevertheless may
be used by the public, such as equipment intended to be used by laymen in shops, in light
industry and on farms, are within the scope of this part 2-5.
This part 2-5 applies to systems using NTC or PTC thermistors, additional requirements for
which are contained in Annex J.
This part 2-5 does not apply to systems designed exclusively for industrial applications.
1.1.2 This part 2-5 applies to manual controls when such are electrically and/or
mechanically integral with automatic controls.
NOTE Requirements for manual switches not forming part of an automatic control are contained in IEC 61058-1.
Throughout this part 2-5, the word "equipment" means "appliance and equipment".
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© IEC 2017
This part of IEC 60730 applies to automatic electrical burner control systems for the
automatic control of burners for oil, gas, coal or other combustibles intended to be used
• for household and similar use,
• in shops, offices, hospitals, farms and commercial and industrial applications.
This International Standard is applicable
• to a complete burner control system,
• to a separate programming unit,
• to a separate electronic high-voltage ignition source,
• to a separate flame detector and
• to a separate high-temperature operation (HTO) detector.
NOTE 1 Throughout this document, where it can be used unambiguously, the word "system" means "burner
control system" and "systems" means "burner control systems".
NOTE 2 Throughout this document, the word "equipment" means "appliance and equipment."
This standard does not apply to thermoelectric flame supervision controls; thermoelectric
flame supervision controls are covered by ISO 23551-6.
This document also applies to electrical burner control systems intended exclusively for
industrial process applications e.g. those applications covered by ISO TC 244 (ISO 13577).
1.1.1 This document applies to the inherent safety, to the declared operating values,
operating times and operating sequences where such are associated with burner safety
and to the testing of automatic electrical burner control systems used in, on, or in
association with, burners.
NOTE Requirements for specific operating values, operating times and operating sequences are given in the
standards for appliances and equipment.
1.1.2 This document applies to AC or DC powered systems with a rated voltage not
exceeding 660 V AC or 600 V DC.
1.1.3 This document does not take into account the response value of an automatic action
of a control, if such a response value is dependent upon the method of mounting the
control in the equipment. Where a response value is of significant purpose for the protection
of the user, or surroundings, the value defined in the appropriate equipment standard or as
determined by the manufacturer applies.
1.1.4 This document applies also to systems incorporating electronic devices, requirements
for which are contained in Annex H.
1.1.5 This document applies to systems using NTC or PTC thermistors, additional
requirements for which are contained in Annex J.
1.1.6 This document includes systems responsive to flame properties and temperature for
HTO.
1.2 Replacement:
This part 2-5 applies to systems with a rated voltage not exceeding 660 V and with a rated
current not exceeding 63 A.
1.3 Replacement:
© IEC 2017
This part 2-5 does not take into account the response value of an automatic action of a
control, if such a response value is dependent upon the method of mounting the control in
the equipment. Where a response value is of significant purpose for the protection of the
user, or surroundings, the value defined in the appropriate household equipment standard or
as determined by the manufacturer applies.
NOTE This part 2-5 includes systems responsive to flame properties.
1.4 Replacement:
This part 2-5 applies also to systems incorporating electronic devices, requirements for
which are contained in Annex H.
1.51.2 Normative references
This clause of Part 1 is applicable except as follows:
Addition:
IEC 60068-2-6, Environmental testing – Part 2: Tests – Test Fc: Vibration (sinusoidal)
IEC 60079-20-1:2010, Explosive atmospheres – Part 20-1: Material characteristics for gas
and vapour classification – Test methods and data
IEC 61643-11, Low-voltage surge protective devices – Part 11: Surge protective devices
connected to low-voltage power systems – Requirements and test methods
ISO 23551-6:2014, Safety and control devices for gas burners and gas-burning appliances –
Particular requirements – Part 6: Thermoelectric flame supervision controls
Replacement:
IEC 60127-1:2015, Miniature fuses – Part 1: Definitions for miniature fuses and general
requirements for miniature fuse-links
2 Terms and definitions
This clause of Part 1 is applicable except as follows:
2.2 Definitions of types of control according to purpose
NOTE Definition 2.2.23 is not applicable.
Additional definitions:
2.2.101
burner control system
system which includes a programming unit, a flame detector or, if applicable, an HTO
detector and may include an ignition source and/or ignition device and which monitors the
operation of fuel burners
Note 1 to entry: The various functions of the system may be in one or more housings.
2.2.102
flame detector
device which provides the programming unit with a signal indicating the presence or
absence of flame
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© IEC 2017
Note 1 to entry: It includes the flame sensor and may include an amplifier and a relay for signal transmission.
The amplifier and relay may be in its own housing or combined with the programming unit.
2.2.103
flame sensor
device which senses the flame and provides the input signal to the flame detector amplifier
Note 1 to entry: Examples are optical sensors and flame electrodes (flame rods).
2.2.104
ignition source
electrical or electronic system component which provides energy to an ignition device
Note 1 to entry: It may be separated from or incorporated in the programming unit. Examples are ignition
transformers and electronic high-voltage generators.
2.2.105
ignition device
device mounted on or adjacent to a burner for igniting fuel at the burner
Note 1 to entry: Examples are pilot burners, spark electrodes and hot surface igniters.
2.2.106
programming unit
device which controls the burner operation in a declared sequence from start-up to shut-
down within declared timings and in response to signals from regulating, limiting and
monitoring devices
2.2.107
multitry system
system that allows more than one valve open period during its declared operating
sequence
2.2.108
HTO detector
device which provides the programming unit with a signal indicating presence or absence of
HTO
Note 1 to entry: It includes the HTO-sensor and may include an amplifier and a relay for signal transmission.
The amplifier and relay may be in its own housing or combined with the programming unit.
