Railway applications - Rolling stock - Protective provisions relating to electrical hazards

This European Standard defines requirements to be applied in the design and manufacture of electrical installations and equipment to be used on rolling stock to protect persons from electric shocks. This European Standard is applicable to rolling stock of rail transport systems, road transport systems, if they are powered by an external supply (e.g. trolley buses), magnetically levitated transport systems and to the electrical equipment installed in these systems. This European Standard does not apply to: - mine railways in mines, - crane installations, moving platforms and similar transport systems on rails, - funicular railways, temporary constructions.

Bahnanwendungen - Fahrzeuge - Schutzmaßnahmen in Bezug auf elektrische Gefahren

Diese Europäische Norm legt Anforderungen fest, die beim Entwurf und bei der Herstellung elek¬tri¬scher Einrichtungen und Betriebsmittel auf Fahrzeugen anzuwenden sind, um Personen gegen elektrischen Schlag zu schützen. Diese Europäische Norm ist anwendbar für Fahrzeuge des schienengebundenen Verkehrs, elektrisch gespeiste Straßenfahrzeuge (z. B. O-Busse), Magnetschwebebahnen und die elektrischen Betriebsmittel, die auf diesen Fahrzeugen installiert sind. Diese Europäische Norm gilt nicht für: - Grubenbahnen im Untertagebergbau, - Krananlagen, Schiebebühnen und ähnliche Transportsysteme auf Schienen, - Standseilbahnen, - fliegende Bauten.

Applications ferroviaires - Matériel roulant - Mesures de protection vis-à-vis des dangers d'origine électrique

Železniške naprave - Vozna sredstva - Zaščitni ukrepi proti nevarnostim električne napetosti

EN 50153 določa zahteve, ki jih je treba izpolniti pri načrtovanju in proizvodnji električnih naprav in opreme za uporabo na voznih sredstvih za zaščito oseb pred električnim udarom. Ta evropski standard velja za vozna sredstva sistemov železniškega prevoza, sistemov cestnega prevoza, če jih napajajo zunanji napajalniki (npr. trolejbusi), sistemov prevozov na magnetni blazini in za električno opremo, ki je vgrajena v te sisteme. Ta evropski standard se ne uporablja za: - rudniške železnice v rudnikih, - žerjave, premične platforme in podobne tirne prevozne sisteme, - vzpenjače, - začasne konstrukcije.

General Information

Status
Published
Publication Date
01-May-2014
Current Stage
6060 - Document made available
Due Date
02-May-2014
Completion Date
02-May-2014

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SLOVENSKI STANDARD
SIST EN 50153:2014
01-julij-2014

äHOH]QLãNHQDSUDYH9R]QDVUHGVWYD=DãþLWQLXNUHSLSURWLQHYDUQRVWLPHOHNWULþQH

QDSHWRVWL

Railway applications - Rolling stock - Protective provisions relating to electrical hazards

Bahnanwendungen - Fahrzeuge - Schutzmaßnahmen in Bezug auf elektrische Gefahren

Applications ferroviaires - Matériel roulant - Mesures de protection vis-à-vis des dangers

d'origine électrique
Ta slovenski standard je istoveten z: EN 50153:2014
ICS:
13.260 9DUVWYRSUHGHOHNWULþQLP Protection against electric
XGDURP'HORSRGQDSHWRVWMR shock. Live working
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
SIST EN 50153:2014 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50153:2014
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SIST EN 50153:2014
EUROPEAN STANDARD EN 50153
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2014
ICS 45.060.01 Supersedes EN 50153:2002
English Version
Railway applications - Rolling stock - Protective provisions
relating to electrical hazards

Applications ferroviaires - Matériel roulant - Mesures de Bahnanwendungen - Fahrzeuge - Schutzmaßnahmen in

protection vis-à-vis des dangers d'origine électrique Bezug auf elektrische Gefahren

This European Standard was approved by CENELEC on 2014-03-10. 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, 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: Avenue Marnix 17, B-1000 Brussels

© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50153:2014 E
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EN 50153:2014 – 2 –
Contents

Foreword ................................................................................................................................................. 4

Introduction ............................................................................................................................................. 5

1 Scope ............................................................................................................................................... 6

2 Normative references ..................................................................................................................... 6

3 Terms, definitions and abbreviations ........................................................................................... 7

3.1 Terms and definitions ............................................................................................................. 7

