SIST EN 50491-3:2009
General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) -- Part 3: Electrical safety requirements
General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) -- Part 3: Electrical safety requirements
This European Standard provides the electrical safety requirements for all devices connected to HBES/BACS. This European Standard is applicable to - operator stations and other human system interface devices, - devices for management functions, - control devices, automation stations and application specific controllers, - field devices, - cabling and interconnection of devices. This European Standard covers the following requirements and compliance criteria: - protection from hazards in the device; - protection from overvoltages on the network; - protection from touch current; - protection from hazards caused by different type of circuits; - protection of the communication wiring from overheating caused by excessive current.
Allgemeine Anforderungen an die Elektrische Systemtechnik für Heim und Gebäude (ESHG) und an Systeme der Gebäudeautomation (GA) - Teil 3: Anforderungen an die elektrische Sicherheit
Diese Europäische Norm legt die Anforderungen an die elektrische Sicherheit für alle Geräte, die an ESHG/GA angeschlossen werden, fest. Diese Europäische Norm ist anzuwenden für – Bedienstationen und andere Geräte mit einer Mensch-System-Schnittstelle, – Geräte mit Managementfunktionen, – Steuereinrichtungen, Automatisierungsstationen und anwendungsspezifische Steuer- und Regel-einheiten, – Feldgeräte, – Verkabelung und Geräteverbindungen. Diese Europäische Norm umfasst die folgenden Anforderungen und Prüfmerkmale: – Schutz vor Gefahren im Gerät; – Schutz vor Überspannungen auf dem Netzwerk; – Schutz vor Berührungsstrom; – Schutz vor Gefahren, die durch unterschiedliche Typen von Stromkreisen hervorgerufen werden; – Schutz der Übertragungsverkabelung vor Überhitzung, die durch zu große Ströme hervorgerufen wird.
Exigences générales relatives aux systèmes électroniques pour les foyers domestiques et les bâtiments (HBES) et aux Systèmes de Gestion Technique du Bâtiment (SGTB) -- Partie 3: Exigences de sécurité électrique
Splošne zahteve za stanovanjske in stavbne elektronske sisteme (HBES) in sisteme za nadzor in avtomatizacijo stavb (BACS) - 3. del: Zahteve za električno varnost
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50491-3:2009
01-oktober-2009
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SIST EN 50090-2-2:1998
SIST EN 50090-2-2:1998/A1:2003
SIST EN 50090-2-2:1998/A2:2007
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General requirements for Home and Building Electronic Systems (HBES) and Building
Automation and Control Systems (BACS) -- Part 3: Electrical safety requirements
Allgemeine Anforderungen an die Elektrische Systemtechnik für Heim und Gebäude
(ESHG) und an Systeme der Gebäudeautomation (GA) - Teil 3: Anforderungen an die
elektrische Sicherheit
Exigences générales relatives aux systèmes électroniques pour les foyers domestiques
et les bâtiments (HBES) et aux Systèmes de Gestion Technique du Bâtiment (SGTB) --
Partie 3: Exigences de sécurité électrique
Ta slovenski standard je istoveten z: EN 50491-3:2009
ICS:
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
SIST EN 50491-3:2009 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 50491-3:2009
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SIST EN 50491-3:2009
EUROPEAN STANDARD
EN 50491-3
NORME EUROPÉENNE
July 2009
EUROPÄISCHE NORM
ICS 97.120 Supersedes EN 50090-2-2:1996 + A1:2002 + A2:2007 (partially)
English version
General requirements for Home and Building Electronic Systems (HBES)
and Building Automation and Control Systems (BACS) -
Part 3: Electrical safety requirements
Exigences générales relatives aux Allgemeine Anforderungen
systèmes électroniques pour les foyers an die Elektrische Systemtechnik
domestiques et les bâtiments (HBES) für Heim und Gebäude (ESHG) und an
et aux Systèmes de Gestion Technique Systeme der Gebäudeautomation (GA) -
du Bâtiment (SGTB) - Teil 3: Anforderungen an die elektrische
Partie 3: Exigences de sécurité électrique Sicherheit
This European Standard was approved by CENELEC on 2009-03-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: Avenue Marnix 17, B - 1000 Brussels
© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50491-3:2009 E
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SIST EN 50491-3:2009
EN 50491-3:2009 – 2 –
Foreword
This European Standard was prepared by a joint working group of Technical Committee CENELEC
TC 205, Home and Building Electronic Systems (HBES), and Technical Committee CEN TC 247, Building
Automation, Controls and Building Management.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50491-3 on
2009-03-01.