2.2.109
HTO-sensor
device which senses the temperature of a surface or a medium within the combustion
chamber which is in direct contact with a flammable fuel-air mixture and provides a signal
indicating presence or absence of HTO
2.2.110
auto-ignition temperature
AIT
lowest temperature (of a hot surface or the environment) at which an ignition of a flammable
fuel/air mixture occurs
[SOURCE: IEC 60079-20-1:2010,3.3, modified : "or the environment" has been added in the
parenthesis, "at which under specified test conditions" has been deleted and " flammable gas
or vapour in mixture with air or air/inert gas" has been replaced by " flammable fuel/air
mixture"]
© IEC 2017
2.2.111
high-temperature operation
HTO
operation on the basis of auto-ignition temperature which assures ignition and burning of
fuel
Note 1 to entry: High-temperature operation is used e.g. in fuel cells (IEC 62282-3-100) and in industrial
furnaces and associated processing equipment (ISO 13577) where ignition and burning is detected by means of
sensing the temperature.
2.3 Definitions relating to the function of controls
2.3.30
T
max
Replace "switch head" by "burner control system."
2.3.32
safety shut-down
Replacement:
de-energization of the main fuel flow means as the result of the action of a limiter, a cut-out or
the detection of an internal fault of the system
Note 1 to entry: Safety shut-down may include additional actions by the system.
Additional definitions:
2.3.101
automatic recycle
automatic repetition of the start-up procedure, without manual intervention, following loss of
the supervised flame and subsequent fuel supply shutoff
2.3.102
controlled shut-down
de-energization of the fuel flow means as a result of the opening of a control loop by a control
device such as a thermostat leading the system to return to the start position
Note 1 to entry: Controlled shut-down may include additional actions by the system.
2.3.103
flame detector response time
period of time between the loss of the sensed flame and the signal indicating the absence of
flame
2.3.104
flame detector operating characteristics
that function of the flame detector which indicates absence or presence of flame as the
output signal of the flame detector relating to the input signal
Note 1 to entry: Normally the input signal is provided by a flame sensor.
2.3.104.1
signal for presence of flame
S
minimum signal which indicates the presence of flame when there was previously no flame
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© IEC 2017
2.3.104.2
signal for absence of flame
S
maximum signal which indicates the loss of flame
Note 1 to entry: S is less than S .
2 1
2.3.104.3
maximum flame signal
S
max
maximum signal which does not affect the timings or the sequence
2.3.104.4
signal for visible light flame simulation
S
minimum signal which indicates the presence of flame during the visible light flame
simulation test
Note 1 to entry: S is less than S .
3 2
2.3.105
self-checking flame detector
flame detector which checks for correct operation of the flame detector and its associated
electronic circuitry while the burner is in the running position
2.3.106
flame detector self-checking rate
frequency of the self-checking function of the flame detector (in number of operations per
unit of time)
2.3.107
flame failure lock-out time
flame failure response time
period of time between the signal indicating absence of flame and lock-out
2.3.108
flame failure re-ignition time
relight time
period of time between the signal indicating absence of flame and the signal to energize the
ignition device, during which the fuel supply is not shut off
2.3.109
flame signal
output signal of the flame detector
2.3.110
flame simulation
condition which occurs when the flame detector indicates the presence of flame when in
reality no flame is present
2.3.111
ignition time
period of time during which the ignition device is energized
2.3.112
lock-out
process in which the system goes into one of the following lock-out conditions, following
safety shut-down
© IEC 2017
2.3.112.1
non-volatile lock-out
condition such that a restart can only be accomplished by a manual reset of the system and
by no other cause
2.3.112.2
volatile lock-out
condition such that a restart can be accomplished by either a manual reset of the system or
by an interruption of the power supply and its subsequent restoration
2.3.113
main flame establishing period
period of time between the signal to energize the main fuel flow means and the signal
indicating presence of the main burner flame
2.3.114
pilot flame establishing period
period of time between the signal to energize the pilot fuel flow means and the signal
indicating presence of the pilot flame
2.3.115
post-ignition time
period of the ignition time between the signal indicating presence of flame and the signal to
de-energize the ignition device
2.3.116
pre-ignition time
period of the ignition time between the signal to ignite and the signal to energize the fuel
flow means
2.3.117
proved igniter
proved igniter system
system in which the fuel flow means is energized only after the availability of sufficient energy
to ignite the fuel has been verified
Note 1 to entry: Examples are systems using spark supervision and those using proved hot surface igniters.
2.3.117.1
proved igniter operating value
signal which indicates that the proved igniter has the energy to ignite the fuel
2.3.117.2
igniter proving time
period of time between the signal to energize the proved igniter and the signal to energize
the fuel flow means
2.3.117.3
igniter failure response time
period of time between loss of the supervised proved igniter and the signal to de-energize
the fuel flow means
2.3.118
purge time
period during which air is introduced to displace any remaining air/fuel mixtures or products of
combustion from the combustion zone and flue ways
Note 1 to entry: No fuel is admitted during this period.
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© IEC 2017
2.3.118.1
post-purge time
purge time that takes place immediately following the shutting off of the fuel supply
2.3.118.2
pre-purge time
purge time that takes place between initiation of a burner control sequence and the
admission of fuel to the burner
2.3.119
re-ignition
relight
process by which, following loss of the flame signal, the ignition device will be re-energized
without interruption of the fuel flow means
2.3.120
recycle time
period of time between the signal to de-energize the fuel flow means following the loss of
flame and the signal to begin a new start-up procedure
2.3.121
running position
position denoting that the main burner flame is established and supervised, or the burner is in
HTO and supervised
2.3.122 Void
safety shut-down
de-energization of the main fuel flow means as the result of the action of a limiter, a cut-out or
the detection of an internal fault of the system
Note 1 to entry: Safety shut-down may include additional actions by the system.
2.3.123
start position
position which denotes that the system is not in the lock-out condition and has not yet
received the start signal, but can proceed with the start-up sequence if required
2.3.124
start signal
signal, for example, from a thermostat, which releases the system from its start position
2.3.125
start-up lock-out time
period of time between the signal to energize the fuel flow means and lock-out
Note 1 to entry: For systems which control two separate fuel flow means, two different start-up lock-out times
are possible (first and second start-up lock-out times).
