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IEC TS 63117
Edition 1.0 2021-10
TECHNICAL
SPECIFICATION
General requirements for lighting systems – Safety
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IEC TS 63117
Edition 1.0 2021-10
TECHNICAL
SPECIFICATION
General requirements for lighting systems – Safety
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.120; 29.140.50 ISBN 978-2-8322-1034-8
– 2 – IEC TS 63117:2021 © IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General . 8
5 Classification of lighting system network . 9
6 Electrical safety . 9
6.1 Protection against hazards in the system products . 9
6.2 Protection against network overvoltage and leakage current . 9
6.2.1 Lighting system based on an ICT network . 9
6.2.2 Lighting system using an HBES/BACS network . 10
6.2.3 Lighting system based on a specific network . 10
7 Functional safety . 14
7.1 General requirements . 14
7.2 Restart after power restoration . 15
7.3 Reasonably foreseeable misuse . 15
7.3.1 Accidental download . 15
7.3.2 Proper configuration . 15
7.4 Software and communication . 15
7.5 Remote operation . 16
Bibliography . 17
Figure 1 – Example of summation of network interface leakage current in a lighting
system . 11
Figure 2 – Illustration of lighting system network with reference to earth . 12
Figure 3 – Measuring network of Σ(I ) . 13
A
Figure 4 – Illustration of lighting system network without reference to earth . 13
Table 1 – Insulation requirements . 10
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GENERAL REQUIREMENTS FOR LIGHTING SYSTEMS – SAFETY
FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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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.
IEC TS 63117 has been prepared by IEC technical committee 34: Lighting. It is a Technical
Specification.
The text of this Technical Specification is based on the following documents:
Draft Report on voting
34/809/DTS 34/840/RVDTS
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Specification is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at /members_experts/refdocs. The main document types developed by IEC are
described in greater detail at /standardsdev/publications.
– 4 – IEC TS 63117:2021 © IEC 2021
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
Lighting systems are becoming more common, not only to save energy but also to improve
human well-being.
These systems are often comprised of many different products (luminaires, sensors, controllers,
touch panels and other human interfaces, etc.) which are connected through communication
cabling or wirelessly, where the light output can be varied based on the input from sensors or
users.
This safety document is intended to cover those safety aspects that are specific to a lighting
system and are not covered by existing standards. This document does not address safety
aspects that are already covered in:
• product safety standards,
• installation safety standards.
IEC Guide 110 gives guidance on determining which electrical safety aspects of systems should
be covered. Products that are considered safe, according to the relevant product safety
standard, need to remain safe when connected to a network. The products need to remain safe
under normal, abnormal and single fault conditions of any product connected to the lighting
network.
For this purpose, the following electrical safety aspects are mentioned in IEC Guide 110:
1) protection from overvoltages on the network;
2) protection from hazards caused by connection of different types of circuits;
3) limitation of network interface leakage current;
4) protection from overheating of the communication network.
By correctly classifying a network, and by applying the required electrical insulation between
different types of circuits, a manufacturer of products can design products to be safely
connected to such a network.
Since it is not clear how many products will be connected to a network, due to the fact that
lighting systems are often tailor-made, the designer of the lighting system is responsible for
ensuring that the accumulated network interface leakage current from all products connected
to the network does not exceed an acceptable limit. For the system designer it is therefore
important that the product individual network touch current is specified in product
documentation, and that system limits are given in a system publication. This document
provides system network interface leakage current limits for different types of networks.
Communication networks can also be used for limited powering. The currents in these cables
are not known to the installer, since they depend on the products used in the system as specified
by the person designing the system. So, the person responsible for system design needs to
take measures specified in system safety publications in order to avoid overheating of this
cabling.
Functional safety is part of the overall safety that depends on functional and physical units
operating correctly in response to their inputs. This document also covers functional safety
aspects at the system level. For lighting systems, functional safety is normally related to
communication errors, incorrect software (response), or foreseeable misuse. This document
assists system designers in assessing the product characteristics for their inclusion in a system.
Lighting systems are not always considered to be associated with functional safety unless the
light properties are relevant for the safety of the installation and surroundings. For example, in
a tunnel, an inappropriate light level after power restoration can cause a safety issue.
– 6 – IEC TS 63117:2021 © IEC 2021
GENERAL REQUIREMENTS FOR LIGHTING SYSTEMS – SAFETY
1 Scope
This document specifies the safety requirements of lighting systems at the system
...