ESO (1) Reference and title of the standard (and reference document) Reference of superseded standard Date of cessation of presumption of conformity of superseded standard Note 1

(1) (2) (3) (4)

CEN EN ISO 3381:2011 Railway applications — Acoustics — Measurement of noise inside railbound vehicles (ISO 3381:2005)

CEN EN 12080:2017 Railway applications — Axleboxes — Rolling bearings EN 12080:2007+A1:2010 Note 2.1 The date of this publication

CEN EN 12081:2017 Railway applications — Axleboxes — Lubricating greases EN 12081:2007+A1:2010 Note 2.1 The date of this publication

CEN EN 12082:2017 Railway applications — Axleboxes — Performance testing EN 12082:2007+A1:2010 Note 2.1 The date of this publication

CEN EN 12663-1:2010+A1:2014 Railway applications — Structural requirements of railway vehicle bodies — Part 1: Locomotives and passenger rolling stock (and alternative method for freight wagons) EN 12663-1:2010 Note 2.1 8.7.2016

CEN EN 12663-2:2010 Railway applications — Structural requirements of railway vehicle bodies — Part 2: Freight wagons

CEN EN 13103-1:2017 Railway applications — Wheelsets and bogies — Part 1: Design method for axles with external journals EN 13103:2009+A2:2012 EN 13104:2009+A2:2012 Note 2.1 The date of this publication

CEN EN 13129:2016 Railway applications — Air conditioning for main line rolling stock — Comfort parameters and type tests

CEN EN 13145:2001+A1:2011 Railway applications — Track — Wood sleepers and bearers

CEN EN 13230-1:2016 Railway applications — Track — Concrete sleepers and bearers — Part 1: General requirements EN 13230-1:2009 Note 2.1 15.12.2017

CEN EN 13230-2:2016 Railway applications — Track — Concrete sleepers and bearers — Part 2: Prestressed monoblock sleepers EN 13230-2:2009 Note 2.1 15.12.2017

CEN EN 13230-3:2016 Railway applications — Track — Concrete sleepers and bearers — Part 3: Twin-block reinforced sleepers EN 13230-3:2009 Note 2.1 15.12.2017

CEN EN 13230-4:2009 Railway applications — Track — Concrete sleepers and bearers — Part 4: Prestressed bearers for switches and crossings

CEN EN 13231-5:2018 Railway applications — Track — Acceptance of works — Part 5: Procedures for rail reprofiling in plain line, switches, crossings and expansion devices

CEN EN 13232-2:2003+A1:2011 Railway applications — Track — Switches and crossings — Part 2: Requirements for geometric design

CEN EN 13232-3:2003+A1:2011 Railway applications — Track — Switches and crossings — Part 3: Requirements for wheel/rail interaction

CEN EN 13232-4:2005+A1:2011 Railway applications — Track — Switches and crossings — Part 4: Actuation, locking and detection

CEN EN 13232-5:2005+A1:2011 Railway applications — Track — Switches and crossings — Part 5: Switches

CEN EN 13232-6:2005+A1:2011 Railway applications — Track — Switches and crossings — Part 6: Fixed common and obtuse crossings

CEN EN 13232-7:2006+A1:2011 Railway applications — Track — Switches and crossings — Part 7: Crossings with moveable parts

CEN EN 13232-8:2007+A1:2011 Railway applications — Track — Switches and crossings — Part 8: Expansion devices

CEN EN 13232-9:2006+A1:2011 Railway applications — Track — Switches and crossings — Part 9: Layouts

CEN EN 13260:2009+A1:2010 Railway applications — Wheelsets and bogies — Wheelsets — Product requirements

CEN EN 13261:2009+A1:2010 Railway applications — Wheelsets and bogies — Axles — Product requirements

CEN EN 13262:2004+A2:2011 Railway applications — Wheelsets and bogies — Wheels — Product requirements

CEN EN 13272:2012 Railway applications — Electrical lighting for rolling stock in public transport systems

CEN EN 13481-2:2012+A1:2017 Railway applications — Track — Performance requirements for fastening systems — Part 2: Fastening systems for concrete sleepers EN 13481-2:2012 Note 2.1 15.12.2017

CEN EN 13481-3:2012 Railway applications — Track — Performance requirements for fastening systems — Part 3: Fastening systems for wood sleepers