2.3.126
waiting time
period between the start signal and the signal to energize the ignition device
Note 1 to entry: For burners without fans, natural ventilation of the combustion chamber and the flue passages
normally takes place during this time.
© IEC 2017
2.3.127
valve open period
for multitry systems, the period of time between the signal to energize the fuel flow means,
and the signal to de-energize the fuel flow means, if proof of the supervised burner flame is
not established
Note 1 to entry: In the USA, this period is referred to as the "trial-for-ignition period."
2.3.128
valve sequence period
for multitry systems, the sum of all valve opening periods prior to lock-out, if proof of the
supervised burner flame is not established
2.3.129
system restart
process by which, after a safety shut-down, a full start-up procedure is automatically
repeated
2.3.130
reset from lock-out function
function that provides reset from lock-out allowing the system to attempt a restart
Note 1 to entry: The reset function may be performed by various electric/electronic (mobile) devices.
2.3.131
common cause failures
failures of different items, resulting from a single event, where these failures are not
consequences of each other
Note 1 to entry: Common cause failures should not be confused with common mode failures.
[SOURCE: IEC 60050-191:1990,191-04-23]
2.3.132
HTO detector response time
period of time between the temperature falling below the defined temperature limit for HTO
and the signal indicating the absence of HTO
2.3.133
HTO detector operating characteristics
that function of the HTO detector which indicates absence or presence of HTO as the output
signal of the HTO detector relating to the input signal
Note 1 to entry: Normally the input signal is provided by a HTO-sensor.
2.3.134
HTO response time
period of time between the signal indicating absence of HTO and proceeding to safety shut-
down or to switch over to flame supervision
2.3.135
HTO signal
output signal of the HTO detector
2.5 Definitions of types of control according to construction
Additional definitions:
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© IEC 2017
2.5.101
system for permanent operation
system which is intended to remain in the running position for longer than 24 h without
interruption
2.5.102
system for non-permanent operation
system which is intended to remain in the running position for less than 24 h
Additional definitions:
2.101 Definitions relating to the type of burner (see 6.101)
2.101.1
continuous ignition
type of ignition which, once placed in operation, is intended to remain energized continuously
until it is manually interrupted
2.101.2
continuous pilot
pilot which, once placed in operation, is intended to remain ignited continuously until it is
manually interrupted
2.101.3
direct ignition
type of ignition which is applied directly to the main burner, without the use of a pilot
2.101.4
expanding pilot
form of continuous pilot where the pilot flame is increased or expanded when required to
ignite the main burner and reduced either immediately after main burner ignition, or after the
main flame is shut off
2.101.5
full rate start
condition in which the main burner ignition and subsequent flame supervision occur at full
fuel rate
2.101.6
intermittent ignition
type of ignition which is energized when an appliance is called on to operate and which
remains continuously energized during each period of main burner operation and where the
ignition is de-energized when the main burner operating cycle is completed
2.101.7
intermittent pilot
pilot which is automatically ignited when an appliance is called on to operate and which
remains continuously ignited during each period of main burner operation and where the
pilot is automatically extinguished when each main burner operating cycle is completed
2.101.8
interrupted ignition
type of ignition which is energized prior to the admission of fuel to the main burner and which
is de-energized when the main flame is established
© IEC 2017
2.101.9
interrupted pilot
pilot which is automatically ignited prior to the admission of fuel to the main burner and which
is automatically extinguished when the main flame is established
2.101.10
low rate start
condition in which main burner ignition occurs at low fuel rate
Note 1 to entry: Once ignition at low fuel rate occurs and the flame is proved, full main burner fuel rate may be
admitted.
2.101.11
pilot
flame, smaller than the main flame, which is utilized to ignite the main burner or burners
3 General requirements
This clause of Part 1 is applicable.
4 General notes on tests
This clause of Part 1 is applicable except as follows:
4.1 Conditions of test
4.1.1 Replacement:
Unless otherwise specified, the system and each system component are tested as delivered,
having been mounted as declared in Table 1 (7.2 of the previous edition), requirement 31, in
the most unfavourable position when there is more than one position.
When a separate system component is submitted, the manufacturer shall provide those other
system components which may be necessary to perform the relevant tests.
4.1.7 Not applicable.
4.2 Samples required
4.2.1 Replacement:
Unless otherwise specified, one sample shall be used for the tests of Clauses 5 to 14
inclusive. A different sample(s) shall be used for the tests of Clauses 15 to 17. At the option
of the manufacturer, the tests of Clauses 18 to 26 inclusive including the relevant annexes
may be conducted on a new sample or on the sample(s) used for the tests of Clauses 5 to 14
inclusive. The tests of Clause 27 shall be conducted on a new sample.
4.3 Instructions for test
4.3.2.1 Modification:
Delete "and those for a.c./d.c. at the more unfavourable supply."
4.3.2.4 Not applicable.
4.3.2.6 Replacement:
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© IEC 2017
For systems marked or declared for more than one rated voltage or rated current, the tests of
Clause 17 are made at the rated voltage and associated current (or vice versa) which
produces the most unfavourable combination.
5 Rating
This clause of Part 1 is applicable.
6 Classification
This clause of Part 1 is applicable except as follows:
6.1 According to nature of supply
6.1.1 Systems for a.c. only
Replace explanatory matter by the following requirement:
Systems intended for use on a.c. only supply shall only be used on a.c. supplies.
6.1.3 Not applicable.
6.3 According to their purpose
Additional subclauses:
6.3.101 – burner control system;
6.3.102 – flame detector;
6.3.103 – programming unit;
6.3.104 – ignition device;
6.3.105 – electronic high-voltage ignition source;
6.3.106 – flame sensor;
6.3.107 – HTO detector;
6.3.108 – HTO-sensor.
6.4 According to features of automatic action
6.4.1 Not applicable.
6.4.3 Addition:
Burner control systems are classified as having Type 2 action.