This European Standard partially supersedes EN 50090-2-2:1996 + corrigendum March 1997 + A1:2002
+ A2:2007.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2010-03-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-03-01
__________
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SIST EN 50491-3:2009
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Contents
Introduction. 4
1 Sc op e . 5
2 Normative references . 5
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 8
4 Classification of HBES/BACS network interfaces . 9
4.1 Telecommunication network . 9
4.2 Dedicated network . 9
5 Safety requirements and compliance criteria . 9
5.1 General . 9
5.2 Classification requirements of installation areas . 9
5.3 Electrical safety requirements . 9
5.4 Installation . 15
Annex A (normative) Special national conditions . 16
Bibliography . 17
Tables
Table 1 - List of standards for electrical safety (informative) . 10
Table 2 - Requirements for connection of devices to a dedicated HBES/BACS network . 11
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SIST EN 50491-3:2009
EN 50491-3:2009 – 4 –
Introduction
This European Standard shall be used for products connected to a home and building automation and
control system (HBES/BACS).
The expression HBES/BACS covers any combination of HBES and/or BACS products including their
separate connected/detachable devices linked together via one or more networks.
This European Standard shall be used in conjunction with relevant product safety standards.
Introductory note
The joint working group CLC/TC 205 – CEN/TC 247 has decided to include this introductory note for a
better understanding of the document.
The background for this European Standard is based on the philosophy that a device considered
electrically safe according to an appropriate product safety standard harmonised under the LVD Directive
also should remain safe when connected to a network. This European Standard specifies in addition to
the specific product standard the electrical safety requirements necessary when a HBES/BACS device
connected to a network shall remain safe under normal and single fault condition of the HBES/BACS
network and in the same time under normal and single fault condition of one or more HBES/BACS
devices connected to the HBES/BACS network. This includes protection from over voltages on the
network, protection from hazards caused by connection of different type of circuits, the limitation of the
touch current to a network and protection of the communication wiring from overheating.
The HBES/BACS network is any interconnection between HBES/BACS products. The HBES/BACS
networks can be either a telecommunication network with interfaces classified according to IEC/TR 62102
or a dedicated network classified as a Mains, ELV, FELV, SELV or PELV circuit.
For HBES/BACS products connected to a telecommunication network the requirements in EN 41003
apply.
For HBES/BACS products connected to a dedicated HBES/BACS network the requirements for the
electrical separation between the device and the network circuit are specified (see Table 2). These
specifications of the electrical separations follow the principle in the basic safety publications EN 60664-1
and EN 61140 together with the installation requirements of HD 60364-4-41. The following compromises
are used:
Impulse overvoltages considerations:
According to the principles of EN 60664-1 the rated impulse voltage for the separation shall be the
highest of either the impulse voltage on the network or the rated impulse voltage of the device circuit to
be connected to the network.
The overvoltages categories considered by EN 60664-1 refer to overvoltages derived directly from the
mains through the power supply
The overvoltages coming from other sources (eg. capacitive couplings) are not specified in EN 60664-1.
EN 60664-1 recommends that technical committees specify overvoltage categories or rated impulse
voltages as appropriate.
For the purpose of this standard, the following impulse voltages have been specified:
• For networks galvanic electrical separated from mains (FELV, SELV or PELV circuit) the impulse
overvoltage coming from the network side of the separation has been limited to 2,5 kV for fixed
installed networks and 1,5 kV for detachable networks.
• For telecommunication networks, particular requirements apply (see 5.3.2.1).
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1 Scope
This European Standard provides the electrical safety requirements for all devices connected to
HBES/BACS.
This European Standard is applicable to
– operator stations and other human system interface devices,
– devices for management functions,
– control devices, automation stations and application specific controllers,
– field devices,
– cabling and interconnection of devices.