3.2 Abbreviations ........................................................................................................................ 10

4 Classification of voltage bands ................................................................................................... 10

4.1 General principles ................................................................................................................. 10

4.2 Connections between circuits ............................................................................................... 11

4.3 Exceptions ............................................................................................................................ 11

5 Protective provisions against direct contact ............................................................................. 12

5.1 General ................................................................................................................................. 12

5.2 Protection by insulation ......................................................................................................... 12

5.3 Protection by prevention of access ....................................................................................... 12

5.4 Protection by the use of band I ............................................................................................. 14

5.5 Warning labels ...................................................................................................................... 15

6 Protective provisions against indirect contact .......................................................................... 15

6.1 General ................................................................................................................................. 15

6.2 Protective bonding ................................................................................................................ 15

6.3 Disconnection of the supply .................................................................................................. 16

6.4 Main protective bonding ........................................................................................................ 16

6.5 Clarifications and exceptions with reference to indirect contact ........................................... 18

6.6 Additional requirements – Bearings ...................................................................................... 19

7 Power circuit ................................................................................................................................. 19

7.1 General principles ................................................................................................................. 19

7.2 Power circuit insulated from the vehicle body or bogie ......................................................... 20

7.3 Power circuit using the vehicle body or bogie ....................................................................... 20

8 Additional requirements ............................................................................................................... 20

8.1 General ................................................................................................................................. 20

8.2 Current collectors.................................................................................................................. 20

8.3 Capacitors ............................................................................................................................. 21

8.4 Plug and socket devices ....................................................................................................... 21

8.5 Special sources .................................................................................................................... 22

Annex A (normative) Special national conditions ............................................................................. 23

Annex B (normative) List of items where contracting parties shall co-operate ............................. 24

Annex C (informative) Proposals for design of main protective connections ............................... 25

C.1 General ................................................................................................................................. 25

C.2 Example for main earth connections .................................................................................... 26

C.3 Examples of technical specification for steel earthing wires................................................. 27

Annex D (informative) Operate over 750 V DC third rail electrified lines in Great Britain ............. 28

D.1 Introduction ........................................................................................................................... 28

D.2 Bonding between rail vehicle main body to bogie ................................................................. 28

D.3 Inter-vehicle bonding ............................................................................................................ 28

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Bibliography .......................................................................................................................................... 29

Figure

Figure C.1 — Earthing wire ................................................................................................................... 26

Tables

Table 1 – Voltage bands ........................................................................................................................ 11

Table 2 — Maximum impedance between each vehicle body of a unit and protective conductor of

the fixed installation ...................................................................................................................... 17

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EN 50153:2014 – 4 –
Foreword

This document (EN 50513:2014) has been prepared by CLC/SC 9XB "Electromechanical material on

board rolling stock" from CLC/TC 9X "Electrical and electronic applications for railways".

The following dates are fixed:
(dop) 2015-03-10
• latest date by which this document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2017-03-10
• latest date by which the national
standards conflicting with this
document have to be withdrawn
This document supersedes EN 50153:2002.

EN 50153:2013 includes the following significant technical changes with respect to EN 50153:2002:

– the document now takes into account EN 50122-1:2011 and UIC leaflet 533:2011;
– other normative references and some definitions have been updated;
– Annex D has been added, Annex C has been changed.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] 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.
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Introduction

It is generally accepted that safety depends on human factors, based on the normal behaviour of the

operators involved, as well as upon technical factors.

For these reasons, this European Standard, in several instances, leaves a choice to the contracting

parties between two alternatives. These alternatives consist of either the provision of operating rules,

regulations and procedures, or in the application of technical measures such as mechanical or

electrical interlocking devices.

A list of the cases for which the contracting parties (e.g. user and manufacturer) should reach

agreement before signing the contract is included in Annex B.
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EN 50153:2014 – 6 –
1 Scope

This European Standard defines requirements to be applied in the design and manufacture of electrical

installations and equipment to be used on rolling stock to protect persons from electric shocks.

This European Standard is applicable to rolling stock of rail transport systems, road transport systems,

if they are powered by an external supply (e.g. trolley buses), magnetically levitated transport systems

and to the electrical equipment installed in these systems.
This European Standard does not apply to:
– mine railways in mines,
– crane installations, moving platforms and similar transport systems on rails,
– funicular railways,
– temporary constructions.
2 Normative references

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.