6.4.3.12 Not applicable.
Additional subclauses:
6.4.3.101 – non-volatile lock-out (Type 2.V);
6.4.3.102 – volatile lock-out (Type 2.W);
© IEC 2017
6.4.3.103 – non-permanent operation (Type 2.AC);
6.4.3.104 – permanent operation (Type 2.AD);
6.4.3.105 – spark supervision (Type 2.AE);
6.4.3.106 – air/pressure flow supervision (Type 2.AF);
6.4.3.107 – position-checked external devices (Type 2.AG);
6.4.3.108 – visible light flame simulation check (Type 2.AH);
6.4.3.109 – proved hot surface igniter (Type 2.AI).
6.7 According
...
IEC 60730-2-5 ®
Edition 4.2 2021-01
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Automatic electrical controls –
Part 2-5: Particular requirements for automatic electrical burner control systems
Commandes électriques automatiques –
Partie 2-5: Exigences particulières pour les systèmes de commande électrique
automatique des brûleurs
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IEC 60730-2-5 ®
Edition 4.2 2021-01
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Automatic electrical controls –
Part 2-5: Particular requirements for automatic electrical burner control systems
Commandes électriques automatiques –
Partie 2-5: Exigences particulières pour les systèmes de commande électrique
automatique des brûleurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.120 ISBN 978-2-8322-9355-3
IEC 60730-2-5 ®
Edition 4.2 2021-01
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Automatic electrical controls –
Part 2-5: Particular requirements for automatic electrical burner control systems
Commandes électriques automatiques –
Partie 2-5: Exigences particulières pour les systèmes de commande électrique
automatique des brûleurs
– 2 – IEC 60730-2-5:2013+AMD1:2017
+AMD2:2021 CSV © IEC 2021
CONTENTS
FOREWORD . 4
1 Scope and normative references . 7
2 Terms and definitions . 10
3 General requirements . 17
4 General notes on tests . 17
5 Rating . 18
6 Classification . 18
7 Information . 20
8 Protection against electric shock . 23
9 Provision for protective earthing . 23
10 Terminals and terminations . 23
11 Constructional requirements . 24
12 Moisture and dust resistance . 33
13 Electric strength and insulation resistance . 33
14 Heating. 34
15 Manufacturing deviation and drift . 35
16 Environmental stress . 36
17 Endurance . 36
18 Mechanical strength . 40
19 Threaded parts and connections . 40
20 Creepage distances, clearances and distances through solid insulation. 40
21 Resistance to heat, fire and tracking . 40
22 Resistance to corrosion . 40
23 Electromagnetic compatibility (EMC) requirements – Emission . 40
24 Components . 40
25 Normal operation . 40
26 Electromagnetic compatibility (EMC) requirements – Immunity . 41
27 Abnormal operation . 41
28 Guidance on the use of electronic disconnection . 41
Annex H (normative) Requirements for electronic controls . 42
Annex J (normative) Requirements for thermistor elements and controls using
thermistors . 60
Annex BBAA (informative) Functional characteristics of burner control systems to be
specified by the relevant appliance standards, as applicable . 61
Annex BB (informative) Specific regional requirements in Japan . 62
Bibliography . 64
Figure 101 – Pulse spark generation . 23
Figure 102 – Typical installation of the independent combustion air supply for room
independent operation . 32
Figure H.101 – Voltage variation test . 46
+AMD2:2021 CSV © IEC 2021
Table 1 (7.2 of edition 3) – Required information and methods
of providing information (1 of 2) . 21
Table H.1 (7.2 of the previous edition) . 43
Table H.101 – Timing of short-term supply voltage variations . 46
Table H.103 – Test levels for electrostatic discharge . 52
Table H.24 (H.27.1 of edition 3) – Electrical/electronic component fault modes table . 57
Table AA.1 – Functional characteristics of burner control systems to be specified by
the relevant appliance standards, as applicable . 61
Table BB.1 – Comparison between JIS and adopted international standard . 63
– 4 – IEC 60730-2-5:2013+AMD1:2017
+AMD2:2021 CSV © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AUTOMATIC ELECTRICAL CONTROLS –
Part 2-5: Particular requirements for automatic
electrical burner control systems
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendments has been
prepared for user convenience.
IEC 60730-2-5 edition 4.2 contains the fourth edition (2013-11) [documents 72/922/FDIS
and 72/929/RVD], its amendment 1 (2017-08) [documents 72/1084/FDIS and 72/1103/RVD]
and its amendment 2 (2021) [documents 72/1259/FDIS and 72/1262/RVD].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendments 1 and 2. Additions are in green text, deletions are in
strikethrough red text. A separate Final version with all changes accepted is available
in this publication.
+AMD2:2021 CSV © IEC 2021
International Standard IEC 60730-2-5 has been prepared by IEC technical committee 72:
Automatic electrical controls.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part 2-5 is intended to be used in conjunction with IEC 60730-1. It was established on
the basis of the fourth edition (2010) of that publication the fifth edition:2013, including
Amendment 1:2015 and Amendment 2:2020 of that publication. Consideration may be given
to future editions of, or amendments to, IEC 60730-1.
The title of IEC 60730-2-5 Ed. 4 has been updated to the title of IEC 60730-1 Ed. 5.0.
However, IEC 60730-2-5 Ed. 4.0 has not been updated in accordance with the technical
requirements in IEC 60730-1 Ed. 5.0.
This part 2-5 supplements or modifies the corresponding clauses in IEC 60730-1 so as to
convert that publication into the IEC standard: Safety requirements for automatic electrical
burner control systems.
Where this part 2-5 states "addition", "modification", or "replacement", the relevant
requirement, test specification or explanatory matter in Part 1 should be adapted accordingly.
Where no change is necessary, this part 2-5 indicates that the relevant clause or subclause
applies.
In the development of a fully international standard, it has been necessary to take into
consideration the differing requirements resulting from practical experience in various parts of
the world and to recognize the variation in national electrical systems and wiring rules.