This European Standard covers the following requirements and compliance criteria:
– protection from hazards in the device;
– protection from overvoltages on the network;
– protection from touch current;
– protection from hazards caused by different type of circuits;
– protection of the communication wiring from overheating caused by excessive current.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 41003 Particular safety requirements for equipment to be connected to
telecommunication networks and/or a cable distribution system
EN 60664-1:2007 Insulation coordination for equipment within low-voltage systems -
Part 1: Principles, requirements and tests
(IEC 60664-1:2007)
EN 60950-1:2006 Information technology equipment - Safety - Part 1: General requirements
(IEC 60950-1:2005, mod)
EN 60990 Methods of measurement of touch current and protective conductor current
(IEC 60990)
EN 61140:2002 Protection against electric shock - Common aspects for installation and
equipment (IEC 61140:2001)
EN 61180-1 High-voltage test techniques for low-voltage equipment -
Part 1: Definitions, test and procedure requirements (IEC 61180-1)
EN 61180-2 High-voltage test techniques for low-voltage equipment -
Part 2: Test equipment (IEC 61180-2)
CLC/TR 62102 Electrical safety - Classification of interfaces for equipment to be connected
to information and communications technology networks (IEC/TR 62102)
HD 60364-4-41:2007 Low-voltage electrical installations - Part 4-41: Protection for safety -
Protection against electric shock (IEC 60364-4-41:2005, mod.)
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SIST EN 50491-3:2009
EN 50491-3:2009 – 6 –
HD 384.5.523 S2:2001 Electrical installations of buildings - Part 5: Selection and erection of
electrical equipment - Section 523: Current-carrying capacities in wiring
systems (IEC 60364-5-523:1999, mod.)
IEC 60050-195 International Electrotechnical Vocabulary - Part 195: Earthing and protection
against electric shock
IEC 60050-826 International Electrotechnical Vocabulary - Part 826: Electrical installations
IEC 62151:2000 Safety of equipment electrically connected to a telecommunication network
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
Home and Building Automation and Control (HBES/BACS) products
HBES/BACS products are devices intended to be used for control, monitoring, operation or management
of building services and/or home electronic systems which can interact via a communication network
3.1.2
HBES/BACS network
any interconnection between HBES/BACS products used for communication An HBES/BACS network
can carry digital data as well as analogue signals
3.1.3
HBES/BACS system
the expression HBES/BACS covers any combination of HBES/BACS products (including their separate
connected/detachable devices) linked together via one or more HBES/BACS networks. Other names
used such as “home control network“, “home control systems“, “home and building electronic systems“,
“building systems“, “building automation system“ etc. describes types of HBES/BACS system
3.1.4
telecommunication network
metallically terminated transmission medium intended for communication between equipments that may
be located in separate buildings, excluding
– the mains systems for supply, transmission and distribution of electrical power, if used as a
telecommunication transmission medium,
– cable distribution systems,
– SELV circuits connecting units of information technology equipment
NOTE 1 The term TELECOMMUNICATION NETWORK is defined in terms of its functionality, not its electrical characteristics.
A telecommunication network is not itself defined as being either a SELV circuit or a TNV circuit. Only the circuits in the equipment
are so classified.
NOTE 2 A TELECOMMUNICATION NETWORK may be
- publicly or privately owned,
- subject to transient overvoltages due to atmospheric discharges and faults in power distribution systems,
- subject to longitudinal (common mode) voltages induced from nearby power lines or electric traction lines.
NOTE 3 Examples of TELECOMMUNICATION NETWORKS are
- a public switched telephone network,
- a public data network,
- an Integrated Services Digital Network (ISDN),
- a private network with electrical interface characteristics similar to the above.
[EN 60950-1]
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3.1.5
electric shock
physiological effect resulting from an electric current through a human or animal body
[IEV 195-01-04]
3.1.6
basic protection
protection against electric shock under fault-free conditions
[IEV 195-06-01]
3.1.7
fault protection
protection against electric shock under single-fault conditions
[IEV 195-06-02]
3.1.8
mains
nominal voltage up to 230/400 V a.c. for a three-phase system or 230 V a.c. for a single-phase system, or
voltage up to 400 V d.c.