CEN EN 13481-5:2012+A1:2017 Railway applications — Track — Performance requirements for fastening systems — Part 5: Fastening systems for slab track with rail on the surface or rail embedded in a channel EN 13481-5:2012 Note 2.1 15.12.2017

CEN EN 13481-7:2012 Railway applications — Track — Performance requirements for fastening systems — Part 7: Special fastening systems for switches and crossings and check rails

CEN EN 13674-1:2011+A1:2017 Railway applications — Track — Rail — Part 1: Vignole railway rails 46 kg/m and above EN 13674-1:2011 Note 2.1 15.12.2017

CEN EN 13674-2:2006+A1:2010 Railway applications — Track — Rail — Part 2: Switch and crossing rails used in conjunction with Vignole railway rails 46 kg/m and above

CEN EN 13674-3:2006+A1:2010 Railway applications — Track — Rail — Part 3: Check rails

CEN EN 13715:2006+A1:2010 Railway applications — Wheelsets and bogies — Wheels — Tread profile

CEN EN 13749:2011 Railway applications — Wheelsets and bogies — Method of specifying the structural requirements of bogie frames

CEN EN 13803-1:2010 Railway applications — Track — Track alignment design parameters — Track gauges 1 435 mm and wider — Part 1: Plain line

CEN EN 13803-2:2006+A1:2009 Railway applications — Track — Track alignment design parameters — Track gauges 1 435 mm and wider — Part 2: Switches and crossings and comparable alignment design situations with abrupt changes of curvature

CEN EN 13848-5:2017 Railway applications — Track — Track geometry quality — Part 5: Geometric quality levels — Plain line, switches and crossings EN 13848-5:2008+A1:2010 Note 2.1 The date of this publication

CEN EN 13979-1:2003+A2:2011 Railway applications — Wheelsets and bogies — Monobloc wheels — Technical approval procedure — Part 1: Forged and rolled wheels EN 13979-1:2003+A1:2009 Note 2.1 30.9.2011

CEN EN 14033-1:2017 Railway applications — Track — Railbound construction and maintenance machines — Part 1: Technical requirements for running EN 14033-1:2011 Note 2.1 15.12.2017

CEN EN 14067-4:2005+A1:2009 Railway applications — Aerodynamics — Part 4: Requirements and test procedures for aerodynamics on open track

CEN EN 14067-5:2006+A1:2010 Railway applications — Aerodynamics — Part 5: Requirements and test procedures for aerodynamics in tunnels

CEN EN 14067-6:2010 Railway applications — Aerodynamics — Part 6: Requirements and test procedures for cross wind assessment

CEN EN 14198:2016 Railway applications — Braking — Requirements for the brake system of trains hauled by locomotives

CEN EN 14531-1:2015 Railway applications — Methods for calculation of stopping and slowing distances and immobilization braking — Part 1: General algorithms utilizing mean value calculation for train sets or single vehicles 8.7.2016

CEN EN 14531-2:2015 Railway applications — Methods for calculation of stopping and slowing distances and immobilization braking — Part 2: Step by step calculations for train sets or single vehicles EN 14531-6:2009 Note 2.1 8.7.2016

CEN EN 14535-1:2005+A1:2011 Railway applications — Brake discs for railway rolling stock — Part 1: Brake discs pressed or shrunk onto the axle or drive shaft, dimensions and quality requirements

CEN EN 14535-2:2011 Railway applications — Brake discs for railway rolling stock — Part 2: Brake discs mounted onto the wheel, dimensions and quality requirements

CEN EN 14535-3:2015 Railway applications — Brake discs for railway rolling stock — Part 3: Brake discs, performance of the disc and the friction couple, classification

CEN EN 14587-2:2009 Railway applications — Track — Flash butt welding of rails — Part 2: New R220, R260, R260Mn and R350HT grade rails by mobile welding machines at sites other than a fixed plant

CEN EN 14601:2005+A1:2010 Railway applications — Straight and angled end cocks for brake pipe and main reservoir pipe

CEN EN 14752:2015 Railway applications — Body side entrance systems for rolling stock

CEN EN 14813-1:2006+A1:2010 Railway applications — Air conditioning for driving cabs — Part 1: Comfort parameters