EN 50122-1:2011 , Railway applications — Fixed installations — Electrical safety, earthing and the

return circuit — Part 1: Protective provisions against electric shock

EN 50124-1, Railway applications –Insulation coordination — Part 1: Basic requirements —

Clearances and creepage distances for all electrical and electronic equipment

EN 50388, Railway applications — Power supply and rolling stock — Technical criteria for the

coordination between power supply (substation) and rolling stock to achieve interoperability

HD 60364-4-41:2007, Low-voltage electrical installations — Part 4-41: Protection for safety —

Protection against electric shock (IEC 60364-4-41:2005, modified)
EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529)

EN 61140, Protection against electric shock — Common aspects for installation and equipment

(IEC 61140)

EN 61310-1, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for

visual, acoustic and tactile signals (IEC 61310-1)

IEC/TS 60479-1, Effects of current on human beings and livestock — Part 1: General aspects

1) This document is currently impacted by the amendment EN 50122-1:2011/A1:2011.
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3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

NOTE For more information relating to definitions of parts of the fixed installations, see EN 50122-1 from which

these definitions are derived.
3.1.1 Definitions concerning persons
3.1.1.1
(electrically) instructed person

person adequately advised or supervised by electrically skilled persons to enable them to perceive

risks and to avoid hazards electricity can create
3.1.1.2
ordinary person
person who is neither a skilled person nor an (electrically) instructed person
3.1.1.3
skilled person

person who can judge the work assigned to him and recognize possible dangers on the basis of their

professional training, knowledge and experience and of their knowledge of the relevant requirements

3.1.2 Other definitions
3.1.2.1
closed electrical operating area

room or location which serves exclusively for the operation of electrical equipment and is kept secure

by a means appropriate to the voltage and location

Note 1 to entry: Access to such areas is permitted only to skilled persons and (electrically) instructed persons.

Note 2 to entry: The definition of closed electrical operating area can be suitable for underfloor or upperroof

cabinets. Generally speaking, it is any location (inside or outside the car body) which is kept secured because of

the voltage that can assumed to be present on the equipment inside it. Access to such areas is not allowed for

ordinary persons.
3.1.2.2
contact line

conductor system for supplying electrical energy to rolling stock systems through current-collecting

equipment
3.1.2.3
contact wire

electric conductor of an overhead contact line with which the current collectors make contact

3.1.2.4
cut-off
supply of electrical energy to live parts is switched off
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3.1.2.5
direct contact
contact of persons or livestock with live parts
3.1.2.6
double insulation
insulation comprising both basic insulation and supplementary insulation
3.1.2.7
earth

conductive mass of the earth, whose electrical potential at any point is conventionally taken as equal to

zero
3.1.2.8
electrical operating area

room or location which serves primarily for the operation of electrical equipment and is normally

entered only by skilled persons or (electrically) instructed persons

Note 1 to entry: Generally speaking, an electrical operating area is any location (mainly inside the car body)

where electrical equipments operate. The above is the main function of this area but not the only one. In fact,

normally the area is not kept secured and protection against direct contact is achieved by other means

(e.g. (electrically) protective obstacles).
3.1.2.9
electric shock

pathophysiological effect resulting from an electric current passing through a human or animal body

3.1.2.10
equipotential bond

electrical connection putting various exposed conductive parts at a substantially equal potential

Note 1 to entry: This can be abbreviated to ‘bond’ or ‘bonding’.
3.1.2.11
exposed conductive part

conductive part of electrical equipment, which can be touched and which is not normally live, but can

become live when basic insulation fails

Note 1 to entry: A conductive part of electrical equipment which can only become live through contact with an

exposed conductive part which has become live is not considered to be an exposed conductive part itself.

3.1.2.12
indirect contact

electric contact of persons or livestock with exposed conductive parts which have become live under

fault conditions
3.1.2.13
interlocking device

device which makes the operation of a switching device dependent upon the position or operation of

one or more other pieces of equipment
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3.1.2.14
interlock system

system incorporating interlocking devices on access points to electrical equipment to prevent

energisation of accessible live parts
3.1.2.15
insulation/insulated

supply of electrical energy to live parts is switched off and inadvertent reconnection prevented

3.1.2.16
live part
conductor or conductive part intended to be energized in normal use

Note 1 to entry: By convention this does not include the running rails and parts connected to them.

