SIST EN IEC 63044-3:2018

SLOVENSKI STANDARD
01-marec-2018
Nadomešča:
SIST EN 50491-3:2009
Stanovanjski in stavbni elektronski sistemi (HBES) in sistemi za nadzor in
avtomatizacijo stavb (BACS) - 3. del: Zahteve za električno varnost
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
Systèmes Electroniques pour les Foyers Domestiques et les Bâtiments (HBES) et
Systèmes de Gestion Technique du Bâtiment (SGTB) - Partie 3: Exigences de sécurité
électrique
Ta slovenski standard je istoveten z: EN IEC 63044-3:2018
ICS:
35.240.67 Uporabniške rešitve IT v IT applications in building
gradbeništvu and construction industry
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 63044-3

NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2018
ICS 29.120.01; 29.120.99 Supersedes EN 50491-3:2009
English Version
Home and Building Electronic Systems (HBES) and Building
Automation and Control Systems (BACS) -
Part 3: Electrical safety requirements
(IEC 63044-3:2017)
Systèmes Electroniques pour les Foyers Domestiques et Allgemeine Anforderungen an die Elektrische
les Bâtiments (HBES) et Systèmes de Gestion Technique Systemtechnik für Heim und Gebäude (ESHG) und an
du Bâtiment (SGTB) - Partie 3: Exigences de sécurité Systeme der Gebäudeautomation (GA) -
électrique Teil 3: Anforderungen an die elektrische Sicherheit
(IEC 63044-3:2017) (IEC 63044-3:2017)
This European Standard was approved by CENELEC on 2017-03-03. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63044-3:2018 E

European foreword
The text of document 23/735/CDV, future edition 1 of IEC 63044-3, prepared by IEC/TC 23 "Electrical
accessories" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
(dop) 2018-07-19
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-01-19
standards conflicting with the
document have to be withdrawn
This document supersedes EN 50491-3:2009.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directive.

For the relationship with EU Directive see informative Annex ZZ, which is an integral part of this
document.
Endorsement notice
The text of the International Standard IEC 63044-3:2017 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60065 NOTE Harmonized as EN 60065.
IEC 60598 Series NOTE Harmonized as EN 60598 Series.
IEC 60669-2-1 NOTE Harmonized as EN 60669-2-1.
IEC 60669-2-5 NOTE Harmonized as EN 60669-2-5.
IEC 60730-1 NOTE Harmonized as EN 60730-1.
IEC 60730-2-11 NOTE Harmonized as EN 60730-2-11.
IEC 60730-2-14 NOTE Harmonized as EN 60730-2-14.
IEC 60950-1:2005 NOTE Harmonized as EN 60950-1:2006 (modified).
IEC 60990 NOTE Harmonized as EN 60990.
IEC 61140 NOTE Harmonized as EN 61140.
IEC 61558 Series NOTE Harmonized as EN 61558 Series.
IEC 61800 Series NOTE Harmonized as EN 61800 Series.
IEC 62040 Series NOTE Harmonized as EN 62040 Series.
IEC 62080 NOTE Harmonized as EN 62080.
IEC 62094-1 NOTE Harmonized as EN 62094-1.
IEC 62368-1 NOTE Harmonized as EN 62368-1.
ISO 16484-2 NOTE Harmonized as EN ISO 16484-2.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu
Publication Year Title EN/HD Year

1)
IEC 60038 (mod) 2009 IEC standard voltages EN 60038 2011
IEC 60364 (mod) Series Low-voltage electrical installations HD 60364 Series
IEC 60364-5-52 -  Low-voltage electrical installations - HD 60364-5-52 2011
(mod) Part 5-52: Selection and erection of
electrical equipment - Wiring systems
IEC 60664-1 2007 Insulation coordination for equipment EN 60664-1 2007
within low-voltage systems -
Part 1: Principles, requirements and tests
IEC 61180 -  High-voltage test techniques for low- EN 61180 2016
voltage equipment - Definitions, test and
procedure requirements, test equipment
IEC 62151 2000 Safety of equipment electrically connected - -
to a telecommunication network
IEC 62949 -  Particular safety requirements for EN 62949 2017
equipment to be connected to information
and communication networks
IEC 63044-1 -  Home and Building Electronic Systems EN 63044-1 2017
(HBES) and Building Automation and
Control Systems (BACS) -
Part 1: General requirements
1)
The title of EN 60038 is "CENELEC standard voltages".
Annex ZZ
(informative)
Relationship between this European standard and the safety objectives
of Directive 2014/35/EU [2014 OJ L96] aimed to be covered