The “in some countries” notes regarding differing national practices are contained in the following subclauses:
– 2.3.127
– 6.11
– 15.7
– 17.16.102.1
– H.26.11.103101
– Table H.21, Note 7 Table H.24, Note i
In this publication:
1) The following print types are used:
– Requirements proper: in roman type;
– Test specifications: in italic type;
– Explanatory matter; in small roman type;
– Words defined in Clause 2: bold.
2) Subclauses, notes, tables and figures which are additional to those in Part 1 are
numbered starting from 101, additional annexes are lettered AA, BB, etc.
A list of all parts of the IEC 60730 series, under the general title Automatic electrical controls
can be found on the IEC website.
– 6 – IEC 60730-2-5:2013+AMD1:2017
+AMD2:2021 CSV © IEC 2021
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
+AMD2:2021 CSV © IEC 2021
AUTOMATIC ELECTRICAL CONTROLS –
Part 2-5: Particular requirements for automatic
electrical burner control systems
1 Scope and normative references
This clause of Part 1 is applicable except as follows:
1.1 Scope
Replacement:
This part of IEC 60730 applies to automatic electrical burner control systems for the
automatic control of burners for oil, gas, coal or other combustibles for household and
similar use including heating, air conditioning and similar use.
This part 2-5 is applicable to a complete burner control system and to a separate
programming unit. This part 2-5 is also applicable to a separate electronic high-voltage
ignition source and to a separate flame detector.
NOTE Separate ignition devices (electrodes, pilot burners, etc.) are not covered by this part 2-5 unless they are
submitted as part of a burner control system. Requirements for separate ignition transformers are contained in
IEC 60989.
Throughout this part 2-5, where it can be used unambiguously, the word "system" means
"burner control system" and "systems" means "burner control systems".
Systems utilizing thermoelectric flame supervision are not covered by this part 2-5.
1.1.1 This part 2-5 applies to the inherent safety, to the manufacturer's declared operating
values, operating times and operating sequences where such are associated with burner
safety and to the testing of automatic electrical burner control systems used in, on, or in
association with, burners.
NOTE Requirements for specific operating values, operating times and operating sequences are given in the
standards for appliances and equipment.
Systems for equipment not intended for normal household use, but which nevertheless may
be used by the public, such as equipment intended to be used by laymen in shops, in light
industry and on farms, are within the scope of this part 2-5.
This part 2-5 applies to systems using NTC or PTC thermistors, additional requirements for
which are contained in Annex J.
This part 2-5 does not apply to systems designed exclusively for industrial applications.
1.1.2 This part 2-5 applies to manual controls when such are electrically and/or
mechanically integral with automatic controls.
NOTE Requirements for manual switches not forming part of an automatic control are contained in IEC 61058-1.
Throughout this part 2-5, the word "equipment" means "appliance and equipment".
– 8 – IEC 60730-2-5:2013+AMD1:2017
+AMD2:2021 CSV © IEC 2021
Replacement:
This part of IEC 60730 applies to automatic electrical burner control systems for the
automatic control of burners for oil, gas, coal or other combustibles intended to be used
• for household and similar use,
• in shops, offices, hospitals, farms and commercial and industrial applications.
This International Standard is applicable
• to a complete burner control system,
• to a separate programming unit,
• to a separate electronic high-voltage ignition source,
• to a separate flame detector and
• to a separate high-temperature operation (HTO) detector.
• to a burner control system intended to be used in warm air heating appliances (furnaces)
where the appliance is equipped with an electromechanical differential pressure control to
monitor the difference of the combustion air pressure (Type 2.AL). This pressure control
provides a switch as an alternative to one of the two switching elements to directly de-
energize the safety relevant terminals.
NOTE 1 Throughout this document, where it can be used unambiguously, the word "system" means "burner
control system" and "systems" means "burner control systems".
NOTE 2 Throughout this document, the word "equipment" means "appliance and equipment."
This standard does not apply to thermoelectric flame supervision controls; thermoelectric
flame supervision controls are covered by ISO 23551-6.
This document also applies to electrical burner control systems intended exclusively for
industrial process applications e.g. those applications covered by ISO TC 244 (ISO 13577).
This document applies to controls powered by primary or secondary batteries, requirements
for which are contained within the standard, including Annex V.
1.1.1 This document applies to the inherent safety, to the declared operating values,
operating times and operating sequences where such are associated with burner safety
and to the testing of automatic electrical burner control systems used in, on, or in
association with, burners.
NOTE Requirements for specific operating values, operating times and operating sequences are given in the
standards for appliances and equipment.
1.1.2 This document applies to AC or DC powered systems with a rated voltage not
exceeding 660 V AC or 600 V DC.
1.1.3 This document does not take into account the response value of an automatic action
of a control, if such a response value is dependent upon the method of mounting the
control in the equipment. Where a response value is of significant purpose for the protection
of the user, or surroundings, the value defined in the appropriate equipment standard or as
determined by the manufacturer applies.
1.1.4 This document applies also to systems incorporating electronic devices, requirements
for which are contained in Annex H.
1.1.5 This document applies to systems using NTC or PTC thermistors, additional
requirements for which are contained in Annex J.
+AMD2:2021 CSV © IEC 2021
1.1.6 This document includes systems responsive to flame properties and temperature for
HTO.
1.1.7 This document applies to the electrical and functional safety of controls capable of
receiving and responding to communications signals. The signals may be transmitted to or
received from external units, connected wired or wireless, that may or may not be part of the
burner control system.
1.1.8 This document does not address the integrity of the output signal to the network
devices, such as interoperability with other devices, unless it has been evaluated as part of
the control system.
1.2 Replacement:
This part 2-5 applies to systems with a rated voltage not exceeding 660 V and with a rated
current not exceeding 63 A.
1.3 Replacement:
This part 2-5 does not take into account the response value of an automatic action of a
control, if such a response value is dependent upon the method of mounting the control in
the equipment. Where a response value is of significant purpose for the protection of the
user, or surroundings, the value defined in the appropriate household equipment standard or
as determined by the manufacturer applies.
NOTE This part 2-5 includes systems responsive to flame properties.
1.4 Replacement:
This part 2-5 applies also to systems incorporating electronic devices, requirements for
which are contained in Annex H.