3.1.2.17
locking system

system which comprises interlocking devices and physically prevents access to live parts unless the

supply of electrical energy to the live parts has been isolated and made safe
3.1.2.18
mechanical locking

use of a lock or bolted /screwed fixings to prevent access panels or doors being opened and require

the use of a key or tool to remove
3.1.2.19
multi-stage insulation

insulation which is employed in, e.g., roof or underframe-mounted traction resistors which are air-

insulated
3.1.2.20
nominal voltage
voltage by which an installation or part of an installation is designated

Note 1 to entry: The voltages are expressed by the value between poles, ripple-free for DC and by the r.m.s.

value between phases for AC.

Note 2 to entry: The actual voltage may differ from the nominal voltage by a quantity within permitted

tolerances. For further information about traction systems supply voltages, see EN 50163.

3.1.2.21
PELV system

electric system in which the voltage cannot exceed the value of extra-low voltage:

– under normal conditions and
– under single fault conditions, except earth faults in other electric circuits
3.1.2.22
(electrically) protective obstacle

part preventing unintentional direct contact, but not preventing direct contact by deliberate action

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EN 50153:2014 – 10 –
3.1.2.23
power circuit

circuit carrying the current of the machines and equipment, such as convertors and traction motors,

which transmit the traction output
3.1.2.24
protection system

means of ensuring safety against electrical hazards by means of system design as opposed to reliance

on procedures
3.1.2.25
protective conductor

conductor provided for purposes of safety, for example protection against electric shock

3.1.2.26
protective-equipotential-bonding
equipotential bonding for the purposes of safety
3.1.2.27
SELV system

electric system in which the voltage cannot exceed the value of extra-low voltage:

– under normal conditions and

– under single fault conditions, including earth faults in other electric circuits

3.1.2.28
unit
minimum operational formation of articulated cars

minimum operational formation comprising one or more vehicles coupled together

3.2 Abbreviations
For the purposes of this document, the following abbreviations apply.
AC Alternating Current
DC Direct Current
SELV Safety Extra Low Voltage
PELV Protective Extra Low Voltage
r.m.s. root-mean-square value (effective value)
4 Classification of voltage bands
4.1 General principles

In this European Standard, the applicable protective measures are based on the highest value of the

nominal supply voltage which the equipment or the electrical circuits are subjected to.

The voltages are classified into bands according to the nominal value as shown in Table 1. Different

rules apply to each of these bands.
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The power supply of the various circuits installed in railway rolling stock are of different types such as:

– batteries,
– transformers,
– voltage dividers,
– rotating machines,
– static converters,
– capacitors,
– special sources.
Table 1 – Voltage bands
Nominal voltage
Band
AC DC
V V
U ≤ 25 U ≤ 60
25 < U ≤ 50 60 < U ≤ 120
III
50 < U ≤ 1 000 120 < U ≤ 1 500
IV U > 1 000 U > 1 500
4.2 Connections between circuits

Circuits operating at different nominal voltages connected by power conversion equipment which

provides a sufficient insulation between them are individually classified at the nominal voltage of each

circuit.

If the conducting paths referred to in this subclause include capacitive or inductive connections, whose

impedance is low enough to induce hazardous voltages into any circuit under either normal or fault

conditions, then all the circuits so connected are classified at the nominal voltage of the highest voltage

circuit.

NOTE This condition can apply to circuits connected, for example, by means of a chopper converter with

impedance coupling.

Where circuits are linked conductively to a higher voltage source other than directly by circuit bonds

connected to the vehicle body (for example by an auto-transformer or potential divider), all circuits in

the group are treated as if energized at the nominal voltage of the source, unless the conditions of 4.3

have been met.
4.3 Exceptions

If voltage conversion from one band to another involves overvoltage detection resulting in

disconnection of the primary or the secondary circuit, or having other means capable of preventing

excessive voltage in the secondary circuit, then the secondary circuit is permitted to be classified

according to the highest voltage at which the detection equipment will operate. Where overvoltage

detection is used the integrity of the equipment should be evaluated as appropriate.

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EN 50153:2014 – 12 –

Circuits not connected to the vehicle body, for example floating supplies, are permitted to be classified

in any voltage band. The band selected should be appropriate, taking due account of the various

potentials possible in such circuits under normal or fault conditions so as to ensure that the

requirements of this European Standard are met.

