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TECHNICAL SPECIFICATION CLC/TS 45545-5
SPECIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION August 2004

ICS 13.220.20; 45.060.01
English version
Railway applications –
Fire protection on railway vehicles
Part 5: Fire safety requirements for electrical equipment
including that of trolley buses, track guided buses
and magnetic levitation vehicles

Applications ferroviaires – Bahnanwendungen –
Protection contre les incendies dans les Brandschutz in Schienenfahrzeugen
véhicules ferroviaires Teil 5: Brandschutzanforderungen
Partie 5: Exigences de sécurité incendie an die elektrische Ausrüstung
pour l'équipement électrique, y compris einschließlich der von Oberleitungs-
celui des trolleybus, des autobus guidés bussen, spurgeführten Bussen und
et des véhicules à sustentation Magnetschwebefahrzeugen
magnétique
This Technical Specification was approved by CENELEC on 2004-03-16.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to
make the TS available promptly at national level in an appropriate form. It is permissible to keep conflicting
national standards in force.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. CLC/TS 45545-5:2004 E

Foreword
This Technical Specification has been prepared by the Joint Working Group "Fire Safety in Railways" of
CEN /TC 256, "Railway Applications" in cooperation with CENELEC/TC 9X "Electrical and electronic
application for railways".
The text of the draft was submitted to the formal vote and was approved by CENELEC as
CLC/TS 45545-5 on 2004-03-16.
The following date was fixed:
– latest date by which the existence of the TS
has to be announced at national level (doa) 2004-10-01
This Technical Specification is part of a series of European Standards "Railway applications – Fire
protection on railway vehicles" which consists of:
 Part 1: General
 Part 2: Requirements for fire behaviour of materials and components
 Part 3: Fire resistance requirements for fire barriers and partitions
 Part 4: Fire safety requirements for railway rolling stock design
 Part 5: Fire safety requirements for electrical equipment including that of trolley buses, track guided
buses and magnetic levitation vehicles
 Part 6: Fire control and management systems
 Part 7: Fire safety requirements for flammable liquid and flammable gas installations

– 3 – CLC/TS 45545-5:2004
Contents
Introduction.4
1 Scope.4
2 Normative references.4
3 Definitions .5
4 Terminology .7
5 General requirements .7
6 Design requirements.7
6.1 Overload protection .7
6.2 Integrity of connection .8
6.3 Wiring.8
6.4 Enclosures.9
6.5 Cable ducts.9
6.6 Batteries and battery supply circuits.10
6.7 Switchgear.10
6.8 Electrical emergency equipment .10
6.9 Bonding .11
6.10 Resistors and heating equipment.11
6.11 Locations exposed to current collection arcing .11
6.12 Forced ventilated equipment (including heating, cooling and air conditioning).11
6.13 Container filled with insulating liquid .11
7 Maintainability.12
7.1 Maintenance requirements.12
7.2 Modification of electrical equipment .12
8 Evaluation of conformity .12
Annex A (informative) Example of a system test for the evaluation of arc barriers and arc
extinguishing devices.13
A.1 Health and safety warning.13
A.2 Scope.14
A.3 Definitions.14
A.4 Key system test parameters.14
A.5 A System test .14
A.6 System test options .17

Introduction
This Technical Specification is based on existing fire safety regulations for railway vehicles from the
International Union of Railways (UIC) and different European countries.
In using the operation and design categories defined in EN 45545-1, the requirements laid down in the
different parts of the EN 45545 will take into account the current operating conditions for European public
rail transport.
1 Scope
This Technical Specification specifies the fire safety requirements for electrical equipment on railway
vehicles, including that of trolley buses, track guided buses and magnetic levitation vehicles.
The measures and requirements, specified in this Technical Specification meet the objective of protecting
passengers and staff in railway vehicles in the event of a fire on board by:
 minimising the risk of starting a fire both during operation and as a result of technical defect and/or
malfunction of the electrical equipment;
 ensuring that electrical emergency equipment continues to be available until evacuation is complete.
It is not within the scope of this Technical Specification to describe measures which ensure the
preservation of the electrical equipment in the event of a fire on board.
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.
1)
EN 45545-1 , Railway applications — Fire protection on railway vehicles — Part 1: General
2)
EN 45545-2 , Railway applications — Fire protection on railway vehicles — Part 2: Requirements for fire
behaviour of materials and components
1)
EN 45545-3 , Railway applications — Fire protection on railway vehicles — Part 3: Fire resistance
requirements for fire barriers and partitions
2)
EN 45545-4 , Railway applications — Fire protection on railway vehicles — Part 4: Fire safety
requirements for railway rolling stock design
2)
EN 45545-6 , Railway applications — Fire protection on railway vehicles — Part 6: Fire control and
management systems
EN 50124-1, Railway applications — Insulation coordination — Part 1: Basic requirements; Clearances
and creepage distances for all electrical and electronic equipment