1.51.2 Normative references
This clause of Part 1 is applicable except as follows:
Addition:
IEC 60068-2-6, Environmental testing – Part 2: Tests – Test Fc: Vibration (sinusoidal)
IEC 60079-20-1:2010, Explosive atmospheres – Part 20-1: Material characteristics for gas
and vapour classification – Test methods and data
IEC 61643-11, Low-voltage surge protective devices – Part 11: Surge protective devices
connected to low-voltage power systems – Requirements and test methods
ISO 23551-6:2014, Safety and control devices for gas burners and gas-burning appliances –
Particular requirements – Part 6: Thermoelectric flame supervision controls
Replacement:
IEC 60127-1:2015, Miniature fuses – Part 1: Definitions for miniature fuses and general
requirements for miniature fuse-links
– 10 – IEC 60730-2-5:2013+AMD1:2017
+AMD2:2021 CSV © IEC 2021
2 Terms and definitions
This clause of Part 1 is applicable except as follows:
2.2 Definitions of types of control according to purpose
NOTE Definition 2.2.23 is not applicable.
2.2.23 Not applicable.
Additional definitions:
2.2.101
burner control system
system which includes a programming unit, a flame detector or, if applicable, an HTO
detector and may include an ignition source and/or ignition device and which monitors the
operation of fuel burners
Note 1 to entry: The various functions of the system may be in one or more housings.
2.2.102
flame detector
device which provides the programming unit with a signal indicating the presence or
absence of flame
Note 1 to entry: It includes the flame sensor and may include an amplifier and a relay for signal transmission.
The amplifier and relay may be in its own housing or combined with the programming unit.
2.2.103
flame sensor
device which senses the flame and provides the input signal to the flame detector amplifier
Note 1 to entry: Examples are optical sensors and flame electrodes (flame rods).
2.2.104
ignition source
electrical or electronic system component which provides energy to an ignition device
Note 1 to entry: It may be separated from or incorporated in the programming unit. Examples are ignition
transformers and electronic high-voltage generators.
2.2.105
ignition device
device mounted on or adjacent to a burner for igniting fuel at the burner
Note 1 to entry: Examples are pilot burners, spark electrodes and hot surface igniters.
2.2.106
programming unit
device which controls the burner operation in a declared sequence from start-up to shut-
down within declared timings and in response to signals from regulating, limiting and
monitoring devices
2.2.107
multitry system
system that allows more than one valve open period during its declared operating
sequence
+AMD2:2021 CSV © IEC 2021
2.2.108
HTO detector
device which provides the programming unit with a signal indicating presence or absence of
HTO
Note 1 to entry: It includes the HTO-sensor and may include an amplifier and a relay for signal transmission.
The amplifier and relay may be in its own housing or combined with the programming unit.
2.2.109
HTO-sensor
device which senses the temperature of a surface or a medium within the combustion
chamber which is in direct contact with a flammable fuel-air mixture and provides a signal
indicating presence or absence of HTO
2.2.110
auto-ignition temperature
AIT
lowest temperature (of a hot surface or the environment) at which an ignition of a flammable
fuel/air mixture occurs
[SOURCE: IEC 60079-20-1:2010,3.3, modified : "or the environment" has been added in the
parenthesis, "at which under specified test conditions" has been deleted and " flammable gas
or vapour in mixture with air or air/inert gas" has been replaced by " flammable fuel/air
mixture"]
2.2.111
high-temperature operation
HTO
operation on the basis of auto-ignition temperature which assures ignition and burning of
fuel
Note 1 to entry: High-temperature operation is used e.g. in fuel cells (IEC 62282-3-100) and in industrial
furnaces and associated processing equipment (ISO 13577) where ignition and burning is detected by means of
sensing the temperature.
2.3 Definitions relating to the function of controls
2.3.30
T
max
Replace "switch head" by "burner control system."
2.3.32
safety shut-down
Replacement:
de-energization of the main fuel flow means as the result of the action of a limiter, a cut-out or
the detection of an internal fault of the system
Note 1 to entry: Safety shut-down may include additional actions by the system.
Additional definitions:
2.3.101
automatic recycle
automatic repetition of the start-up procedure, without manual intervention, following loss of
the supervised flame and subsequent fuel supply shutoff
– 12 – IEC 60730-2-5:2013+AMD1:2017
+AMD2:2021 CSV © IEC 2021
2.3.102
controlled shut-down
de-energization of the fuel flow means as a result of the opening of a control loop by a control
device such as a thermostat leading the system to return to the start position
Note 1 to entry: Controlled shut-down may include additional actions by the system.
2.3.103
flame detector response time
period of time between the loss of the sensed flame and the signal indicating the absence of
flame
2.3.104
flame detector operating characteristics
that function of the flame detector which indicates absence or presence of flame as the
output signal of the flame detector relating to the input signal
Note 1 to entry: Normally the input signal is provided by a flame sensor.
2.3.104.1
signal for presence of flame
S
minimum signal which indicates the presence of flame when there was previously no flame
2.3.104.2
signal for absence of flame
S
maximum signal which indicates the loss of flame
Note 1 to entry: S is less than S .
2 1
2.3.104.3
maximum flame signal
S
max
maximum signal which does not affect the timings or the sequence
2.3.104.4
signal for visible light flame simulation
S
minimum signal which indicates the presence of flame during the visible light flame
simulation test
Note 1 to entry: S is less than S .