3.1.9
mains circuit
electrical circuit in which the nominal voltage cannot exceed mains voltage under normal conditions
3.1.10
Extra Low Voltage (ELV)
nominal voltage in the electrical installation of buildings according to the voltage band I specified in
IEC 60449
NOTE Voltage band I according to IEC 60449 is a voltage below or equal to 50 V a.c. or 120 V d.c.
3.1.11
Extra Low Voltage (ELV) circuit
electrical circuit in which the nominal voltage cannot exceed ELV under normal conditions
NOTE An ELV circuit is not safe to touch.
3.1.12
Functional Extra Low Voltage (FELV) circuit
electrical circuit in which the nominal voltage cannot exceed ELV under normal conditions
NOTE 1 FELV has simple separation from LV.
NOTE 2 A FELV circuit is not safe to touch and may be connected to protective earth.
3.1.13
Safety Extra Low Voltage (SELV) circuit
electrical circuit in which the nominal voltage cannot exceed ELV
– under normal conditions,
– under single fault conditions, including earth fault in other circuits
NOTE 1 SELV has simple separation from PELV, other SELV systems and earth and protective separation from all other circuits.
NOTE 2 Under normal conditions and single fault conditions in dry location inside a building a SELV circuit with a voltage not
higher than 25 V a.c. or 60 V d.c. is safe to touch.
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SIST EN 50491-3:2009
EN 50491-3:2009 – 8 –
3.1.14
Protective Extra Low Voltage (PELV) circuit
electrical circuit in which the nominal voltage cannot exceed ELV
– under normal conditions,
– under single fault conditions, except earth fault in other circuits
NOTE 1 PELV has protective separation from all circuits other than PELV, SELV or earth.
NOTE 2 PELV circuit is safe to touch within the same equipotential bonding area inside a building under the following conditions:
Under normal and single fault condition in dry locations and with no large contact area with a voltage not higher than 25 V a.c. or
60 V d.c., otherwise not higher than 12 V a.c. or 30 V d.c.
3.1.15
simple separation
separation between circuits or between a circuit and earth by means of basic insulation
3.1.16
protective separation
separation of one electric circuit from another by means of
– double insulation, or
– basic insulation and electrically protective screening (shielding), or
– reinforced insulation
[IEV 195-06-19]
3.1.17
basic insulation
insulation of hazardous-live parts which provides basic protection
[IEV 826-12-14]
3.1.18
double insulation
insulation comprising both basic insulation and supplementary insulation
[IEV 195-06-08]
3.1.19
supplementary insulation
independent insulation applied in addition to basic insulation for fault protection
[IEV 826-12-15]
3.1.20
electrically protective screening
separation of electric circuits or conductors from hazardous-live parts by an electrically protective screen
(shield) connected to the protective-equipotential-bonding system and intended to provide protection
against electric shock
[IEV 195-06-18]
3.1.21
reinforced insulation
insulation of hazardous-live-parts which provides a degree of protection against electric shock equivalent
to double insulation
[IEV 826-12-17]
3.2 Abbreviations
Void.
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4 Classification of HBES/BACS network interfaces
HBES/BACS networks can be based on the following networks.
4.1 Telecommunication network
The classification of interfaces for devices to be connected to information and communication technology
networks given in IEC/TR 62102 applies.
4.2 Dedicated network
The classification of interfaces for devices to be connected to a dedicated network is LV, ELV, FELV,
SELV or PELV circuit.
5 Safety requirements and compliance criteria
This safety part shall be used together with the appropriate safety standard for the device to be part of the
HBES/BACS. See Table 1.
5.1 General
The entire HBES/BACS, media and devices as well as their installation, shall ensure safe operation by
protection against mechanical, chemical, environmental and other hazards and protection against electric
shock, burns and fire during normal use as well as under specified abnormal conditions.
The entire HBES/BACS, media and devices as well as their installation, shall ensure safe operation and
protection against electric shock, burns and fire during normal use as well as under single fault conditions
Compliance is checked by the classifica
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