CEN EN 14813-2:2006+A1:2010 Railway applications — Air conditioning for driving cabs — Part 2: Type tests

CEN EN 14865-1:2009+A1:2010 Railway applications — Axlebox lubricating greases — Part 1: Method to test the ability to lubricate

CEN EN 14865-2:2006+A2:2010 Railway applications — Axlebox lubricating greases — Part 2: Method to test the mechanical stability to cover vehicle speeds up to 200 km/h

CEN EN 15020:2006+A1:2010 Railway applications — Rescue coupler — Performance requirements, specific interface geometry and test methods

CEN EN 15153-1:2013+A1:2016 Railway applications — External visible and audible warning devices for trains — Part 1: Head, marker and tail lamps EN 15153-1:2013 Note 2.1 15.12.2017

CEN EN 15153-2:2013 Railway applications — External visible and audible warning devices for trains — Part 2: Warning horns

CEN EN 15220:2016 Railway applications — Brake indicators EN 15220-1:2008+A1:2011 Note 2.1 15.12.2017

CEN EN 15227:2008+A1:2010 Railway applications — Crashworthiness requirements for railway vehicle bodies

CEN EN 15273-2:2013+A1:2016 Railway applications — Gauges — Part 2: Rolling stock gauge EN 15273-2:2013 Note 2.1 15.12.2017

CEN EN 15273-3:2013+A1:2016 Railway applications — Gauges — Part 3: Structure gauges EN 15273-3:2013 Note 2.1 15.12.2017

CEN EN 15302:2008+A1:2010 Railway applications — Method for determining the equivalent conicity

CEN EN 15313:2016 Railway applications — In-service wheelset operation requirements — In-service and off-vehicle wheelset maintenance EN 15313:2010 Note 2.1 15.12.2017

CEN EN 15355:2008+A1:2010 Railway applications — Braking — Distributor valves and distributor-isolating devices

CEN EN 15427:2008+A1:2010 Railway applications — Wheel/rail friction management — Flange lubrication

CEN EN 15437-1:2009 Railway applications — Axlebox condition monitoring — Interface and design requirements — Part 1: Track side equipment and rolling stock axlebox

CEN EN 15437-2:2012 Railway applications — Axlebox condition monitoring — Interface and design requirements — Part 2: Performance and design requirements of on-board systems for temperature monitoring

CEN EN 15461:2008+A1:2010 Railway applications — Noise emission — Characterisation of the dynamic properties of track sections for pass by noise measurements

CEN EN 15528:2015 Railway applications — Line categories for managing the interface between load limits of vehicles and infrastructure EN 15528:2008+A1:2012 Note 2.1 8.7.2016

CEN EN 15551:2017 Railway applications — Railway rolling stock — Buffers EN 15551:2009+A1:2010 Note 2.1 15.12.2017

CEN EN 15566:2016 Railway applications — Railway rolling stock — Draw gear and screw coupling EN 15566:2009+A1:2010 Note 2.1 15.12.2017

CEN EN 15594:2009 Railway applications — Track — Restoration of rails by electric arc welding

CEN EN 15595:2009+A1:2011 Railway applications — Braking — Wheel slide protection

CEN EN 15610:2009 Railway applications — Noise emission — Rail roughness measurement related to rolling noise generation

CEN EN 15611:2008+A1:2010 Railway applications — Braking — Relay valves EN 15611:2008 Note 2.1 30.4.2011

CEN EN 15612:2008+A1:2010 Railway applications — Braking — Brake pipe accelerator valve EN 15612:2008 Note 2.1 30.4.2011

CEN EN 15624:2008+A1:2010 Railway applications — Braking — Empty-loaded changeover devices EN 15624:2008 Note 2.1 30.4.2011

CEN EN 15625:2008+A1:2010 Railway applications — Braking — Automatic variable load sensing devices EN 15625:2008 Note 2.1 30.4.2011

CEN EN 15654-1:2018 Railway applications — Measurement of vertical forces on wheels and wheelsets — Part 1: On-track measurement sites for vehicles in service

CEN EN 15686:2010 Railway applications — Testing for the acceptance of running characteristics of railway vehicles with cant deficiency compensation system and/or vehicles intended to operate with higher cant deficiency than stated in EN 14363:2005, Annex G