This European standard has been prepared under a Commission’s standardisation request relating to
harmonised standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means
of conforming to safety objectives of Directive 2014/35/EU of the European Parliament and of the
Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the
making available on the market of electrical equipment designed for use within certain voltage limits
[2014 OJ L96].
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZZ.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding safety objectives of
that Directive, and associated EFTA regulations.

Table ZZ.1 – Correspondence between this European standard and Annex I of Directive
2014/35/EU [2014 OJ L96]
Safety objectives of Directive
Clause(s) / sub-clause(s)
Remarks / Notes
2014/35/EU of this EN
1(a) 1, 2, 3, 4, 5 To be used in conjunction with
the appropriate product
standard
1(b) 5 To be used in conjunction with
the appropriate product
standard
1(c) See 2 and 3
2(a) 5, 6 To be used in conjunction with
the appropriate product
standard
2(b) 5, 6.2.4 To be used in conjunction with
the appropriate product
standard
2(c) 5 To be used in conjunction with
the appropriate product
standard
2(d) 5, 6 To be used in conjunction with
the appropriate product
standard
3(a) 5 To be used in conjunction with
the appropriate product
standard
3(b) 5, 6.3 To be used in conjunction with
the appropriate product
standard
3(c) 5, 6.2.4 To be used in conjunction with
the appropriate product
standard
WARNING 1: Presumption of conformity stays valid only as long as a reference to this European
standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2: Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
IEC 63044-3 ®
Edition 1.0 2017-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Home and Building Electronic Systems (HBES) and Building Automation and

Control Systems (BACS) –
Part 3: Electrical safety requirements

Systèmes Electroniques pour les Foyers Domestiques et les Bâtiments (HBES)

et Systèmes de Gestion Technique du Bâtiment (SGTB) –

Partie 3: Exigences de sécurité électrique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.01; 29.120.99 ISBN 978-2-8322-3875-2

– 2 – IEC 63044-3:2017 © IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 10
4 Classification of HBES/BACS network interfaces . 10
4.1 General . 10
4.2 ICT network . 10
4.3 Dedicated network . 10
5 Safety requirements and compliance criteria. 10
6 Requirements . 10
6.1 General . 10
6.2 Classification requirements of installation areas . 11
6.2.1 Overvoltage category . 11
6.2.2 Pollution degree . 11
6.3 Electrical safety requirements . 11
6.3.1 Protection from hazards in the device . 11
6.3.2 Protection from overvoltage on the network and from hazards caused by
different types of circuit . 11
6.3.3 Protection from touch current . 13
6.3.4 Protection of the communication wiring from overheating . 15
6.4 Installation . 15
Annex A (informative) List of product standards for electrical safety . 16
Bibliography . 18

Table 1 – Requirements for connection of devices to a dedicated HBES/BACS network. 12

IEC 63044-3:2017 © IEC 2017 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOME AND BUILDING ELECTRONIC SYSTEMS (HBES) AND
BUILDING AUTOMATION AND CONTROL SYSTEMS (BACS) –

Part 3: Electrical safety requirements

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 63044-3 has been prepared by IEC technical committee 23:
Electrical accessories.
A list of all parts in the IEC 63044 series, published under the general title Home and Building
Electronic Systems (HBES) and Building Automation Control Systems (BACS), can be found
on the IEC website.
The text of this standard is based on the following documents:
CDV Report on voting
23/735/CDV 23/747/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

