SIST EN 50125-2:2003

SLOVENSKI STANDARD
01-december-2003
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Railway applications - Environmental conditions for equipment -- Part 2: Fixed electrical
installations
Bahnanwendungen - Umweltbedingungen für Betriebsmittel -- Teil 2: Ortsfeste
elektrische Anlagen
Applications ferroviaires - Conditions d'environnement pour le matériel -- Partie 2:
Installations électriques fixes
Ta slovenski standard je istoveten z: EN 50125-2:2002
ICS:
13.020.99 Drugi standardi v zvezi z Other standards related to
varstvom okolja environmental protection
29.280 (OHNWULþQDYOHþQDRSUHPD Electric traction equipment
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50125-2
NORME EUROPÉENNE
EUROPÄISCHE NORM December 2002

ICS 29.280
English version
Railway applications -
Environmental conditions for equipment
Part 2: Fixed electrical installations

Applications ferroviaires -  Bahnanwendungen -
Conditions d'environnement Umweltbedingungen für Betriebsmittel
pour le matériel Teil 2: Ortsfeste elektrische Anlagen
Partie 2: Installations électriques fixes

This European Standard was approved by CENELEC on 2002-07-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, 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

© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 50125-2:2002 E
Foreword
This European Standard was prepared by SC 9XC, Electric supply and earthing systems for
public transport equipment and ancillary apparatus (fixed installations), of Technical Committee
CENELEC TC 9X, Electrical and electronic applications for railways.

The text of the draft was submitted to the formal vote and was approved by CENELEC as
EN 50125-2 on 2002-07-01.
The following dates were fixed:

- latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2003-07-01

- latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-07-01

Annexes designated "informative" are given for information only.
In this standard, Annex A is informative.
____________
- 3 - EN 50125-2:2002
Contents
Page
1 Scope.4
2 Normative references.4
3 Definitions.5
4 Environmental conditions.6
4.1 General.6
4.2 Altitude.6
4.3 Air temperature and humidity.7
4.4 Air movement.8
4.5 Rain.10
4.6 Hail.10
4.7 Snow and ice.10
4.8 Solar radiation.10
4.9 Vibration and shocks .11
4.10 Pollution.11
4.11 Lightning.12
4.12 Electromagnetic compatibility .12
4.13 Fire protection.12
4.14 Environmental conditions in tunnels.12

Annex A (informative) Conditions relating to tunnels .13
Bibliography .15

Figure 1 - Ratio of reference wind velocity corresponding to a yearly probability p
to wind velocity with a probability of 0,02.9

Table 1 - Altitude relative to sea level.7
Table 2 - Reference wind velocities (V ).9
ref,0,0,2
Table 3 - Wind velocities .10
Table 4 - Ice loads.10
Table 5 - Solar radiation.11
Table 6 - Pollution type .12

1 Scope
This European Standard takes into account environmental conditions within Europe.

This European Standard deals with the environmental influences on fixed electrical installations
for traction power supply and equipment essential to operate a railway
- in open air;
- in covered areas;
- in tunnels;
- within enclosures placed in above areas.

Escalators, lifts, fire protection, lighting in tunnels and on platforms, ticket machines, ventilation
systems and non-essential functions are not included.

Such influences include altitude, temperature and humidity, air movement, rain, snow, hail, ice,
sand, solar radiation, lightning, pollution, vibration, shocks and EMC.

This standard does not specify the test requirements for equipment.

In case of environmental conditions not covered by the standard the data to be adopted for a
specific project should be clearly stipulated when preparing a specification.

This standard is not intended to apply to cranes, installations in underground mines, suspended
cable cars and funicular railways.

Nuclear radiation is excluded.

Signalling and telecommunications systems are not considered in this standard.

Fixed installed signalling and telecommunication equipment shall comply with EN 50125-3.

2 Normative references
This European Standard incorporates by dated or undated references, provisions from other
publications. These normative references are cited at the appropriate place in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions
of any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the last edition of the publication referred to
applies (including amendments).

