IEC 60730-2-9:2015/AMD1:2018

Amendment 1 - Automatic electrical controls - Part 2-9: Particular requirements for temperature sensing controls

Amendement 1 - Commandes électriques automatiques - Partie 2-9: Exigences particulières pour les commandes de détection de température

General Information

• Status: Published
• Publication Date: 25-Jan-2018
• ICS: 97.120 - Automatic controls for household use
• Technical Committee: TC 72 - Automatic electrical controls
• Drafting Committee: WG 6 - TC 72/WG 6
• Current Stage: PPUB - Publication issued
• Start Date: 26-Jan-2018
• Completion Date: 16-Feb-2018

Relations

• Amends: IEC 60730-2-9:2015 - Automatic electrical controls - Part 2-9: Particular requirements for temperature sensing controls
• Effective Date: 05-Sep-2023

Overview

IEC 60730-2-9:2015/AMD1:2018 is Amendment 1 to the IEC requirement set for automatic electrical controls - Part 2-9: particular requirements for temperature sensing controls. This amendment updates definitions, classifications and guidance (Annex EE) for temperature sensing devices used in appliances and equipment. It clarifies the intended purpose of devices (thermostats, temperature limiters, thermal cut-outs, single operation devices, motor protectors) and refines test and declaration expectations for safety and performance.

Key topics and technical requirements

• Scope and updates: Adds and replaces text in Annex EE and other clauses to clarify device types, behaviour and testing expectations.
• Device classifications:
  • Type 1: Tested for inherent safety but not for operating temperature consistency - intended where controlled temperature is not safety-critical.
  • Type 2: Tested for inherent safety and for consistency of operating temperature (manufacturing tolerance and drift after specified tests).
• Control function classes:
  • Class A: Not relied upon for safety (e.g., room thermostats).
  • Class B: Intended to prevent unsafe appliance states (e.g., temperature limiters).
  • Class C: Intended to prevent special hazards whose failure could directly cause a hazard (e.g., certain thermal cut-outs in closed water systems).
• Device definitions and behaviour: Clear definitions for thermostats, temperature limiters, thermal cut-outs (self-resetting, non-self-resetting, voltage maintained), single operation devices (SOD) and motor protectors.
• Operational declarations and durability: The amendment notes expected cycle declarations for some protective devices (examples in the amendment: self-resetting devices may be declared between ~300 and 10 000 cycles; non-self-resetting at least 30 cycles; voltage-maintained types about 1 000 cycles).
• Regulatory notes: Country-specific restrictions are recorded (e.g., liquid metal on cooking/food handling equipment not allowed in China; parts containing mercury restricted in Canada).

Applications and who uses this standard

• Appliance manufacturers designing or certifying heaters, kettles, water heaters, hair dryers, transformers, fans, compressors and similar equipment.
• Control designers and component suppliers of temperature sensing devices (electromechanical and electronic).
• Test laboratories and compliance officers performing type testing, drift and durability assessments.
• Safety engineers and regulatory authorities assessing appliance hazard mitigation and protective control suitability.

Related standards

• IEC 60335-1 - definitions and appliance safety context for thermostats, limiters and cut-outs.
• IEC 60730-2-22 - thermal motor protectors (when built into motors).
• IEC 60691 - thermal links (single operation thermal elements).

Keywords: IEC 60730-2-9:2015/AMD1:2018, temperature sensing controls, automatic electrical controls, thermostat, temperature limiter, thermal cut-out, type 1 control, type 2 control, Class A/B/C control functions, appliance safety, testing and drift.

Standards Content (Sample)

IEC 60730-2-9 ®
Edition 4.0 2018-01
INTERNATIONAL
STANDARD
colour
inside
AMENDMENT 1
Automatic electrical controls –
Part 2-9: Particular requirements for temperature sensing controls

IEC 60730-2-9:2015-05/AMD1:2018-01(en)

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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International Standards for all electrical, electronic and related technologies.

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IEC 60730-2-9 ®
Edition 4.0 2018-01
INTERNATIONAL
STANDARD
colour
inside
AMENDMENT 1
Automatic electrical controls –

Part 2-9: Particular requirements for temperature sensing controls

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 97.120 ISBN 978-2-8322-5263-5

– 2 – IEC 60730-2-9:2015/AMD1:2018
© IEC 2018
FOREWORD
This amendment has been prepared by subcommittee IEC technical committee 72: Automatic
electrical controls.
The text of this amendment is based on the following documents:
FDIS Report on voting
72/1112A/FDIS 72/1118/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website 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.
A bilingual version of this publication may be issued at a later date.

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.
_____________
Table 1 – Required information and methods of providing information
Replace the existing Note 102 by the following:
In China, the use of liquid metal in or on cooking or food handling equipment is not allowed.
In Canada parts of controls containing mercury is not allowed.
Annex EE – Guide to the application of temperature sensing controls within the
scope of IEC 60730-2-9
EE.1.2 Overview
Replace the third paragraph by the following:

© IEC 2018
Controls classified as type 2 are also assessed to provide a degree of confidence in terms of
their operating temperature. Tests are made to determine that the spread of operating
temperature in the new condition is within the manufacturer’s declared value, and also to
determine that drift of operating temperature is within the manufacturer’s declared value after
the specified tests.
NOTE A temperature sensing control can be classified for more than one purpose, depending upon the
application.
EE.3.3 Types of temperature sensing controls according to their purpose
Replace the existing text of this subclause by the following:
EE.3.3.1 Thermostat
Cycling temperature sensing control, which is intended to keep a temperature between two
particular values under normal operating conditions of the controlled equipment and which
may have provision for setting by the user. A thermostat is therefore also classified as an
operating control with at least type 1 action (electromechanical) or at least Class A control
function (electronic control). A typical usage of thermostats is to control the normal running
temperature of a room heater or hot plate.
Thermostats are defined in IEC 60335-1 as follows:
thermostat
temperature-sensing device, the operating temperature of which may be either fixed or
adjustable and which during normal operation keeps the temperature of the controlled part
between certain limits by automatically opening and closing a circuit
EE.3.3.2 Temperature limiter
Temperature sensing control which is intended to keep a temperature below or above one
particular value during normal operating conditions of the controlled equipment and which
may have provision for setting by the user. A temperature limiter is therefore also classified
as an operating control with Class A control functions. Under certain applications, a
temperature limiter may be classified as an operating control with Class B control
functions. A typical usage of a temperature limiter with Class A function is to switch off a
kettle on boiling.
A temperature limiter may be of the automatic or of the manual reset type. It does not make
the reverse operation during the normal duty cycle of the appliance.
Temperature limiters are defined in IEC 60335-1 as follows:
temperature limiter
temperature-sensing device, the operating temperature of which may be either fixed or
adjustable and which during normal operation operates by opening or closing a circuit when
the temperature of the controlled part reaches a predetermined value
NOTE 1 A temperature limiter does not make the reverse operation during the normal duty cycle of the
appliance. It can require manual resetting.
NOTE 2 A temperature limiter control is used to limit the temperature of part of the appliance/equipment during
normal operation of the appliance. The differential between the operating and remake temperature of a
temperature limiter is large.
NOTE 3 An electromechanical temperature limiter can be either a type 1 or type 2 control depending on the
application.
NOTE 4 An electronic temperature limiter is classified as an operating control with Class A control functions.
Under certain applications, a temperature limiter may be classified as an operating control with Class B control
functions.
– 4 – IEC 60730-2-9:2015/AMD1:2018
© IEC 2018
EE.3.3.3 Thermal cut-out
Temperature sensing control intended to keep a temperature below or above one particular
value during abnormal operating conditions of the controlled equipment and which has no
provision for setting by the user. A thermal cut-out is therefore also classified as a
protective control with a type 2 action (electromechanical) or at least Class B control function
(electronic control). Under certain applications, an electronic thermal cut-out may be
classified as a protective control with Class C control functions, for example, water heaters.
Typical usage of thermal cut-outs is to provide overheating protection of a room heater, hot
plate or water heater.
A thermal cut-out may be of the automatic or manual reset type.
Thermal cut-outs are defined in IEC 60335-1 as follows:
a) thermal cut-out
device which during abnormal operation limits the temperature of the controlled part by
automatically opening the circuit, or by reducing the current, and is constructed so that its
setting cannot be altered by the user
NOTE 1 A thermal cut-out control does not operate during normal operation of the appliance. It is used to
regulate or limit the temperature of part of the appliance/equipment in fault conditions.
NOTE 2 When a thermal cut-out is built-in or on a motor, and is specifically intended to protect the motor against
overheating due to running overload and failure to start and carries the motor current and is sensitive to motor
temperature and current, it is a thermal motor protector. Thermal motor protectors are covered by
IEC 60730-2-22.
b) self-resetting thermal cut-out
thermal cut-out that automatically restores the current after the relevant part of the appliance
has cooled down sufficiently
NOTE 1 A self-resetting thermal cut-out control does not operate during normal operation of the appliance. It is
used to regulate the temperature of part of the appliance/equipment in fault conditions.
NOTE 2 A self-resetting thermal cut-out is normally a type 2 control depending on the application and a
declaration of number of cycles is between 300 and 10 000 (depending upon the end product application).
c) non-self-resetting thermal cut-out
thermal cut-out that requires a manual operation for resetting, or replacement of a part, in
order to restore the current
NOTE 1 Manual operation includes disconnection of the appliance from the supply mains.
NOTE 2 A non-self- resetting thermal cut-out control does not operate during normal operation of the
appliance. It is used to limit the temperature of part of the appliance/equipment in fault conditions and can
disconnect the appliance from the supply mains.
NOTE 3 A non-self- resetting thermal cut-out control is usually a type 2 control that provides either micro-
disconnection or full-disconnection. A declaration of the number of cycles of operation would be at least 30 cycles.
The following thermal cut-out is not specifically defined in IEC 60335 but can be used in
appliances:
voltage maintained thermal cut-out
thermal cut-out which is maintained in its operated condition by the voltage which appears
across it in that condition
NOTE 1 A voltage maintained thermal cut-out control can only be reset if the appliance is disconnected from
the electrical supply.
NOTE 2 A voltage maintained thermal cut-out control does not operate during normal operation of the
appliance. It is used to limit the temperature of part of the appliance/equipment in fault conditions and can
disconnect the appliance from the supply mains.
NOTE 3 A voltage maintained thermal cut-out control is a type 2 control. A declaration of the number of cycles
of operation would be at least 1 000 cycles.