CEN EN 15687:2010 Railway applications — Testing for the acceptance of running characteristics of freight vehicles with static axle loads higher than 225 kN and up to 250 kN

CEN EN 15723:2010 Railway applications — Closing and locking devices for payload protecting devices against environmental influences — Requirements for durability, operation, indication, maintenance, recycling

CEN EN 15734-1:2010 Railway applications — Braking systems of high speed trains — Part 1: Requirements and definitions

CEN EN 15734-2:2010 Railway applications — Braking systems of high speed trains — Part 2: Test methods

EN 15734-2:2010/AC:2012

CEN EN 15746-1:2010+A1:2011 Railway applications — Track — Road-rail machines and associated equipment — Part 1: Technical requirements for running and working EN 15746-1:2010 Note 2.1 30.4.2011

CEN EN 15746-2:2010+A1:2011 Railway applications — Track — Road-rail machines and associated equipment — Part 2: General safety requirements EN 15746-2:2010 Note 2.1 30.4.2012

CEN EN 15806:2010 Railway applications — Braking — Static brake testing

CEN EN 15807:2011 Railway applications — Pneumatic half couplings

CEN EN 15827:2011 Railway applications — Requirements for bogies and running gears

CEN EN 15877-1:2012 Railway applications — Marking on railway vehicles — Part 1: Freight wagons

CEN EN 15877-2:2013 Railway applications — Markings of railway vehicles — Part 2: External markings on coaches, motive power units, locomotives and on track machines

CEN EN 15892:2011 Railway applications — Noise Emission — Measurement of noise inside driver’s cabs

CEN EN 16019:2014 Railway applications — Automatic coupler — Performance requirements, specific interface geometry and test method

CEN EN 16116-1:2013 Railway applications — Design requirements for steps, handrails and associated access for staff — Part 1: Passenger vehicles, luggage vans and locomotives

CEN EN 16116-2:2013 Railway applications — Design requirements for steps, handrails and associated access for staff — Part 2: Freight wagons

CEN EN 16185-1:2014 Railway applications — Braking systems of multiple unit trains — Part 1: Requirements and definitions

CEN EN 16185-2:2014 Railway applications — Braking systems of multiple unit trains — Part 2: Test methods

CEN EN 16186-2:2017 Railway applications — Driver’s cab — Part 2: Integration of displays, controls and indicators

CEN EN 16186-3:2016 Railway applications — Driver’s cab — Part 3: Design of displays 15.12.2017

CEN EN 16207:2014 Railway applications — Braking — Functional and performance criteria of Magnetic Track Brake systems for use in railway rolling stock

CEN EN 16235:2013 Railway application — Testing for the acceptance of running characteristics of railway vehicles — Freight wagons — Conditions for dispensation of freight wagons with defined characteristics from on-track tests according to EN 14363

CEN EN 16241:2014+A1:2016 Railway applications — Slack adjuster EN 16241:2014 Note 2.1 15.12.2017

CEN EN 16286-1:2013 Railway applications — Gangway systems between vehicles — Part 1: Main applications

CEN EN 16334:2014 Railway applications — Passenger Alarm System — System requirements

CEN EN 16404:2016 Railway applications — Re-railing and recovery requirements for railway vehicles EN 16404:2014 Note 2.1 15.12.2017

CEN EN 16494:2015 Railway applications — Requirements for ERTMS Trackside Boards

CEN EN 16584-1:2017 Railway applications — Design for PRM use — General requirements — Part 1: Contrast

CEN EN 16584-2:2017 Railway applications — Design for PRM use — General requirements — Part 2: Information

CEN EN 16584-3:2017 Railway applications — Design for PRM use — General requirements — Part 3: Optical and friction characteristics

CEN EN 16585-1:2017 Railway applications — Design for PRM use — Equipment and components onboard rolling stock — Part 1: Toilets

CEN EN 16585-2:2017 Railway applications — Design for PRM use — Equipment and components on board rolling stock — Part 2: Elements for sitting, standing and moving

CEN EN 16585-3:2017 Railway applications — Design for PRM use — Equipment and components on board rolling stock — Part 3: Clearways and internal doors

CEN EN 16586-1:2017 Railway applications — Design for PRM use — Accessibility of persons with reduced mobility to rolling stock — Part 1: Steps for access and egress

