SIST EN 50155:2007

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Railway applications - Electronic equipment used on rolling stockŽelezniške naprave – Elektronska oprema na voznih sredstvihApplications ferroviaires - Equipements électroniques utilisés sur le matériel roulantBahnanwendungen - Elektronische Einrichtungen auf SchienenfahrzeugenTa slovenski standard je istoveten z:EN 50155:2007SIST EN 50155:2007en,fr,de45.060.10Tractive stock29.280Electric traction equipmentICS:SIST EN 50155:2002/A1:2003SIST EN 50155:20021DGRPHãþDSLOVENSKI
STANDARDSIST EN 50155:200701-oktober-2007







EUROPEAN STANDARD EN 50155 NORME EUROPÉENNE
EUROPÄISCHE NORM July 2007
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
© 2007 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50155:2007 E
English version
Railway applications -
Electronic equipment used on rolling stock
Applications ferroviaires -
Equipements électroniques utilisés
sur le matériel roulant
Bahnanwendungen -
Elektronische Einrichtungen
auf Schienenfahrzeugen
This European Standard was approved by CENELEC on 2007-03-01. 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, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
ICS 45.060.10 Supersedes EN 50155:2001 + A1:2002



EN 50155:2007 - 2 - Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 9X, Electrical and electronic applications for railways.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50155 on 2007-03-01.
This European Standard supersedes EN 50155:2001 + A1:2002.
This EN 50155:2007 has been aligned with the new EN 50121 series and addresses some Portuguese comments.
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)
2008-03-01 – latest date by which the national standards conflicting with the EN have to be withdrawn
(dow)
2010-03-01
This European Standard has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and covers essential requirements of EC Directives 96/48/EC and 2001/16/EC. See Annex ZZ. ____________



- 3 - EN 50155:2007 Contents 1 Scope.5 2 Normative references.5 3 Definitions.7
4 Environmental service conditions of operation.8
4.1
Normal service conditions.8 4.2
Special service conditions.10
5 Electrical service conditions.10
5.1
Power supply.10 5.2
Supply.12 5.3
Installation.12 5.4
Surges electrostatic discharge and transient burst susceptibility tests.12 5.5
Electromagnetic compatibility.12
6 Reliability, maintainability and expected useful life.12
6.1
Equipment reliability.12 6.2
Useful life.13 6.3
Maintainability.13 6.4
Maintenance levels.13 6.5
Built-in diagnostics.14 6.6
Automatic test equipment.14 6.7
Alternative methods for fault diagnosis.14 6.8
Purpose built test equipment and special tools.14
7 Design.15
7.1 General.15 7.2
Detailed practices - Hardware.15 7.3
Detailed practices - Software.17 7.4
Equipment features.19
8 Components.20
8.1
Procurement.20 8.2
Application.21
9 Construction.21
9.1
Equipment construction.21 9.2
Component mounting.21 9.3
Electrical connections.22 9.4
Internal flexible wiring (electrical and optical).23 9.5
Flexible printed and strip wiring.23 9.6
Printed board-flexible and rigid.24 9.7
Protective coatings for printed board assemblies.24 9.8
Identification.25 9.9
Mounting.25 9.10
Cooling and ventilation.25 9.11
Materials and finishes.26



EN 50155:2007 - 4 - 10 Safety.26
10.1
General.26 10.2
Functional safety.26 10.3
Personnel safety.26
11 Documentation.26
11.1 Supply and storage of documentation.26 11.2
Hardware and software documentation.26 11.3
Documentation requirements.28
12 Testing.29
12.1
Categories of tests.29 12.2 List of tests.30
Annex A (informative) List of subclauses in which agreement between the parties (e.g. user and manufacturer) is mentioned.40 Bibliography.41 Annex ZZ (informative) Coverage of Essential Requirements of EC Directives.42
Figure 1 - System interfacing with the typical EMC areas A, B and C .16 Figure 2 - Supply overvoltage .34 Figure 3 - Alternative test for supply overvoltage.35
Table 1 - Ambient temperature.9 Table 2 - List of tests.30