© IEC 2018
EE.3.3.3.1 Motor protector
Automatic control that is specifically intended to protect the windings of an electric motor from
overheating.
EE.3.3.3.2 Thermal motor protector
Automatic control, built-in or on a motor, that is specifically intended to protect the motor
against overheating due to running overload and failure to start. The control carries the motor
current and is sensitive to motor temperature and current.
NOTE 1 These are covered by IEC 60730-2-22.
NOTE 2 If it is not built-in or on a motor, does not carry the motor current, is not sensitive to motor temperature
and current, it is a thermal cut-out, which is covered by IEC 60730-2-9.
EE.3.3.4 Single operation device (SOD)
EE.3.3.4.1 Bimetallic
Control having a bimetallic temperature sensing element, which is intended to operate only
once, and then requires complete replacement. A single operation device is therefore also
classified as a protective control with type 2 action (electromechanical). Typical usage of
single operation devices is to provide overheating protection of an electric kettle or water
heater.
A bimetallic single operation device does not reset above a declared temperature.
EE.3.3.4.2 Non-bimetallic
A non-bimetallic single operation device denotes a control having a non-bimetallic sensing
device, the operation of which cannot be separated from other functions of the control, and
which operates only once and then requires complete replacement. Such a device is
classified as a protective control.
If such parts can be tested separately, then they are identified as thermal links, which are not
within the scope of IEC 60730-2-9 and are covered by IEC 60691.
Typical usage of single operation devices is to provide overheating protection of an electric
kettle or water heater.
EE.3.3.5 Protective controls
These are defined in IEC 60335-1 as follows:
protective device
device, the operation of which prevents a hazardous situation under abnormal operation
conditions
NOTE 1 The aim of a protective device is to reduce the risk of a hazard by restoring the appliance to a fail-safe
under abnormal conditions of the end product. Based on the application, the protective device could be
automatically or manually resettable. Examples of a temperature protective device are single operation devices
(SOD), thermal links and thermal cut-outs.
NOTE 2 An electromechanical protective device control is a type 2 control. A declaration of the number of cycles
of operation would be 1 cycle.
NOTE 3 An electronic protective device is classified as a control with Class B or C control functions (depending
upon the application).
– 6 – IEC 60730-2-9:2015/AMD1:2018
© IEC 2018
EE.3.4 Features of automatic action
EE.3.4.1 Controls are classified either as type 1 or type 2
Replace the first two paragraphs as follows:
A type 1 control is tested fully to determine inherent safety, but is not tested to determine
operating temperature consistency, either in the new condition, or after the specified tests.
Type 1 controls are therefore intended to be used in applications where the controlled
temperature is not critical, in terms of performance or safety of the controlled equipment.
A type 2 control is tested for inherent safety and for consistency of operating temperature,
both in new condition, to check that the operating temperature is within the manufacturers’
declared manufacturing tolerance (manufacturing deviation), and also for the change in
operating
...

IEC 60730-2-9 ®
Edition 4.0 2018-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
A MENDMENT 1
AM ENDEMENT 1
Automatic electrical controls –
Part 2-9: Particular requirements for temperature sensing controls

Commandes électriques automatiques –
Partie 2-9: Exigences particulières pour les commandes de détection
de température
IEC 60730-2-9:2015-05/AMD1:2018-01(en-fr)

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IEC 60730-2-9 ®
Edition 4.0 2018-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
A MENDMENT 1
AM ENDEMENT 1
Automatic electrical controls –

Part 2-9: Particular requirements for temperature sensing controls

Commandes électriques automatiques –

Partie 2-9: Exigences particulières pour les commandes de détection

de température
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.120 ISBN 978-2-8322-8366-0

– 2 – IEC 60730-2-9:2015/AMD1:2018
© IEC 2018
FOREWORD
This amendment has been prepared by subcommittee IEC technical committee 72: Automatic
electrical controls.
The text of this amendment is based on the following documents:
FDIS Report on voting
72/1112A/FDIS 72/1118/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website 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.
_____________
Table 1 – Required information and methods of providing information
Replace the existing Note 102 by the following:
In China, the use of liquid metal in or on cooking or food handling equipment is not allowed.
In Canada parts of controls containing mercury is not allowed.
Annex EE – Guide to the application of temperature sensing controls within the
scope of IEC 60730-2-9
EE.1.2 Overview
Replace the third paragraph by the following:
Controls classified as type 2 are also assessed to provide a degree of confidence in terms of
their operating temperature. Tests are made to determine that the spread of operating
temperature in the new condition is within the manufacturer’s declared value, and also to

© IEC 2018
determine that drift of operating temperature is within the manufacturer’s declared value after
the specified tests.
NOTE A temperature sensing control can be classified for more than one purpose, depending upon the
application.
EE.3.3 Types of temperature sensing controls according to their purpose
Replace the existing text of this subclause by the following:
EE.3.3.1 Thermostat
Cycling temperature sensing control, which is intended to keep a temperature between two
particular values under normal operating conditions of the controlled equipment and which
may have provision for setting by the user. A thermostat is therefore also classified as an
operating control with at least type 1 action (electromechanical) or at least Class A control
function (electronic control). A typical usage of thermostats is to control the normal running
temperature of a room heater or hot plate.
Thermostats are defined in IEC 60335-1 as follows:
thermostat
temperature-sensing device, the operating temperature of which may be either fixed or
adjustable and which during normal operation keeps the temperature of the controlled part
between certain limits by automatically opening and closing a circuit
EE.3.3.2 Temperature limiter
Temperature sensing control which is intended to keep a temperature below or above one
particular value during normal operating conditions of the controlled equipment and which
may have provision for setting by the user. A temperature limiter is therefore also classified
as an operating control with Class A control functions. Under certain applications, a
temperature limiter may be classified as an operating control with Class B control
functions. A typical usage of a temperature limiter with Class A function is to switch off a
kettle on boiling.
A temperature limiter may be of the automatic or of the manual reset type. It does not make
the reverse operation during the normal duty cycle of the appliance.
Temperature limiters are defined in IEC 60335-1 as follows:
temperature limiter
temperature-sensing device, the operating temperature of which may be either fixed or
adjustable and which during normal operation operates by opening or closing a circuit when
the temperature of the controlled part reaches a predetermined value
NOTE 1 A temperature limiter does not make the reverse operation during the normal duty cycle of the
appliance. It can require manual resetting.
NOTE 2 A temperature limiter control is used to limit the temperature of part of the appliance/equipment during
normal operation of the appliance. The differential between the operating and remake temperature of a
temperature limiter is large.
NOTE 3 An electromechanical temperature limiter can be either a type 1 or type 2 control depending on the
application.
NOTE 4 An electronic temperature limiter is classified as an operating control with Class A control functions.
Under certain applications, a temperature limiter may be classified as an operating control with Class B control
functions.
– 4 – IEC 60730-2-9:2015/AMD1:2018
© IEC 2018
EE.3.3.3 Thermal cut-out
Temperature sensing control intended to keep a temperature below or above one particular
value during abnormal operating conditions of the controlled equipment and which has no
provision for setting by the user. A thermal cut-out is therefore also classified as a
protective control with a type 2 action (electromechanical) or at least Class B control function
(electronic control). Under certain applications, an electronic thermal cut-out may be
classified as a protective control with Class C control functions, for example, water heaters.
Typical usage of thermal cut-outs is to provide overheating protection of a room heater, hot
plate or water heater.
A thermal cut-out may be of the automatic or manual reset type.
Thermal cut-outs are defined in IEC 60335-1 as follows:
a) thermal cut-out
device which during abnormal operation limits the temperature of the controlled part by
automatically opening the circuit, or by reducing the current, and is constructed so that its
setting cannot be altered by the user
NOTE 1 A thermal cut-out control does not operate during normal operation of the appliance. It is used to
regulate or limit the temperature of part of the appliance/equipment in fault conditions.
NOTE 2 When a thermal cut-out is built-in or on a motor, and is specifically intended to protect the motor against
overheating due to running overload and failure to start and carries the motor current and is sensitive to motor
temperature and current, it is a thermal motor protector. Thermal motor protectors are covered by
IEC 60730-2-22.
b) self-resetting thermal cut-out
thermal cut-out that automatically restores the current after the relevant part of the appliance
has cooled down sufficiently
NOTE 1 A self-resetting thermal cut-out control does not operate during normal operation of the appliance. It is
used to regulate the temperature of part of the appliance/equipment in fault conditions.
NOTE 2 A self-resetting thermal cut-out is normally a type 2 control depending on the application and a
declaration of number of cycles is between 300 and 10 000 (depending upon the end product application).
c) non-self-resetting thermal cut-out
thermal cut-out that requires a manual operation for resetting, or replacement of a part, in
order to restore the current
NOTE 1 Manual operation includes disconnection of the appliance from the supply mains.
NOTE 2 A non-self- resetting thermal cut-out control does not operate during normal operation of the
appliance. It is used to limit the temperature of part of the appliance/equipment in fault conditions and can
disconnect the appliance from the supply mains.
NOTE 3 A non-self- resetting thermal cut-out control is usually a type 2 control that provides either micro-
disconnection or full-disconnection. A declaration of the number of cycles of operation would be at least 30 cycles.
The following thermal cut-out is not specifically defined in IEC 60335 but can be used in
appliances:
voltage maintained thermal cut-out
thermal cut-out which is maintained in its operated condition by the voltage which appears
across it in that condition
NOTE 1 A voltage maintained thermal cut-out control can only be reset if the appliance is disconnected from
the electrical supply.
NOTE 2 A voltage maintained thermal cut-out control does not operate during normal operation of the
appliance. It is used to limit the temperature of part of the appliance/equipment in fault conditions and can
disconnect the appliance from the supply mains.
NOTE 3 A voltage maintained thermal cut-out control is a type 2 control. A declaration of the number of cycles
of operation would be at least 1 000 cycles.