EN 50121-5 Railway applications – Electromagnetic compatibility
Part 5: Emission and immunity of fixed power supply installations and
apparatus
EN 50124-1 Railway applications - Insulation coordination
Part 1: Basic requirements - Clearances and creepage distances for all
electrical and electronic equipment

EN 50124-2 Railway applications - Insulation coordination
Part 2: Overvoltages and related protection

- 5 - EN 50125-2:2002
EN 50125-3 Railway applications – Environmental conditions for equipment
Part 3: Equipment for signalling and telecommunications

EN 60529 Degrees of protection provided by enclosures (IP code)
(IEC 60529)
EN 60721-3-3 Classification of environmental conditions
Part 3: Classification of groups of environmental parameters and their
severities – Section 3: Stationary use at weatherprotected locations
(IEC 60721-3-3)
EN 60721-3-4 Classification of environmental conditions
Part 3: Classification of groups of environmental parameters and their
severities – Section 4: Stationary use at non-weatherprotected locations
(IEC 60721-3-4)
ENV 1991-2-4 Eurocode 1: Basis of design and actions on structures – Part 2-4:
Actions on structures – Wind actions

HD 478.2.1 Classification of environmental conditions
Part 2: Environmental conditions appearing in nature - Temperature and
humidity (IEC 60721-2-1)
HD 478.2.2 Classification of environmental conditions
Part 2: Environmental conditions appearing in nature - Precipitation and
wind (IEC 60721-2-2)
HD 478.2.3 Classification of environmental conditions
Part 2: Environmental conditions appearing in nature - Air pressure
(IEC 60721-2-3)
3 Definitions
For the purpose of this standard the following definitions apply.

3.1
covered area
protected from precipitation, but open to the effects of humidity and wind

NOTE 1 Some constructions may be affected by solar radiation.

NOTE 2 Tunnels are excluded from this definition.

3.2
cubicle
closed space where the direct open air influences are excluded

3.3
environment
the surrounding objects, region or circumstances which may influence the behaviour of the
system and/or may be influenced by the system

3.4
environmental conditions
conditions which are brought about because of the environment

3.5
environmental protection
provisions to avoid the interaction of the system with the environment

3.6
open air
not protected from direct environmental influences

3.7
tunnel
artificial underground passage through a hill or below the normal ground level or under sea level

4 Environmental conditions
4.1 General
The purchaser shall specify clearly in his specification the class to consider. Otherwise the class
mentioned in the product standard shall apply where available. Where no other specifications
are specified, the normal requirements in this standard shall be used. Installations shall
function, or be capable of functioning, under all specified conditions.

The environmental conditions are considered for normal operation. More severe conditions may
be specified for the equipment to withstand, when not operating, without suffering damage. An
example of such a condition is wind velocity high enough to cause dewirements but not tearing
down the overhead contact line.

Microclimates surrounding components may need special requirements which are covered by
product standards.
Special conditions are classified with a suffix X.

The severities specified are those which have a low probability of being exceeded. All specified
values are either maximum or minimum limits. These values can be reached, but do not occur
permanently. Depending on the situation there are different frequencies of occurrence related to
a certain period of time. Such frequencies of occurrence have not been included in this
standard, but should be considered for any environmental parameter, if relevant. In this case
they shall be specified.
4.2 Altitude
Altitude related to sea level is relevant for air pressure. Air pressure shall be considered in
accordance with HD 478.2.3.
The different classes of altitude above sea level in open air at which the equipment shall
perform as specified are given in Table 1.

- 7 - EN 50125-2:2002
Table 1 - Altitude relative to sea level

Class Altitude range relative to
sea level
m
A 1 up to 1 400
A 2 up to 1 000
A X above 1 400
NOTE  In class A 2 installations under sea level are included.

Using A X class, the maximum altitude shall be specified by the purchaser.

4.3 Air temperature and humidity

4.3.1 General
For air temperature and humidity in open air, the climates according to Table 2 of HD 478.2.1
shall be used, excluding the first and the last two climates.

These values are illustrated in Figure 2 to Figure 7 of HD 478.2.1.

For weather-protected areas, information is given in EN 60721-3-3.

Different values depending on national requirements are possible. These values are to be
agreed separately between purchaser and supplier, as appropriate to the local conditions.

In principle, air temperatures are measured in the shade.

The values of humidity can be 100 %.

4.3.2 Special conditions
When considering the temperature of an object, the effects of thermal radiation from the ground,
or due to the proximity of other large objects, has to be taken into account.

In open air
The temper
...