- 5 - EN 50155:2007 1 Scope
This standard applies to all electronic equipment for control, regulation, protection, supply, etc., installed on rail vehicles and associated with: - either the accumulator battery of the vehicle; - or a low voltage power supply source with or without a direct connection to the contact system (transformer, potentiometer device, auxiliary supply); with the exception of electronic power circuits, which conform to EN 50207.
This standard covers the conditions of operation, design, construction, and testing of electronic equipment, as well as basic hardware and software requirements considered necessary for competent, reliable equipment.
Additional requirements in other standards or individual specifications may complement this standard, if they are justified.
Specific requirements related to practices necessary to assure defined levels of functional safety are to be determined in accordance with 4.6.3.1 and 4.6.3.2 of EN 50126 and its informative Annex A. Software safety integrity level of 1 or higher shall only be considered when it is shown that a residual safety risk remains and that it has to be carried by the software driven programmable electronic system. In such a case (i.e. software safety integrity level 1 or higher), EN 50128 is applicable.
For the purpose of this standard, electronic equipment is defined as equipment mainly composed of semiconductor devices and recognized associated components. These components will mainly be mounted on printed boards.
NOTE Sensors (current, voltage, speed, etc.) and firing unit printed board assemblies for power electronic devices are covered by this standard. Complete firing units are covered by EN 50207.
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.
EN 50121-3-2 2000 Railway Applications - Electromagnetic compatibility Part 3-2: Rolling stock – Apparatus EN 50125-1 1999 Railway Applications – Environmental conditions
for equipment– Part 1: Equipment on board rolling stock EN 50126 Series Railway applications - The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS) EN 50128 2001 Railway applications - Communication, signalling and processing systems -Software for railway control and protection systems EN 50163 1995 Railway Applications - Supply voltages of traction systems EN 50207 2000 Railway applications - Electronic power converters for rolling stock
(IEC 61287-1:1995, related) EN 60068
Series Environmental testing (IEC 60068 series) EN 60068-2-1 1993
Environmental testing – Part 2: Tests – Test A: Cold (IEC 60068-2-1:1990) EN 60068-2-2 1993 Environmental testing – Part 2: Tests – Test B: Dry heat (IEC 60068-2-2:1974 + IEC 60068-2-2A:1976) EN 60068-2-30 2005 Environmental testing – Part 2: Tests – Test Db and guidance: Damp heat, cyclic (12 + 12 hour cycle) (IEC 60068-2-30:2005)