© IEC 2018
EE.3.3.3.1 Motor protector
Automatic control that is specifically intended to protect the windings of an electric motor from
overheating.
EE.3.3.3.2 Thermal motor protector
Automatic control, built-in or on a motor, that is specifically intended to protect the motor
against overheating due to running overload and failure to start. The control carries the motor
current and is sensitive to motor temperature and current.
NOTE 1 These are covered by IEC 60730-2-22.
NOTE 2 If it is not built-in or on a motor, does not carry the motor current, is not sensitive to motor temperature
and current, it is a thermal cut-out, which is covered by IEC 60730-2-9.
EE.3.3.4 Single operation device (SOD)
EE.3.3.4.1 Bimetallic
Control having a bimetallic temperature sensing element, which is intended to operate only
once, and then requires complete replacement. A single operation device is therefore also
classified as a protective control with type 2 action (electromechanical). Typical usage of
single operation devices is to provide overheating protection of an electric kettle or water
heater.
A bimetallic single operation device does not reset above a declared temperature.
EE.3.3.4.2 Non-bimetallic
A non-bimetallic single operation device denotes a control having a non-bimetallic sensing
device, the operation of which cannot be separated from other functions of the control, and
which operates only once and then requires complete replacement. Such a device is
classified as a protective control.
If such parts can be tested separately, then they are identified as thermal links, which are not
within the scope of IEC 60730-2-9 and are covered by IEC 60691.
Typical usage of single operation devices is to provide overheating protection of an electric
kettle or water heater.
EE.3.3.5 Protective controls
These are defined in IEC 60335-1 as follows:
protective device
device, the operation of which prevents a hazardous situation under abnormal operation
conditions
NOTE 1 The aim of a protective device is to reduce the risk of a hazard by restoring the appliance to a fail-safe
under abnormal conditions of the end product. Based on the application, the protective device could be
automatically or manually resettable. Examples of a temperature protective device are single operation devices
(SOD), thermal links and thermal cut-outs.
NOTE 2 An electromechanical protective device control is a type 2 control. A declaration of the number of cycles
of operation would be 1 cycle.
NOTE 3 An electronic protective device is classified as a control with Class B or C control functions (depending
upon the application).
– 6 – IEC 60730-2-9:2015/AMD1:2018
© IEC 2018
EE.3.4 Features of automatic action
EE.3.4.1 Controls are classified either as type 1 or type 2
Replace the first two paragraphs as follows:
A type 1 control is tested fully to determine inherent safety, but is not tested to determine
operating temperature consistency, either in the new condition, or after the specified tests.
Type 1 controls are therefore intended to be used in applications where the controlled
temperature is not critical, in terms of performance or safety of the controlled equipment.
A type 2 control is tested for inherent safety and for consistency of operating temperature,
both in new condition, to check that the operating temperature is within the manufacturers’
declared manufacturing tolerance (manufacturing deviation), and also for the change in
operating temperature (drift) after the specified tests.
Add the following new subclauses:
EE.3.17 Definitions of type of control according to construction
electronic control
a control which incorporates at least one electronic device
EE.3.18 Definitions relating to classes of control functions
For the evaluation of protective measures for fault tolerance and avoidance of hazards, it is
necessary to classify control functions with regard to their fault behaviour.
At the classification of control functions, their integration into the complete safety concept of
the appliance shall be taken into account.
NOTE A control function consists of the entire loop beginning with the sensing means through the processing
circuitry (hardware and software if used) and including the actuator drive.
For the purpose of evaluating the design of a control function, present requirements recognise
three distinct classes:
a) class A control function
control functions which are not intended to be relied upon for the safety of the application
NOTE 1 Examples are: room thermostats, temperature control.
b) class B control function
control functions which are intended to prevent an unsafe state of the appliance
NOTE 1 Failure of the control function will not lead directly to a hazardous situation.
NOTE 2 Examples are: thermal limiter, pressure limiter.
c) class C control function
control functions which are intended to prevent special hazards such as explosion or whose
failure could directly cause a hazard in the appliance
NOTE 1 Examples include thermal cut-outs for closed water systems (without vent protection).
Table EE.1 – Typical examples of the classification of temperature sensing controls in
accordance with IEC 60730-2-9
Replace the existing table by the following:

© IEC 2018
Table EE.1 – Typical examples of the classification of temperature
sensing controls in accordance with IEC 60730-2-9
Declaration/ Control applications
Actions
TRH MTC TC TL ART MTC TC TC TC TCT TCF TC TC
RH EK EK CSH SH RC RH HD WH SP
Type 1 X  X
Type 2 X X X X X X X X X X X
A  X
B X X X X X X X X X X X
C X  X
Y      X X
D X  X
E
F X X
G   X
H X
J
K X
L X X
M X
N
P X
X
Z
AK
AM
Class A x  X
control
c
function
a
Class B X X X X X X X X X X X
control
c
function
b
Class C      X
control
c
function
b
Electronic FF FF FF FF FF FF FF FF FF SF FF
circuit faults
a
FF
with regard to
functional
safety
– 8 – IEC 60730-2-9:2015/AMD1:2018
© IEC 2018
Control application codes:
Control application Code
Thermostat in room heaters TRH
Manual reset thermal cut-out in room heaters (small) MTCRH
Thermal cut-out for electric kettles TCEK
Temperature limiter in electric kettles TLEK
Auto reset thermal cut-out in space heaters (dwelling) ARTCSH
Manual reset thermal cut-out in space heaters MTCSH
Thermal cut-out for refrigerator compressor control (for thermal motor protector, refer to TCRC
IEC 60730-2-22)
Thermal cut-out for room heaters TCRH
Thermal cut-out for hair dryers TCHD
Thermal cut-out for transformers TCT
Thermal cut-out for fans TCF
Thermal cut-out for water heaters TCWH
Thermal cut-out for spa applications TCSP
a
First fault applies to non-closed water heater applications
b
First and second fault applies to closed water heater applications.
c
Control functions generally apply to electronic controls.
Component fault code:
Component fault Code
First fault FF
First and second fault SF
Add the following new Clause EE.5:
EE.5 Examples of controls used with domestic appliances
EE.5.1 General usage of controls in appliances
See Figure EE.8 for a typical representation of controls evaluated to IEC 60730-2-9 used in
appliances.
© IEC 2018
Thermostat.
Evaporator
Evaporator fan
Thermal cut out
Motor protector
Controller
Compressor
thermostat
Thermal cut out
Condenser fan
Overload protector
Thermal cut out
Non-self resetting
Motor protector
High temperature
Condenser
switch
Safety switch and
indicator of
condenser blockage
Protective device
Discharge pipe
Safety mechanical switch
High pressure cut out
IEC
Protective device
Figure EE.8 – Schematic diagram showing usage of various
controls approved to IEC 60730-2-9
EE.5.2 Examples of which device is expected to operate during the tests of Clauses 11
and 19 of IEC 60335 (all parts)
Table EE.2 provides examples of applications where the controls are expected to operate
during the tests of Clauses 11 and 19 of IEC 60335 (all parts)

– 10 – IEC 60730-2-9:2015/AMD1:2018
© IEC 2018
Table EE.2 – Examples of controls expected to operate
during Clauses 11 and 19 of IEC 60335 (all parts)
Iron IEC 60335-2-3 Thermostat operates (cycles) during the test of normal operation tests of
Clause 11.
SOD / thermal fuse / current fuse operate during the abnormal operation tests
of Clause 19
Washing machine IEC 60335-2-7 Thermostat operates / cycles during the test of normal operation tests of
Clause 11.
SOD / thermal fuse / current fuse operate during the abnormal operation tests
of Clause 19
Toaster IEC 60335-2-9 Temperature limiter / thermostat operate during the test of normal
operation tests of Clause 11.
Thermal cut-out / SOD / thermal fuse / current fuse operate during the
abnormal operation tests of Clause 19
Kettle IEC 60335-2-15 Temperature limiter / thermostat operate during the test of normal
operation tests of Clause 11.
Thermal cut-out / SOD / thermal fuse / current fuse operate during the
abnormal operation tests of Clause 19
Electric blanket IEC 60335-2-17 Temperature limiter / thermostat operate during the test of normal
operation tests of Clause 11.
Thermal cut-out / SOD / thermal fuse / current fuse operate during the
abnormal operation tests of Clause 19
Skin or hair care IEC 60335-2-23 Temperature limiter / thermostat operate during the test of normal
operation tests of Clause 11.
SOD / thermal fuse / current fuse operate during the abnormal operation tests
of Clause 19
Battery chargers IEC 60335-2-29 Temperature limiter / thermostat operate during the test of normal
operation tests of Clause 11.
Thermal cut-out / SOD / thermal fuse / current fuse operate during the
abnormal operation tests of Clause 19
Panel heater IEC 60335-2-30 Thermostat operates during the test of normal operation tests of Clause 11.
Thermal cut-out / SOD / thermal fuse / current fuse operate during the
abnormal operation tests of Clause 19

Table EE.3 provides a correlation between the various part 2 standards of IEC 60335 to the
type of action and functionality of various controls used in the particular products.