1)
At draft stage.
2)
In preparation.
– 5 – CLC/TS 45545-5:2004
EN 50125-1, Railway applications — Environmental conditions for equipment — Part 1: Equipment on
board rolling stock
EN 50153, Railway applications — Rolling stock — Protective provisions relating to electrical hazards
EN 60352-1, Solderless connections — Part 1: Wrapped connections — General requirements, test
methods and practical guidance (IEC 60352-1)
EN 60695-1-1, Fire hazard testing — Part 1-1: Guidance for assessing the fire hazard of electrotechnical
products — General guidelines
EN 60695-4, Fire hazard testing — Part 4: Terminology concerning fire tests (IEC 60695-4)
EN 61140, Protection against electric shock — Common aspects for installation and equipment
(IEC 61140)
EN 61210, Connecting devices — Flat quick-connect terminations for electrical copper conductors —
Safety requirements (IEC 61210, modified)
EN ISO 13943, Fire safety — Vocabulary (ISO 13943)
IEC 60050-811, International Electrotechnical vocabulary — Chapter 811: Electric traction
ISO 3261, Fire tests — Vocabulary (Bilingual edition)
ISO 8421-1, Fire protection; Vocabulary; Part 1: General terms and phenomena of fire (Bilingual edition)
3 Definitions
For the purpose of this document, the following definitions apply:
3.1
arc barrier
a device to contain an electrical arc within a prescribed region
3.1.1
arc barrier Type A
device to contain an electrical arc of short duration, resulting from the normal operation of high power
equipment, within a prescribed region
3.1.2
arc barrier Type B
device to contain an electrical arc of potentially long duration, resulting from a failure of high power
equipment, within a prescribed region
3.2
arc splash barrier
device to offer protection against incandescent metal particles arising from making and/or breaking high
power electrical contacts
3.3
enclosure
housing for separating the internal and external environment from the electrical equipment
3.4
electrical equipment
anything used, intended to be used or installed for use, to generate, provide, transmit, transform, rectify,
convert, conduct, distribute, control, store, measure or use electrical energy

3.5 High power circuits
All circuits listed below are high power circuits.
3.5.1
supply line
line between the current collector or current source and the main circuit breaker or main fuse(s) on the
vehicle.
3.5.2
traction circuit
all circuits from main circuit breaker or main fuse(s) carrying the current of the machines and equipment,
such as the convertors and traction motors, which transmit the traction output.
3.5.3 Auxiliary supplies
3.5.3.1
auxiliary circuit
circuit carrying the current of the auxiliaries such as the compressors and fans
[IEV 811-25-05]
3.5.3.2
train power supply
circuit supplying substantial amounts of power to each vehicle of a train for air-conditioning, heating and
other auxiliary services
[IEV 811-25-06]
3.5.3.3
battery supply circuit
circuit carrying the current between the battery and the main battery protective device(s), or the
unprotected part of the starting circuit
3.6 Low power circuits
All circuits except those listed in the definition of high power are low power. For example:
3.6.1
low voltage circuit
circuit carrying current at a voltage significantly less than voltage of the contact line and supplied by a
battery, a converter or a transformer
[IEV 811-25-02]
3.6.2
battery circuit
circuit carrying the current after the battery protective device(s)
3.6.3
starting circuit
specific circuit for starting up an internal combustion engine by its generator as motor or by a separate
3)
starter motor, except the unprotected part
[IEV 811-25-10 - modified]
3.6.4
control circuit
circuit used to actuate the power or au
...