CEN EN 16586-2:2017 Railway applications — Design for PRM use — Accessibility of persons with reduced mobility to rolling stock — Part 2: Boarding aids

CEN EN 16587:2017 Railway applications — Design for PRM Use — Requirements on obstacle free routes for infrastructure

CEN EN 16683:2015 Railway applications — Call for aid and communication device — Requirements

CEN EN 16729-1:2016 Railway applications — Infrastructure — Non-destructive testing on rails in track — Part 1: Requirements for ultrasonic inspection and evaluation principles

CEN EN 16729-3:2018 Railway applications — Infrastructure — Non-destructive testing on rails in track — Part 3: Requirements for identifying internal and surface rail defects

CEN EN 16922:2017 Railway applications — Ground based services — Vehicle waste water discharge equipment

CEN EN 45545-1:2013 Railway applications — Fire protection on railway vehicles — Part 1: General

CEN EN 45545-2:2013+A1:2015 Railway applications — Fire protection on railway vehicles — Part 2: Requirements for fire behaviour of materials and components EN 45545-2:2013 Note 2.1 8.7.2016

CEN EN 45545-3:2013 Railway applications — Fire protection on railway vehicles — Part 3: Fire resistance requirements for fire barriers

CEN EN 45545-4:2013 Railway applications — Fire protection on railway vehicles — Part 4: Fire safety requirements for rolling stock design

CEN EN 45545-5:2013+A1:2015 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 EN 45545-5:2013 Note 2.1 8.7.2016

CEN EN 45545-6:2013 Railway applications — Fire protection on railway vehicles — Part 6: Fire control and management systems

CEN EN 45545-7:2013 Railway applications — Fire protection on railway vehicles — Part 7: Fire safety requirements for flammable liquid and flammable gas installations

Cenelec EN 50122-1:2011 Railway applications — Fixed installations — Electrical safety, earthing and the return circuit — Part 1: Protective provisions against electric shock

EN 50122-1:2011/AC:2012

Cenelec EN 50122-2:2010 Railway applications — Fixed installations — Electrical safety, earthing and the return circuit — Part 2: Provisions against the effects of stray currents caused by d.c. traction systems

Cenelec EN 50122-3:2010 Railway applications — Fixed installations — Electrical safety, earthing and the return circuit — Part 3: Mutual Interaction of a.c. and d.c. traction systems

Cenelec EN 50124-1:2017 Railway applications — Insulation coordination — Part 1: Basic requirements — Clearances and creepage distances for all electrical and electronic equipment EN 50124-1:2001 + A1:2003 + A2:2005 Note 2.1 6.2.2020

Cenelec EN 50124-2:2017 Railway applications — Insulation coordination — Part 2: Overvoltages and related protection EN 50124-2:2001 Note 2.1 6.2.2020

Cenelec EN 50125-2:2002 Railway applications — Environmental conditions for equipment — Part 2: Fixed electrical installations

EN 50125-2:2002/AC:2010

Cenelec EN 50125-3:2003 Railway applications — Environmental conditions for equipment — Part 3: Equipment for signalling and telecommunications

EN 50125-3:2003/AC:2010

Cenelec EN 50126-1:1999 Railway applications — The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS) — Part 1: Basic requirements and generic process

EN 50126-1:1999/AC:2012

EN 50126-1:1999/AC:2006

EN 50126-1:1999/AC:2010

Cenelec EN 50129:2003 Railway applications — Communication, signalling and processing systems — Safety related electronic systems for signalling

EN 50129:2003/AC:2010

Cenelec EN 50151:2003 Railway applications — Fixed installations — Electric traction — Special requirements for composite insulators

EN 50151:2003/AC:2010

Cenelec EN 50155:2007 Railway applications — Electronic equipment used on rolling stock EN 50155:2001 Note 2.1

EN 50155:2007/AC:2012

EN 50155:2007/AC:2010

Cenelec EN 50159:2010 Railway applications — Communication, signalling and processing systems — Safety-related communication in transmission systems EN 50159-1:2001 EN 50159-2:2001 Note 2.1 1.9.2013

Cenelec EN 50163:2004 Railway applications — Supply voltages of traction systems

EN 50163:2004/AC:2013

EN 50163:2004/A1:2007 Note 3 1.3.2010

EN 50163:2004/AC:2010

Cenelec EN 50238-1:2003 Railway applications — Compatibility between rolling stock and train detection systems — Part 1: General