© IEC 2018
Table EE.3 – Guidance on the common usage of types of control
Product Standard Temperature Thermostat Thermal cut-out Voltage Thermal cut-out SOD Further
limiter (auto reset) maintained (manual reset) classification of
type of action
Thermal cut-out
Minimum type of - Type 1 Type 1 Type 2 Type 2 Type 2 Type 2 -
control action
specified
Minimum class of Class A Class A Class B Class B Class B Class B
control function
required for
equivalent
electronic control
IEC 60335-1 Operating Operating Clause 19 Clause 19 Clause 19 Clause 19
Appliances
(See Note) (See Note) (See Note) (See Note)
IEC 60335-2-2  Clause 19 Clause 19 Clause 19 Clause 19 -
Vacuum cleaners
(See Note) (See Note) (See Note) (See Note)
IEC 60335-2-3 Operating Clause 19 Clause 19 Clause 19 -
Electric irons
(See Note) (See Note) (See Note)
IEC 60335-2-4  Clause 19 Clause 19 Clause 19 Clause 19
Spin extractors
(See Note) (See Note) (See Note) (See Note)
Dishwashers IEC 60335-2-5 Operating Clause 19  Clause 19
Stationary IEC 60335-2-6 Operating Operating Clause 19 Clause 19 Clause 19
cooking ranges
Washing IEC 60335-2-7 Operating Clause 19 Clause 19 Clause 19
machines
Shavers IEC 60335-2-8   Clause 19
Grills and IEC 60335-2-9 Operating Operating Clause 19 Clause 19 Clause 19
toasters
Tumble dryers IEC 60335-2-11 Operating Clause 19 Clause 19 Clause 19
Deep fat fryers IEC 60335-2-13 Operating Clause 19 X X
Kitchen machines IEC 60335-2-14 Operating Clause 19 X X

– 12 – IEC 60730-2-9:2015/AMD1:2018
© IEC 2018
Product Standard Temperature Thermostat Thermal cut-out Voltage Thermal cut-out SOD Further
limiter (auto reset) maintained (manual reset) classification of
type of action
Thermal cut-out
Minimum type of - Type 1 Type 1 Type 2 Type 2 Type 2 Type 2 -
control action
specified
Minimum class of Class A Class A Class B Class B Class B Class B
control function
required for
equivalent
electronic control
Appliances for IEC 60335-2-15 Operating Operating Subclause 19.4  Clause 19
heating liquids
TCEK
TLEK
Food waste IEC 60335-2-16   Clause 19 Clause 19
disposers
Electric blankets IEC 60335-2-17 Operating Operating  Clause 19 Clause 19
IEC 60335-2-21 Operating  Clause 19 Clause 19
Storage water
heaters
Class C
Appliances for IEC 60335-2-23 Operating Operating  Clause 19
skin or hair care
Refrigerating IEC 60335-2-24 Operating Clause 19 Clause 19 Clause 19
appliances
Microwave ovens IEC 60335-2-25  Clause 19  Clause 19
Battery chargers IEC 60335-2-29 Operating Operating Clause 19 Clause 19 Clause 19
Room heaters IEC 60335-2-30 Operating Clause 19 Clause 19 Clause 19 Clause 19
TRH
MTCRH
Motor IEC 60335-2-34  Clause 19  X
compressors
Instantaneous IEC 60335-2-35 Clause 19 Clause 19 Clause 19 Clause 19
water heaters
Pumps IEC 60335-2-41  Clause 19 Clause 19 Clause 19

© IEC 2018
Product Standard Temperature Thermostat Thermal cut-out Voltage Thermal cut-out SOD Further
limiter (auto reset) maintained (manual reset) classification of
type of action
Thermal cut-out
Minimum type of - Type 1 Type 1 Type 2 Type 2 Type 2 Type 2 -
control action
specified
Minimum class of Class A Class A Class B Class B Class B Class B
control function
required for
equivalent
electronic control
Thermal storage IEC 60335-2-61 Clause 19 Clause 19 Clause 19 Clause 19
heaters
Fixed immersion IEC 60335-2-73 Clause 19  Clause 19 Clause 19
heaters
Vending IEC 60335-2-75 Operating Clause 19 Clause 19 Clause 19
machines
Ventilating fans IEC 60335-2-80  Clause 19  Clause 19
Commercial IEC 60335-2-89 Operating Clause 19 Clause 19 Clause 19
refrigerating
appliance
NOTE Clause numbers refer to when the control is required to operate during the tests of IEC 60335 (all parts). In some applications, a thermal fuse, current fuse or intentionally
weak part is also used as an equivalent method of protection.

– 14 – IEC 60730-2-9:2015/AMD1:2018
© IEC 2018
Bibliography
Add the following documents to the existing list:
IEC 60335-2-2, Household and similar electrical appliances – Safety – Part 2-2: Particular
requirements for vacuum cleaners and water-suction cleaning appliances
IEC 60335-2-3, Household and similar electrical appliances – Safety – Part 2-3: Particular
requirements for electric irons
IEC 60335-2-4, Household and similar electrical appliances – Safety – Part 2-4: Particular
requirements for spin extractors
IEC 60335-2-5, Household and similar electrical appliances – Safety – Part 2-5: Particular
requirements for dishwashers
IEC 60335-2-6, Household and similar electrical appliances – Safety – Part 2-6: Particular
requirements for stationary cooking ranges, hobs, ovens and similar appliances
IEC 60335-2-7, Household and similar electrical appliances – Safety – Part 2-7: Particular
requirements for washing machines
IEC 60335-2-8, Household and similar electrical appliances – Safety – Part 2-8: Particular
requirements for shavers, hair clippers and similar appliances
IEC 60335-2-9, Household and similar electrical appliances – Safety – Part 2-9: Particular
requirements for grills, toasters and similar portable cooking appliances
IEC 60335-2-11, Household and similar electrical appliances – Safety – Part 2-11:Particular
requirements for tumble dryers
IEC 60335-2-13, Household and similar electrical appliances – Safety – Part 2-13: Particular
requirements for deep fat fryers, frying pans and similarappliances
IEC 60335-2-14, Household and similar electrical appliances – Safety – Part 2-14: Particular
requirements for kitchen machines
IEC 60335-2-15, Household and similar electrical appliances – Safety – Part 2-15: Particular
requirements for appliances for heating liquids
IEC 60335-2-16, Household and similar electrical appliances – Safety – Part 2-16: Particular
requirements for food waste disposers
IEC 60335-2-17, Household and similar electrical appliances – Safety – Part 2-17: Particular
requirements for blankets, pads, clothing and similar flexible heating appliances
IEC 60335-2-21, Household and similar electrical appliances – Safety – Part 2-21: Particular
requirements for storage water heaters
IEC 60335-2-23, Household and similar electrical appliances – Safety – Part 2-23: Particular
requirements for appliances for skin or hair care
IEC 60335-2-24, Household and similar electrical appliances – Safety – Part 2-24: Particular
requirements for refrigerating appliances, ice-cream appliances and ice makers

