CEN/TS 17951:2024

SLOVENSKI STANDARD
01-november-2024
Uporaba razsvetljave - Prilagodljivi sistemi varnostne razsvetljave
Lighting Applications - Adaptive Emergency Escape Lighting Systems
Angewandte Lichttechnik - Adaptive Sicherheitsbeleuchtungsanlagen
Éclairagisme - Systèmes d'éclairage de sécurité adaptatifs
Ta slovenski standard je istoveten z: CEN/TS 17951:2024
ICS:
01.080.10 Simboli za javno obveščanje. Public information symbols.
Znaki. Table. Označbe Signs. Plates. Labels
91.160.10 Notranja razsvetljava Interior lighting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TS 17951
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
June 2024
TECHNISCHE SPEZIFIKATION
ICS 01.080.10; 91.160.10
English Version
Lighting Applications - Adaptive Emergency Escape
Lighting Systems
Éclairagisme - Systèmes d'éclairage de sécurité Angewandte Lichttechnik - Adaptive
adaptatifs Sicherheitsbeleuchtungsanlagen
This Technical Specification (CEN/TS) was approved by CEN on 8 January 2024 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 17951:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Operation of adaptive emergency lighting system . 10
4.1 Parameters to be controlled . 10
4.2 Sign comprehensibility and conspicuity . 12
4.3 Emergency Escape route signage . 13
4.3.1 General. 13
4.3.2 Sign design and signage system . 13
4.3.3 Sign behaviour . 14
4.4 Emergency escape lighting - Change in illumination . 15
4.4.1 Escape route lighting . 15
4.4.2 Open area lighting . 15
4.4.3 Local area lighting . 15
4.4.4 High-risk task area lighting . 15
4.5 Operating Conditions . 16
5 AEELS execution stages . 16
5.1 General. 16
5.2 Design . 17
5.3 Installation . 17
5.4 Commissioning . 17
5.5 Initial verification . 17
5.6 Operation . 17
5.7 Maintenance . 18
5.7.1 General. 18
5.7.2 Monthly verification . 18
5.7.3 Annual verification . 18
Annex A (informative) Example of project execution stages of an Adaptive Emergency Escape
Lighting System . 19
Annex B (informative) Example of formats for closed escape route . 20
Bibliography . 21

European foreword
This document (CEN/TS 17951:2024) has been prepared by Technical Committee CEN/TC 169, “Light
and Lighting”.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Introduction
Emergency lighting is provided for use when the power supply to the normal lighting fails and is therefore
powered from a source independent of that supplying the normal lighting. Whilst the supply to the
normal lighting is present, emergency lighting can operate in non-maintained or in maintained mode.
In particular, the objective of escape route lighting is to assist the safe exit from a location for occupants
by providing appropriate visual conditions and direction finding on escape routes by means of a
combination of luminaires and signs designed to meet predetermined conditions.
Adaptive Emergency Escape Lighting Systems (AEELS) can be used to revise the escape routing and
increase the conspicuity of emergency signage depending upon the location of a particular hazard, by
using directional exit signs that can be controlled to change routing information and to direct occupants
away from an exit route that has become unusable.
Adaptive Emergency Escape Lighting Systems can operate in two ways, where signage is changed at the
start of the evacuation procedure only, or alternatively where the information displayed by the signs can
be changed during the evacuation as circumstances dictate. In this second mode, during an evolving
incident, escape routing can be revised using AEELS by using directional exit signs that can be controlled
to change routing information directing occupants away from an exit route that has become unusable.
To improve the conspicuity of emergency signage AEELS could, for example, introduce a time-varying
component to the sign such as a flashing or sequentially activated directional arrow.
In case of failure of the AEELS control unit making it impossible to provide control signals to the
Emergency Lighting System (ELS), luminaires of the ELS would remain in the last known condition or
revert to the original condition in accordance with the EN 1838 design requirements depending on risk
assessment. It is essential, that in all cases the consistency between all escape signage is preserved.
For the purposes of this technical specification, Adaptive Emergency Escape Lighting Systems are
regarded as a generic term of which there are a number of specific forms, depending upon the
configuration and available system inputs as shown in Figure 1.
Figure 1 — Example of AEELS configuration
1 Scope
This document specifies the lighting and operating requirements for the application of adaptive
emergency escape lighting systems that can interact with management and control systems or be
provided with functionality to modify the operation of emergency escape lighting according to situational
requirements, in terms of luminous flux output, escape directions and the characteristics and meaning of
emergency escape lighting.
The situational requirements can require the involvement and interaction with components and systems
other than emergency escape lighting systems. Requirements for these components or systems are not
part of this document.
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.
EN 1838, Lighting applications - Emergency lighting for buildings
EN 50172, Emergency escape lighting systems
EN 60598-2-22, Luminaires - Part 2-22: Particular requirements - Luminaires for emergency lighting
EN 62034, Automatic test systems for battery powered emergency escape lighting
EN ISO 7010, Graphical symbols - Safety colours and safety signs - Registered safety signs (ISO 7010)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 1838 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at https://www.electropedia.org/
3.1
emergency lighting
lighting provided for use when the power supply to the normal lighting fails
[SOURCE: EN 12665:2024, 3.5.6]
3.2
escape route
designated route used to evacuate, in case of an emergency, to a place of safety
3.3
emergency escape lighting
part of emergency lighting that provides illumination for visibility of the escape route and of safety
signage for fire-fighting and safety equipment and for the guidance and the safety of people leaving a
location to a place of safety or attempting to terminate a potentially hazardous process or situation before
doing so
[SOURCE: EN 12665:2024, 3.5.36]
3.4
adaptive emergency escape lighting
enhanced emergency escape lighting responding to various circumstances or according to predefined
conditions
Note 1 to entry: Emergency escape lighting with fixed/defined illumination level and/or fixed safety sign
information is not considered as adaptive emergency escape lighting
Note 2 to entry: The term “dynamic emergency escape lighting” is used with the similar meaning.
3.5
escape route lighting
part of emergency escape lighting provided to ensure that the escape route can be effectively identified
and safely used when the location is occupied
3.6
open area (anti-panic) lighting
part of emergency escape lighting provided to avoid panic and provide illumination allowing people to
reach a place where an escape route can be identified
3.7
local area lighting
part of emergency lighting that provides illumination for people
...