EN 50238-1:2003/AC:2014

Cenelec EN 50317:2012 Railway applications — Current collection systems — Requirements for and validation of measurements of the dynamic interaction between pantograph and overhead contact line EN 50317:2002 + A1:2004 + A2:2007 Note 2.1 26.12.2014

EN 50317:2012/AC:2012

Cenelec EN 50367:2012 Railway applications — Current collection systems — Technical criteria for the interaction between pantograph and overhead line (to achieve free access)

EN 50367:2012/AC:2013

EN 50367:2012/A1:2016 Note 3 25.7.2019

Cenelec EN 50388:2012 Railway Applications — Power supply and rolling stock — Technical criteria for the coordination between power supply (substation) and rolling stock to achieve interoperability EN 50388:2005 Note 2.1 13.2.2015

EN 50388:2012/AC:2013

Cenelec EN 50405:2015 Railway applications — Current collection systems — Pantographs, testing methods for contact strips

EN 50405:2015/A1:2016 Note 3 15.12.2017

Cenelec EN 50463-1:2012 Railway applications — Energy measurement on board trains — Part 1: General

Cenelec EN 50463-2:2012 Railway applications — Energy measurement on board trains — Part 2: Energy measuring

Cenelec EN 50463-3:2012 Railway applications — Energy measurement on board trains — Part 3: Data handling

Cenelec EN 50463-4:2012 Railway applications — Energy measurement on board trains — Part 4: Communication

Cenelec EN 50463-5:2012 Railway applications — Energy measurement on board trains — Part 5: Conformity assessment

Cenelec EN 50533:2011 Railway applications — Three-phase train line voltage characteristics

EN 50533:2011/A1:2016 Note 3 15.12.2017

Cenelec EN 50553:2012 Railway applications — Requirements for running capability in case of fire on board of rolling stock

EN 50553:2012/AC:2013

EN 50553:2012/A1:2016 Note 3 15.2.2019

Cenelec EN 50562:2018 Railway applications — Fixed installations — Process, protective measures and demonstration of safety for electric traction systems

Cenelec EN 50592:2016 Railway applications — Testing of rolling stock for electromagnetic compatibility with axle counters

Cenelec EN 50617-1:2015 Railway applications — Technical parameters of train detection systems for the interoperability of the trans-European railway system — Part 1: Track circuits

Cenelec EN 50617-2:2015 Railway Applications — Technical parameters of train detection systems for the interoperability of the trans-European railway system — Part 2: Axle counters

EN 50617-2:2015/AC:2016

Cenelec EN 61375-1:2012 Electronic railway equipment — Train communication network (TCN) — Part 1: General architecture IEC 61375-1:2012

Cenelec EN 61375-2-1:2012 Electronic railway equipment — Train communication network (TCN) — Part 2-1: Wire Train Bus (WTB) IEC 61375-2-1:2012

Cenelec EN 61375-2-2:2012 Electronic railway equipment — Train communication network (TCN) — Part 2-2: Wire Train Bus conformance testing IEC 61375-2-2:2012

Cenelec EN 61375-2-5:2015 Electronic railway equipment — Train communication network (TCN) — Part 2-5: Ethernet train backbone IEC 61375-2-5:2014

Cenelec EN 61375-3-1:2012 Electronic railway equipment — Train communication network (TCN) — Part 3-1: Multifunction Vehicle Bus (MVB) IEC 61375-3-1:2012

Cenelec EN 61375-3-2:2012 Electronic railway equipment — Train communication network (TCN) — Part 3-2: MVB (Multifunction Vehicle Bus) conformance testing IEC 61375-3-2:2012

Cenelec EN 61375-3-3:2012 Electronic railway equipment — Train communication network (TCN) — Part 3-3: CANopen Consist Network (CCN) IEC 61375-3-3:2012

Cenelec EN 62580-1:2016 Electronic railway equipment — On-board multimedia and telematic subsystems for railways — Part 1: General architecture IEC 62580-1:2015

Cenelec EN 62621:2016 Railway applications — Fixed installations — Electric traction — Specific requirements for composite insulators used for overhead contact line systems IEC 62621:2011 EN 50151:2003 Note 2.1 21.12.2018