EN 50155:2007 - 6 - EN 60077
Series Railway applications –
Electrotechnical equipment for rolling stock
(IEC 60077 series, modified) EN 60249-2-15
1994 Base materials for printed circuits – Part 2: Specifications -- Specification No. 15: Flexible copper-clad polyimid film, of defined flammability (publication withdrawn) EN 60297
Series Mechanical structures for electronic equipment - Dimensions of mechanical structures of the 482,6 mm (19 in) series (IEC 60297 series) EN 60352 Series Solderless connections (IEC 60352 series) EN 60352-1 1997 Solderless connections – Part 1: Wrapped connections - General requirements, test methods and practical guidance (IEC 60352-1:1997) EN 60352-2 2006 Solderless connections – Part 2: Crimped connections - General requirements, test methods and practical guidance (IEC 60352-2:2006) EN 60529 1991 Degrees of protection provided by enclosures (IP Codes)
(IEC 60529:1989) EN 61000-4-4 2004 Electromagnetic compatibility (EMC) – Part 4-4: Testing and measurement techniques - Electrical fast transient/burst immunity test
(IEC 61000-4-4:2004) EN 61082 Series Preparation of documents used in electrotechnology (IEC 61082 series) EN 61249
Series Materials for printed boards and other interconnecting structures (IEC 61249 series) EN 61249-2-7 2002 Materials for printed boards and other interconnecting structures –
Part 2-7: Reinforced base materials, clad and unclad - Epoxide woven E-glass laminated sheet of defined flammability (vertical burning test), copper-clad
(IEC 61249-2-7:2002) EN 61249-2-10 2003 Materials for printed boards and other interconnecting structures –
Part 2-10: Reinforced base materials, clad and unclad - Cyanate ester, brominated epoxide, modified or unmodified, woven E-glass reinforced laminated sheets of defined flammability (vertical burning test), copper-clad
(IEC 61249-2-10:2003) EN 61373 1999 Railway applications - Rolling stock equipment - Shock and vibration tests (IEC 61373:1999) EN 62326 Series Printed boards EN 123000 1991 Generic specification - Printed boards EN 123200 1992 Sectional specification - Single and double sided printed boards with plated-through holes EN 123300 1992 Sectional specification - Multi-layer printed boards EN 123400 1992 Sectional specification - Flexible printed boards without through connections EN 123500 1992 Sectional specification - Flexible printed boards with through connections EN ISO 9000-3 1997 Quality management and quality assurance standards Part 3: Guidelines for the application of ISO 9001 to the development, supply and maintenance of software (ISO 9000-3:1991) EN ISO 9001
Quality management systems - Requirements (ISO 9001) EN ISO 9002
Quality systems - Model for quality assurance in production, installation and servicing (ISO 9002) IEC 60605 Series Equipment reliability testing IEC 60617 Database
Graphical symbols for diagrams



- 7 - EN 50155:2007 3 Definitions
For the purposes of this standard, the following definitions apply:
3.1 printed board base material cut to size containing all holes and bearing at least one conductive pattern. Printed boards are typically subdivided according to: - their structure (e.g. single and double-sided, multilayers) - the nature of the base material (e.g. rigid, flexible)
3.2 printed board assembly printed board with electrical and mechanical components and/or other printed boards attached to it with all manufacturing processes, soldering, coating, etc., completed
3.3 plug-in unit unit which plugs into a subrack and is supported by guides. These units can be of various types, ranging from a printed board with components mounted in a frame or box type unit, designed with a plug-in connection
3.4 subrack structural unit for housing printed board assemblies and/or plug-in units
3.5 rack free-standing or fixed structure for supporting electrical or electronic equipment (e.g. subracks)
3.6 cubicle any enclosure for housing electrical and/or electronic equipment
3.7 line replaceable unit unit designed to be exchanged as a result of on-vehicle fault diagnosis, e.g. a subrack, or plug-in unit
3.8 performance check short form performance test which is carried out during and after environmental tests, sufficient to prove that the equipment is within its operational limits, and that it has survived an environmental test
3.9 control system voltage supply voltage supply used to power the vehicle control equipment The supply may be derived from a vehicle battery. The battery may be charged from battery chargers, auxiliary inverters and motor-alternator or motor-generator sets with associated electronic regulations Where the control system voltage supply is derived from a battery, the nominal and rated control system voltages are defined in 5.1. Where no battery is fitted, the nominal control system voltage is the normal controlled level of that voltage
3.10 vehicle wiring all wiring which can be connected to the control system voltage supply, wherever located, and all other wiring external to the electronic equipment under consideration