© IEC 2018
IEC 60335-2-25, Household and similar electrical appliances – Safety – Part 2-25: Particular
requirements for microwave ovens, including combinationmicrowave ovens
IEC 60335-2-29, Household and similar electrical appliances – Safety – Part 2-29: Particular
requirements for battery chargers
IEC 60335-2-30, Household and similar electrical appliances – Safety – Part 2-30: Particular
requirements for room heaters
IEC 60335-2-34, Household and similar electrical appliances – Safety – Part 2-34: Particular
requirements for motor-compressors
IEC 60335-2-35, Household and similar electrical appliances – Safety – Part 2-35: Particular
requirements for instantaneous water heaters
IEC 60335-2-41, Household and similar electrical appliances – Safety – Part 2-41: Particular
requirements for pumps
IEC 60335-2-61, Household and similar electrical appliances – Safety – Part 2-61: Particular
requirements for thermal storage room heaters
IEC 60335-2-73, Household and similar electrical appliances – Safety – Part 2-73: Particular
requirements for fixed immersion heaters
IEC 60335-2-75, Household and similar electrical appliances – Safety – Part 2-75: Particular
requirements for commercial dispensing appliances and vending machines
IEC 60335-2-80, Household and similar electrical appliances – Safety – Part 2-80: Particular
requirements for fans
IEC 60335-2-89, Household and similar electrical appliances – Safety – Part 2-89: Particular
requirements for commercial refrigerating appliances withan incorporated or remote
refrigerant unit or compressor
IEC 60730-2-22, Automatic electrical controls – Part 2-22: Particular requirements for thermal
motor protectors
___________
– 16 – IEC 60730-2-9:2015/AMD1:2018
© IEC 2018
AVANT-PROPOS
Le présent amendement a été établi par le comité d'études 72 de l’IEC: Commandes électriques
automatiques.
La présente version bilingue (2020-06) correspond à la version anglaise monolingue publiée en
2018-01.
La version française de cet amendement n'a pas été soumise au vote.
Le comité a décidé que le contenu de cet amendement et de la publication de base ne sera pas
modifié avant la date de stabilité indiquée sur le site web de l’IEC sous "http://webstore.iec.ch"
dans les données relatives à la publication recherchée. À cette date, la publication sera
• reconduite,
• supprimée,
• remplacée par une édition révisée, ou
• amendée.
IMPORTANT – Le logo "colour inside" qui se trouve sur la page de couverture de cette
publication indique qu'elle contient des couleurs qui sont considérées comme utiles à
une bonne compréhension de son contenu. Les utilisateurs devraient, par conséquent,
imprimer ce document en utilisant une imprimante couleur.
_____________
Tableau 1 – Information requise et méthodes pour fournir les informations
Remplacer la Note 102 existante par la suivante:
En Chine, l’utilisation du métal liquide dans ou avec des matériels de cuisson ou traitant de la nourriture n’est pas
autorisée.
Au Canada, les parties des dispositifs de commande contenant du mercure ne sont pas autorisées.
Annexe EE – Guide pour l’utilisation des dispositifs de commande
thermosensibles relevant du domaine d’application de l’IEC 60730-2-9
EE.1.2 Présentation
Remplacer le troisième alinéa par le suivant:
Les dispositifs de commande classés en type 2 sont aussi évalués afin de fournir un niveau de
confiance en matière de température de fonctionnement. Des essais sont réalisés afin de
déterminer que la plage de températures de fonctionnement pour une condition nouvelle est
bien comprise dans la valeur déclarée par le fabricant, et aussi de déterminer que la dérive de
la température de fonctionnement est bien comprise dans la valeur déclarée par le fabricant
une fois les essais spécifiés réalisés.