The limit between bands III and IV is allowed to be lowered to take account of special national

conditions.
NOTE The special national conditions are listed in Annex A.
5 Protective provisions against direct contact
5.1 General

Live parts capable of causing an electric shock shall be protected against direct contact. All types of

equipment shall be capable of being operated without loss of protection against direct contact.

Protection against direct contact shall be provided, where possible, by at least one of the means

described in 5.2 to 5.3.

Where it is not possible to provide protective provisions in accordance with 5.2 or 5.3, then it is

permitted to use protection by the use of band I voltage in accordance with the conditions of 5.4.

Additionally where required to ensure adequate protection against direct contact, warning labels as

described in 5.5 shall be provided.
5.2 Protection by insulation

In addition to the requirements of EN 50124-1, the insulating materials used to cover live parts shall be

appropriate to the rated equipment operating voltage and the conditions of use. Further provisions

should be considered in order to minimize the consequences of damage.
5.3 Protection by prevention of access
5.3.1 Voltages in bands I to III
5.3.1.1 Protection by the use of closed electrical operating areas

Live parts within the vehicle, energized with voltages in bands I to III shall be contained within closed

electrical operating areas.

Access to closed electrical operating areas containing energized live parts is permitted as follows:

– band I and II: access is permitted to (electrically) instructed persons and skilled persons;

– band III: access is only permitted to (electrically) instructed persons and skilled persons provided

that precautions against unintended direct contact are taken.

Prevention of access shall be achieved by mechanical locking supported with procedures and warning

labels appropriate to the location and equipment enclosed.
Means of preventing access shall comply with the following:

• in areas within vehicles, accessible to ordinary persons, screens and covers shall conform to the

degree of protection IP4X according to EN 60529, or, where these are electrically connected to the

vehicle body, to the degree of protection IP2XD according to EN 60529; the requirements of this

subclause do not apply to plug connectors, lamp holders without lamps and fuse sockets for

screw-in type fuses without inserts;
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• in other areas where grid or mesh screens are used, these shall be placed at a sufficient distance

to prevent any direct contact, taking into account possible buckling or warping.
5.3.1.2 Protection by the use of electrical operating areas

For live parts contained within an electrical operating area the following shall apply:

– Live parts energized within bands I and II need no protection against direct contact provided that

the requirements of 8.5.2 are met.

– The use of (electrically) protective obstacles to afford a limited protection against direct contact

with live parts at band III voltages may be acceptable in electrical operating areas inaccessible to

ordinary persons by their location (such as underframe cases, roofs, interiors of motor units,

excluding driver's cabs), provided that the hazard is readily identifiable. For example, it is

acceptable for fuses and isolating links of equipment at band III voltages, whose grips are

protected with an insulating material, not to be protected. Such components shall only be situated

in electrical operating areas.
5.3.1.3 Protection by clearance

For live parts on the outside of the vehicle (e.g. current collectors, roof conductors, resistors) which are

potentially accessible to persons in a straight line from any standing surface in, on or by vehicles,

protection against direct contact by means of clearance shall be provided if no other protective

measures as defined in this European Standard are used.

NOTE 1 Accessible in a straight line implies that live parts can be touched from a standing surface without

use of specially shaped objects.

Protection by clearance is considered to be provided, if at least the clearances from standing surfaces

to live parts depicted in EN 50122-1:2011, Figure 3, are maintained, excepting the condition of shoe

gear adjacent to the platform edge as detailed in 8.2.2.

This protection is considered to be present, if contact with live parts is possible but clearance is

afforded in case of the movement of the vehicle (e.g. on road and foot-crossings). Where only

(electrically) instructed persons and skilled persons have access and where operation of the system

makes protection by clearance impossible (e.g. systems using third and/or third and fourth rail power

supplies) protection shall be afforded by procedure.

NOTE 2 Co-operation is required with the Infrastructure Manager in order to comply with this subclause.

5.3.1.4 Protection against hazards from power supply bus line

Access to live parts that may be energized with voltage band III when the supply system is likely to be

energized from an external source (e.g. another vehicle, preheating equipment, shed supply, etc.) shall

be prevented by an interlocking device or a procedure.

Connectors in the power supply bus line shall be fitted with warning labels in accordance with 5.5.

5.3.2 Voltages in band IV
5.3.2.1 Protection by the use of closed electrical operating areas
Access to
...

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