EN 50155:2007 - 8 - 3.11 supply overvoltage electrical disturbance to the control system voltage supply caused by equipment controlling that supply. A supply overvoltage will occur as an increase in the level of the control system voltage supply
3.12 surge non-periodic and relatively short positive or negative (or both) variable (voltage or current) between two steady states It may be produced by the normal operation of equipment within the vehicle, caused generally by the discharge of energy when inductive circuits are switched It may be present either on the control system voltage supply, or on wiring connected directly to switched inductive circuits, or coupled electrostatically or electromagnetically from such wiring into other wiring The effective value of the source impedance of a transient will depend upon the manner of its generation and coupling
3.13 burst repetitive pulses occurring during a fixed time interval They may occur during normal operation of the vehicle, typically resulting from unstable arc conditions
3.14 failure termination of the ability of an item to perform a required function A temporary malfunction will not be considered a failure provided that: a) The equipment recovers normal operation automatically following malfunction b) The malfunction is not apparent to the vehicle operating staff; for example, fault indicators do not light up.
NOTE Attention is drawn to the possibility of a consequential failure of a second item of equipment resulting from a temporary malfunction of another item of equipment connected to it.
3.15 damage any change in visual appearance or alteration of mechanical integrity
3.16 useful life under given conditions, the time interval beginning at a given instant of time and ending when the failure rate becomes unacceptable, or when the item is considered not repairable as a result of a fault or for other relevant factors
NOTE For a repairable item the individual useful life may be ended by a failure which is not considered as repairable for any reason.
4 Environmental service conditions of operation
4.1 Normal service conditions
4.1.1 Altitude
The altitude at which the equipment is normally to function does not exceed the values called for in EN 50125-1, Subclause 4.2. When it exceeds this figure, compliance with the requirements shall be defined by agreement between manufacturer and user.
4.1.2 Ambient temperature
Electronic equipment shall be designed and manufactured to meet the full performance specification requirement for the selected temperature categories as stated in Table 1.



- 9 - EN 50155:2007 The design shall take into account temperature rises within cubicles to ensure that the components do not exceed their specified temperature ratings. In addition, the equipment shall meet the special short-term start up thermal conditions as stated in column 3. In this interval the full performance ratings may be relaxed, but the maximum air temperature surrounding the printed board assembly according to column 4 shall not be exceeded.
Table 1 - Ambient temperature Column 1 Column 2 Column 3 Column 4 Class Ambient temperature outside vehicle (EN 50125-1,
Table 2, Column 1) °C Internal cubicle temperature
°C Internal cubicle overtemperature during 10 min
°C Air temperature surrounding the printed board assembly
°C T1 -25
+40 -25
+55 +15
-25
+70 T2 -40
+35 -40
+55
+15 -40
+70 T3 -25
+45 -25
+70 +15 -25
+85 TX -40
+50 -40
+70 +15 -40
+85
NOTE The differences between EN 50155 Table 1 (column 2) and EN 50125-1 Table 2 (column 3) are mainly due to the following reasons:
EN 50125-1 refers to a general application, where cubicles are provided without any particular thermal design.
In electronic equipment, a thermal design is usually needed, to guarantee a convenient minimum and maximum ambient temperature for the electronic components. The components reliability is very sensitive to the ambient temperature. The values given for the maximum temperatures inside the cubicle has been restricted to a choice of two to allow manufacturers to have only two classes of cards.
For peripheral units (measuring transducers, etc.), or if the equipment is in a decentralized configuration, then if the above ambient temperature ranges are exceeded, the actual temperatures occurring at the location of the equipment concerned shall be used in the design.
Rapid external ambient temperature variations resulting from running through tunnels shall be taken into account. For this purpose the rate of change of external temperature shall be assumed to be 3 °C/sec, with a maximum variation of 40 °C .
4.1.3 Shock and vibration
The equipment shall be able to withstand, without deterioration or malfunction, vibrations and shocks that occur in service. In order to provide some reasonable degree of confidence that it will survive the specified useful life under service conditions, it shall be capable of meeting the vibration, shock and bump test as described in 12.2.11. For these purposes the equipment is specified as having the electronic units installed complete, and supported in their designed fixings, with anti-vibration mounts where fitted. For the typical values of shocks and vibrations in real service, reference is made to EN 61373.
4.1.4 Relative humidity
The equipment shall be designed for the following humidity stresses (limit values) over the relevant range of the external ambient temperature as defined in 4.1.2: - yearly average ≤ 75 % relative humidity,
- 30 consecutive days in the year: 95 % relative humidity.