© IEC 2018
NOTE Un dispositif de commande thermosensible peut être classé selon plusieurs usages, en fonction de
l’application.
EE.3.3 Types de dispositifs de commande thermosensibles selon leurs fonctions
Remplacer le texte existant de ce paragraphe par le suivant:
EE.3.3.1 Thermostat
Dispositif de commande thermosensible, à action cyclique, destiné à maintenir la
température entre deux valeurs particulières dans les conditions de fonctionnement normal de
l'équipement commandé et pour lequel un réglage par l'utilisateur peut être prévu. Un
thermostat est de ce fait classé aussi comme un dispositif de commande de fonctionnement
avec au moins une action de type 1 (dispositif de commande électromécanique) ou au moins
une fonction de commande de classe A (dispositif de commande électronique). Un usage type
des thermostats consiste à réguler la température de fonctionnement normal d’un appareil de
chauffage des locaux ou d’une plaque chauffante.
Les thermostats sont définis dans l’IEC 60335-1 comme suit:
thermostat
dispositif sensible à la température, dont la température de fonctionnement peut être soit fixée
soit réglable et qui, dans les conditions de fonctionnement normal, maintient la température
de la partie commandée entre certaines limites par l'ouverture et la fermeture automatiques
d'un circuit
EE.3.3.2 Limiteur de température
Dispositif de commande thermosensible destiné à maintenir une température en dessous ou
au-dessus d'une valeur particulière dans les conditions de fonctionnement normal de
l'équipement commandé et pour lequel un réglage par l'utilisateur peut être prévu. Un limiteur
de température est de ce fait classé aussi comme un dispositif de commande de
fonctionnement avec des fonctions de commande de classe A. Dans certaines applications,
un limiteur de température peut être classé comme un dispositif de commande de
fonctionnement avec des fonctions de commande de classe B. Un usage type d’un limiteur
de température avec une fonction de classe A consiste à couper une bouilloire.
Un limiteur de température peut être de type à réarmement automatique ou à réarmement
manuel. Il n'effectue pas l'opération inverse pendant le cycle normal de fonctionnement de
l'appareil.
Les limiteurs de température sont définis dans l’IEC 60335-1 comme suit:
limiteur de température
dispositif sensible à la température, dont la température de fonctionnement peut être soit fixée
soit réglable et qui, dans les conditions de fonctionnement normal, fonctionne par ouverture
ou fermeture d'un circuit quand la température de la partie commandée atteint une valeur
préalablement déterminée
NOTE 1 Un limiteur de température n'effectue pas l'opération inverse lors du cycle normal de l'appareil. Il peut
exiger un réarmement manuel.
NOTE 2 Un limiteur de température sert à limiter la température d’une partie de l’appareil/équipement lors du
fonctionnement normal de l’appareil. La différentielle entre la température de fonctionnement et la température de
refermeture d’un limiteur de température est significative.
NOTE 3 Un limiteur de température électromécanique peut être un dispositif de commande soit de type 1 soit de
type 2 en fonction de l’application.
NOTE 4 Un limiteur de température électronique est classé comme un dispositif de commande de
fonctionnement avec des fonctions de commande de classe A. Dans certaines applications, un limiteur de
température peut être classé comme un dispositif de commande de fonctionnement avec des fonctions de
commande de classe B.
– 18 – IEC 60730-2-9:2015/AMD1:2018
© IEC 2018
EE.3.3.3 Coupe-circuit thermique
Dispositif de commande thermosensible destiné à maintenir une température en dessous ou
au-dessus d'une valeur particulière dans les conditions de fonctionnement anormal de
l'équipement commandé et pour lequel un réglage par l'utilisateur n'est pas prévu. Un coupe-
circuit thermique est de ce fait classé aussi comme un dispositif de commande de protection
avec une action de type 2 (dispositif de commande électromécanique) ou au moins une fonction
de commande de classe B (dispositif de commande électronique). Dans certaines applications,
un coupe-circuit thermique électronique peut être classé comme un dispositif de commande
de protection avec des fonctions de commande de classe C, par exemple les chauffe-eau. Un
usage type des coupe-circuits thermiques consiste à assurer la protection contre les
échauffements excessifs d’un appareil de chauffage des locaux, d’une plaque chauffante ou
d’un chauffe-eau.
Un coupe-circuit thermique peut être de type à réarmement automatique ou à réarmement
manuel.
Les coupe-circuits thermiques sont définis dans l’IEC 60335-1 comme suit:
a) coupe-circuit thermique
dispositif qui, en fonctionnement anormal, limite la température de la partie commandée par
l'ouverture automatique du circuit ou par réduction du courant, et qui est construit de façon telle
que son réglage ne puisse pas être modifié par l'usager
NOTE 1 Un coupe-circuit thermique ne fonctionne pas lors du fonctionnement normal de l’appareil. Il sert à
réguler ou limiter la température de la partie de l’appareil/équipement dans des conditions de défaut.
NOTE 2 Lorsqu’un coupe-circuit thermique est incorporé à ou monté sur un moteur et est spécialement prévu
pour protéger le moteur contre les échauffements excessifs dus à un fonctionnement en surcharge et à une
défaillance au démarrage, et conduit le courant du moteur et est sensible à la température et au courant du moteur,
il s’agit d’un protecteur thermique. Les protecteurs thermiques relèvent du domaine d’application de
l’IEC 60730-2-22.
b) coupe-circuit thermique à réarmement automatique
coupe-circuit thermique qui rétablit automatiquement le courant lorsque la partie
correspondante de l'appareil s'est suffisamment refroidie
NOTE 1 Un coupe-circuit thermique à réarmement automatique ne fonctionne pas lors du fonctionnement
normal de l’appareil. Il sert à réguler la température de la partie de l’appareil/équipement dans des conditions de
défaut.
NOTE 2 Un coupe-circuit thermique à réarmement automatique est généralement un dispositif de commande
de type 2 reposant sur l’application, et le nombre de cycles déclaré est compris entre 300 et 10 000 (selon
l’application du produit final).
c) coupe-circuit thermique sans réarmement automatique
coupe-circuit thermique qui nécessite une opération manuelle, ou le remplacement d'un
élément, pour rétablir le courant
NOTE 1 Une opération manuelle inclut la déconnexion de l’appareil du réseau d’alimentation.
NOTE 2 Un coupe-circuit thermique sans réarmement automatique ne fonctionne pas lors du fonctionnement
normal de l’appareil. Il sert à limiter la température de la partie de l’appareil/équipement dans des conditions de
défaut, et peut déconnecter l’appareil du réseau d’alimentation.
NOTE 3 Un coupe-circuit thermique sans réarmement automatique est généralement un dispositif de
commande de type 2 qui assure soit la microcoupure soit la coupure totale. Le nombre de cycles de fonctionnement
probable déclaré est d’au moins 30.
Le coupe-circuit thermique suivant n’est pas spécialement défini dans l’IEC 60335 mais peut
être utilisé dans des appareils:
coupe-circuit thermique maintenu par tension
coupe-circuit thermique qui est maintenu dans ses conditions de fonctionnement par la
tension qui apparaît à ses bornes dans ces conditions

© IEC 2018
NOTE 1 Un coupe-circuit thermique maintenu par tension ne peut être réarmé que si l’appareil est déconnecté
du réseau d’alimentation.
NOTE 2 Un coupe-circuit thermique maintenu par tension ne fonctionne pas lors du fonctionnement normal de
l’appareil. Il sert à limiter la température de la partie de l’appareil/équipement dans des conditions de défaut, et p
...