3 2
2.3.105
self-checking flame detector
flame detector which checks for correct operation of the flame detector and its associated
electronic circuitry while the burner is in the running position
2.3.106
flame detector self-checking rate
frequency of the self-checking function of the flame detector (in number of operations per
unit of time)
2.3.107
flame failure lock-out time
flame failure response time
period of time between the signal indicating absence of flame and lock-out
+AMD2:2021 CSV © IEC 2021
2.3.108
flame failure re-ignition time
relight time
period of time between the signal indicating absence of flame and the signal to energize the
ignition device, during which the fuel supply is not shut off
2.3.109
flame signal
output signal of the flame detector
2.3.110
flame simulation
condition which occurs when the flame detector indicates the presence of flame when in
reality no flame is present
2.3.111
ignition time
period of time during which the ignition device is energized
2.3.112
lock-out
process in which the system goes into one of the following lock-out conditions, following
safety shut-down
2.3.112.1
non-volatile lock-out
condition such that a restart can only be accomplished by a manual reset of the system and
by no other cause
2.3.112.2
volatile lock-out
condition such that a restart can be accomplished by either a manual reset of the system or
by an interruption of the power supply and its subsequent restoration
2.3.113
main flame establishing period
period of time between the signal to energize the main fuel flow means and the signal
indicating presence of the main burner flame
2.3.114
pilot flame establishing period
period of time between the signal to energize the pilot fuel flow means and the signal
indicating presence of the pilot flame
2.3.115
post-ignition time
period of the ignition time between the signal indicating presence of flame and the signal to
de-energize the ignition device
2.3.116
pre-ignition time
period of the ignition time between the signal to ignite and the signal to energize the fuel
flow means
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2.3.117
proved igniter
proved igniter system
system in which the fuel flow means is energized only after the availability of sufficient energy
to ignite the fuel has been verified
Note 1 to entry: Examples are systems using spark supervision and those using proved hot surface igniters.
2.3.117.1
proved igniter operating value
signal which indicates that the proved igniter has the energy to ignite the fuel
2.3.117.2
igniter proving time
period of time between the signal to energize the proved igniter and the signal to energize
the fuel flow means
2.3.117.3
igniter failure response time
period of time between loss of the supervised proved igniter and the signal to de-energize
the fuel flow means
2.3.118
purge time
period during which air is introduced to displace any remaining air/fuel mixtures or products of
combustion from the combustion zone and flue ways
Note 1 to entry: No fuel is admitted during this period.
2.3.118.1
post-purge time
purge time that takes place immediately following the shutting off of the fuel supply
2.3.118.2
pre-purge time
purge time that takes place between initiation of a burner control sequence and the
admission of fuel to the burner
2.3.119
re-ignition
relight
process by which, following loss of the flame signal, the ignition device will be re-energized
without interruption of the fuel flow means
2.3.120
recycle time
period of time between the signal to de-energize the fuel flow means following the loss of
flame and the signal to begin a new start-up procedure
2.3.121
running position
position denoting that the main burner flame is established and supervised, or the burner is in
HTO and supervised
2.3.122 Void
safety shut-down
de-energization of the main fuel flow means as the result of the action of a limiter, a cut-out or
the detection of an internal fault of the system
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Note 1 to entry: Safety shut-down may include additional actions by the system.
2.3.123
start position
position which denotes that the system is not in the lock-out condition and has not yet
received the start signal, but can proceed with the start-up sequence if required
2.3.124
start signal
signal, for example, from a thermostat, which releases the system from its start position
2.3.125
start-up lock-out time
period of time between the signal to energize the fuel flow means and lock-out
Note 1 to entry: For systems which control two separate fuel flow means, two different start-up lock-out times
are possible (first and second start-up lock-out times).
2.3.126
waiting time
period between the start signal and the signal to energize the ignition device
Note 1 to entry: For burners without fans, natural ventilation of the combustion chamber and the flue passages
normally takes place during this time.
2.3.127
valve open period
for multitry systems, the period of time between the signal to energize the fuel flow means,
and the signal to de-energize the fuel flow means, if proof of the supervised burner flame is
not established
Note 1 to entry: In the USA and Canada, this period is referred to as the "trial-for-ignition period."
2.3.128
valve sequence period
for multitry systems, the sum of all valve opening periods prior to lock-out, if proof of the
supervised burner flame is not established
2.3.129
system restart
process by which, after a safety shut-down, a full start-up procedure is automatically
repeated
2.3.130
reset from lock-out function
function that provides reset from lock-out allowing the system to attempt a restart
Note 1 to entry: The reset function may be performed by various electric/electronic (mobile) devices.
2.3.131
common cause failures
failures of different items, resulting from a single event, where these failures are not
consequences of each other
Note 1 to entry: Common cause failures should not be confused with common mode failures.
[SOURCE: IEC 60050-191:1990,191-04-23]
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2.3.132
HTO detector response time
period of time between the temperature falling below the defined temperature limit for HTO
and the signal indicating the absence of HTO
2.3.133
HTO detector operating characteristics
that function of the HTO detector which indicates absence or presence of HTO as the output
signal of the HTO detector relating to the input signal
Note 1 to entry: Normally the input signal is provided by a HTO-sensor.
2.3.134
HTO response time
period of time between the signal indicating absence of HTO and proceeding to safety shut-
down or to switch over to flame supervision
2.3.135
HTO signal
output signal of the HTO detector
2.5 Definitions of types of control according to construction
Additional definitions:
2.5.101
system for permanent operation
system which is intended to remain in the running position for longer than 24 h without
interruption
2.5.102
system for non-permanent operation
system which is intended to remain in the running position for less than 24 h
Additional definitions:
2.101 Definitions relating to the type of burner (see 6.101)
2.101.1
continuous ignition
type of ignition which, once placed in operation, is intended to remain energized continuously
until it is manually interrupted
2.101.2
continuous pilot
pilot which, once placed in operation, is intended to remain ignited continuously until it is
manually interrupted
2.101.3
direct ignition
type of ignition which is applied directly to the main burner, without the use of a pilot
2.101.4
expanding pilot
form of continuous pilot where the pilot flame is increased or expanded when required to
ignite the main burner and reduced either immediately after main burner ignition, or after the
main flame is shut off
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2.101.5
full rate start
condition in which the main burner ignition and subsequent flame supervision occur at full
fuel rate
2.101.6
intermittent ignition
type of ignition which is energized when an appliance is called on to operate and which
remains continuously energized during each period of main burner operation and where the
ignition is de-energized when the main burner operating cycle is completed
2.101.7
intermittent pilot
pilot which is automatically ignited when an appliance is called on to operate and which
remains continuously ignited during each period of main burner operation and where the
pilot is automatically extinguished when each main burner operating cycle is completed
2.101.8
interrupted ignition
type of ignition which is energized prior to the admission of fuel to the main burner and which
is de-energized when the main flame is established
2.101.9
interrupted pilot
pilot which is automatically ignited prior to the admission of fuel to the main burner and which
is automatically extinguished when the main flame is established
2.101.10
low rate start
condition in which main burner ignition occurs at low fuel rate
Note 1 to entry: Once ignition at low fuel rate occurs and the flame is proved, full main burner fuel rate may be
admitted.