– 4 – IEC 63044-3:2017 © IEC 2017
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
In this publication, the following print types are used:
– Requirements proper: in roman type.
– Test specifications: in italic type.
This document shall be used in conjunction with relevant product safety standards.
The committee has decided that the contents of this 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.
IEC 63044-3:2017 © IEC 2017 – 5 –
INTRODUCTION
The IEC 63044 series deals with developing and testing Home and Building Electronic
Systems (HBES) and Building Automation and Control Systems (BACS).
This document deals with electrical safety requirements for HBES/BACS.
This document is based on the philosophy that a device considered electrically safe according
to an appropriate product safety standard should also remain safe when connected to a
network. This document specifies in addition to the specific product standard the electrical
safety requirements necessary in order for an HBES/BACS device connected to a network to
remain safe under normal and single-fault conditions of the HBES/BACS network and at the
same time under normal and single-fault conditions of one or more HBES/BACS devices
connected to the HBES/BACS network. This includes protection from overvoltages on the
network, protection from hazards caused by connection of different types of circuit, 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 an ICT network with interfaces classified according to
IEC 62949 or a dedicated network classified as a mains, ELV, FELV, SELV or PELV circuit.
For HBES/BACS products connected to an ICT network, the requirements in IEC 62949 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 1). These specifications of the electrical separations follow the principle in the basic
safety publications IEC 60664-1 and IEC 61140, together with the installation requirements of
IEC 60364. The following compromises are used.
– According to the principles of IEC 60664-1, the rated impulse voltage for the separation
shall be the higher of the impulse voltage on the network and the rated impulse voltage of
the device circuit to be connected to the network.
– The overvoltage categories considered by IEC 60664-1 refer to overvoltages derived
directly from the mains through the power supply.
– The overvoltages coming from other sources (e.g. capacitive couplings) are not specified
in IEC 60664-1. IEC 60664-1 recommends that technical committees specify overvoltage
categories or rated impulse voltages as appropriate.
For the purposes of this document, the following impulse voltages have been specified.
• For networks with galvanic electrical separation 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 ICT networks, particular requirements apply (see 6.3.2.1).

– 6 – IEC 63044-3:2017 © IEC 2017
HOME AND BUILDING ELECTRONIC SYSTEMS (HBES) AND
BUILDING AUTOMATION AND CONTROL SYSTEMS (BACS) –

Part 3: Electrical safety requirements

1 Scope
This part of IEC 63044 provides the electrical safety requirements related to the HBES/BACS
network in addition to the product safety standards for HBES/BACS devices.
It also applies to devices used within an HBES/BACS network for which no specific
HBES/BACS product safety standard exists.
In addition, it defines safety requirements for the interface of equipment intended to be
connected to an HBES/BACS network. It does not apply to interfaces to other networks.
NOTE An example of other networks is a dedicated ICT network covered by IEC 62949.
This document 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 and their interfaces, and
– cabling and interconnection of devices
used within a dedicated HBES/BACS network.
This document 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 types of circuit;
• protection of the communication wiring from overheating caused by excessive current.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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.
IEC 60038:2009, IEC standard voltages
IEC 60364 (all parts), Low-voltage electrical installations
IEC 60364-5-52, Low-voltage electrical installations – Part 5-52: Selection and erection of
electrical equipment – Wiring systems

IEC 63044-3:2017 © IEC 2017 – 7 –
IEC 60664-1, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 61180, High-voltage test techniques for low-voltage equipment –Definitions, test and
procedure requirements, test equipment
IEC 62151:2000, Safety of equipment electrically connected to a telecommunication network
IEC 62949, Particular safety requirements for equipment to be connected to information and
communication networks
IEC 63044-1, Home and Building Electronic Systems (HBES) and Building Automation and
Control Systems (BACS) – Part 1: General requirements
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 63044-1 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
ICT network
information and communication technology network
metallically terminated transmission medium consisting of two conductors intended for
communication between equipment that may be located in separate buildings
...