EN 50155:2007 - 10 - In addition, any moisture condensation shall not lead to any malfunction or failure. For peripheral units (measuring transducers etc.), or if the equipment is in a decentralized configuration, then if the above humidity stresses are exceeded, the actual humidity occurring at the location of the equipment concerned shall be used in the design.
4.2 Special service conditions
Special arrangements shall be agreed between the appropriate parties involved when service conditions can be proved to be different from those mentioned in 2.1 (e.g. electronic equipment mounted on the bogie or integrated within a power converter etc.). Checks for the effectiveness of such arrangements can, if required, form the subject of optional type tests which can be carried out on the vehicle itself in accordance with methods to be agreed between the user and the manufacturer.
4.2.1 Atmospheric pollutants
The equipment may be expected to be exposed throughout its life to various pollutants (e.g. oil mist, salt spray, conductive dust, sulphur dioxide.). The types of pollutants and their concentration should be defined in the tender documents.
5 Electrical service conditions
5.1 Power supply
5.1.1 Supply from accumulator battery
The nominal voltage of equipment (Un) so supplied shall be selected from amongst the following values:
24 V, 48 V, 72 V, 96 V, 110 V
NOTE 1 These nominal voltage values are given only as standardising values for the design of equipment. They should not be considered as the off load battery voltages since these are determined by the types of battery, the number of cells and the operating conditions.
NOTE 2 Different voltage variations may be used, following EN 60077. In this case compliance with the requirements should be defined by agreement between manufacturer and user.
5.1.1.1
Variations of voltage supply
Electronic equipment supplied by accumulator batteries without a voltage stabilizing device shall operate satisfactorily for all the values of the supply voltage within the range defined below (measured at the input terminals of the equipment). The supplier of the electronic equipment shall specify its power consumption in order to enable calculations for the battery cabling.
Minimum voltage: 0,7 Un
Nominal voltage: Un
Rated voltage:
1,15 Un
Maximum voltage:
1,25 Un Voltage fluctuations (e.g. during start-up of auxiliary equipment or voltage oscillations of battery chargers) lying between 0,6 Un and 1,4 Un and not exceeding 0,1 s shall not cause deviation of function. Voltage fluctuations lying between 1,25 Un and 1,4 Un and not exceeding 1 s shall not cause damage: equipment may not be fully functioning during these fluctuations. In the case of thermal engines, see also 5.1.1.3.



- 11 - EN 50155:2007 5.1.1.2
Interruptions of voltage supply
Interruptions of up to 10 ms may occur on input voltage as defined below: - Class S1: no interruptions - Class S2: 10 ms interruptions
This shall not cause any equipment failure.
The time values specified are for nominal voltage and the choice of classes shall be defined by the system designer.
5.1.1.3
Variations of voltage supplies for rolling stock powered by thermal engines
At start-up of thermal engines the voltage supply system shall be designed to guarantee the supply to the essential electronic equipment during the whole starting sequence.
5.1.1.4
D.C. ripple factor
All batteries on charge have a pulsating voltage, the d.c. ripple factor of which, unless otherwise stated, shall not be greater than 15 % calculated from the equation:
Umax - Umin
d.c. ripple factor =  x 100
Umax + Umin
where Umax and Umin are the maximum and minimum values, respectively, of the pulsating voltage.
The minimum and maximum voltages as defined in 5.1.1.1 however shall not be exceeded.
5.1.2 Supply by a static converter or a rotating set
In the case of equipment supplied with power from a stabilized source, (e.g. a static converter or a rotating motor-generator set provided with a regulator), electronic equipment shall operate satisfactorily for values of the supply voltage lying between 0,9 and 1,1 Un, where Un is the nominal voltage and can be either d.c. or a.c. In addition, for operating equipment, voltage fluctuations lying between 0,7 Un and 1,25 Un not exceeding 1 s and
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