2.101.11
pilot
flame, smaller than the main flame, which is utilized to ignite the main burner or burners
3 General requirements
This clause of Part 1 is applicable.
4 General notes on tests
This clause of Part 1 is applicable except as follows:
4.1 Conditions of test
4.1.1 Replacement:
Unless otherwise specified, the system and each system component are tested as delivered,
having been mounted as declared in Table 1 (7.2 of the previous edition), requirement 31, in
the most unfavourable position when there is more than one position.
When a separate system component is submitted, the manufacturer shall provide those other
system components which may be necessary to perform the relevant tests.
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4.1.7 Not applicable.
4.2 Samples required
4.2.1 Replacement:
Unless otherwise specified, one sample shall be used for the tests of Clauses 5 to 14
inclusive. A different sample(s) shall be used for the tests of Clauses 15 to 17. At the option
of the manufacturer, the tests of Clauses 18 to 26 inclusive including the relevant annexes
may be conducted on a new sample or on the sample(s) used for the tests of Clauses 5 to 14
inclusive. The tests of Clause 27 shall be conducted on a new sample.
4.3 Instructions for test
4.3.2.1 Modification:
Delete "and those for a.c./d.c. at the more unfavourable supply."
4.3.2.4 Not applicable.
4.3.2.6 Replacement:
For systems marked or declared for more than one rated voltage or rated current, the tests of
Clause 17 are made at the rated voltage and associated current (or vice versa) wh
...
Frequently Asked Questions
IEC 60730-2-5:2013 is a standard published by the International Electrotechnical Commission (IEC). Its full title is "Automatic electrical controls - Part 2-5: Particular requirements for automatic electrical burner control systems". This standard covers: IEC 60730-2-5:2013 applies to automatic electrical burner control systems for the automatic control of burners for oil, gas, coal or other combustibles for household and similar use including heating, air conditioning and similar use. This part 2-5 is applicable to a complete burner control system and to a separate programming unit. This part 2-5 is also applicable to a separate electronic high-voltage ignition source and to a separate flame detector. Separate ignition devices (electrodes, pilot burners, etc.) are not covered by this part 2-5 unless they are submitted as part of a burner control system. Requirements for separate ignition transformers are contained in IEC 60989. Systems utilizing thermoelectric flame supervision are not covered by this part 2-5. This part 2-5 applies to the inherent safety, to the manufacturer's declared operating values, operating times and operating sequences where such are associated with burner safety and to the testing of automatic electrical burner control systems used in, on, or in association with, burners. It was established on the basis of the fourth edition (2010) of that publication. Consideration may be given to future editions of, or amendments to, IEC 60730-1. The title of IEC 60730-2-5 Ed4.0 has been updated to the title of IEC 60730-1 Ed5.0. However, IEC 60730-2-5 Ed4.0 has not been updated in accordance with the technical requirements in IEC 60730-1 Ed5.0. This part 2-5 supplements or modifies the corresponding clauses in IEC 60730-1 so as to convert that publication into the IEC standard: Safety requirements for automatic electrical burner control systems. Key words: Automatic control, Burner control This publication is to be read in conjunction with IEC 60730-1:2013. The contents of the corrigendum of October 2023 have been included in this copy.
IEC 60730-2-5:2013 applies to automatic electrical burner control systems for the automatic control of burners for oil, gas, coal or other combustibles for household and similar use including heating, air conditioning and similar use. This part 2-5 is applicable to a complete burner control system and to a separate programming unit. This part 2-5 is also applicable to a separate electronic high-voltage ignition source and to a separate flame detector. Separate ignition devices (electrodes, pilot burners, etc.) are not covered by this part 2-5 unless they are submitted as part of a burner control system. Requirements for separate ignition transformers are contained in IEC 60989. Systems utilizing thermoelectric flame supervision are not covered by this part 2-5. This part 2-5 applies to the inherent safety, to the manufacturer's declared operating values, operating times and operating sequences where such are associated with burner safety and to the testing of automatic electrical burner control systems used in, on, or in association with, burners. It was established on the basis of the fourth edition (2010) of that publication. Consideration may be given to future editions of, or amendments to, IEC 60730-1. The title of IEC 60730-2-5 Ed4.0 has been updated to the title of IEC 60730-1 Ed5.0. However, IEC 60730-2-5 Ed4.0 has not been updated in accordance with the technical requirements in IEC 60730-1 Ed5.0. This part 2-5 supplements or modifies the corresponding clauses in IEC 60730-1 so as to convert that publication into the IEC standard: Safety requirements for automatic electrical burner control systems. Key words: Automatic control, Burner control This publication is to be read in conjunction with IEC 60730-1:2013. The contents of the corrigendum of October 2023 have been included in this copy.
IEC 60730-2-5:2013 is classified under the following ICS (International Classification for Standards) categories: 97.120 - Automatic controls for household use. The ICS classification helps identify the subject area and facilitates finding related standards.
IEC 60730-2-5:2013 has the following relationships with other standards: It is inter standard links to IEC 60730-2-5:2013/AMD2:2021, IEC 60730-2-5:2013/AMD1:2017, IEC 60730-2-5:2013/COR1:2023, IEC 60730-2-5:2000, IEC 60730-2-5:2000/AMD1:2004, IEC 60730-2-5:2000/AMD2:2008. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase IEC 60730-2-5:2013 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of IEC standards.
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