1

EUROPEANSTANDARDNORMEEUROPéENNEEUROP?ISCHENORM

EN50488

July2020

ICS13.260;45.020SupersedesCLC/TR50488:2006andallofits

amendmentsandcorrigenda(ifany)

EnglishVersion

Railwayapplications-Fixedinstallations-Electricalprotective

measuresforworkingonornearanoverheadcontactline

systemand/oritsassociatedreturncircuit

Applicationsferroviaires-Installationsfixes-Mesuresde

protectionélectriquespourdesactivitésdetravailsurouà

proximitédessystèmesdelignesaériennesdecontact

et/oulecircuitderetourassocié

Bahnanwendungen-OrtsfesteAnlagen-Elektrische

Oberleitungsanlageund/oderihrerzugeh?rigenRückleiung

Schutzma?nahmenbeiArbeitenanoderinderNaheeiner

ThisEuropeanStandardwasapprovedbyCENELECon2020-06-29.CENELECmembersareboundtocomplywiththeCEN/CENELEC

InternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.

Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCEN-CENELECManagementCentreortoanyCENELECmember.

undertheresponsibilityofaCENELECmemberintoitsownlanguageandnotifiedtotheCEN-CENELECManagementCentrehasthe

ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytranslation

samestatusastheofficialversions.

CENELECmembersarethenationalelectrotechnicalcommitteesofAustria,Belgium,Bulgaria,Croatia,Cyprus,theCzechRepublic,

Denmark,Estonia,Finland,France,Gemany,Greece,Hungary,lceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,the

Netherlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,TurkeyandtheUnitedKingdom.

EuropeanCommitteeforElectrotechnicalStandardization

ComitéEuropeendeNormalisationElectrotechnique

Europ?ischesKomiteefürElektrotechnischeNormung

CEN-CENELECManagementCentre:RuedelaScience23,B-1040Brussels

◎2020CENELECllrightsofexploitationinanyformandbyanymeansreservedworldwideforCENELECMembers.

Ref.No.EN50488:2020E

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EN50488:2020(E)

ContentsPage

Europeanforeword 4

Introduction 5

1Scope 6

2Normativereference 6

3Terms,definitions,symbolsandabbreviatedterms 6

3.1Termsanddefinition 6

3.2Symbols 14

3.3Abbreviatedterm 15

4Basicprinciples 15

4.1Electricalsafetyforworkactivity 15

4.2Personnel 16

4.3Organization 17

44Communication18

4.5Worklocation 18

4.6Tools,equipmentanddevices 19

4.7Documentationforsafeworking 19

4.8Signs 19

4.9Emergencyarrangementsduringworkactivity 20

5Protectivemeasuresforworkactivitiesonornearoverheadcontactlinesystem 20

5.1General 20

5.2Deadworking 20

5.3Workingneartohazardouslivepart 23

5.4Liveworking 26

5.5Electromagneticinfluences 27

5.6Environmentalcondition 27

6Workingproceduresforworkactivitiesonornearreturncircuit 27

6.1General 27

6.2Workingonornearpartsofreturncircuitwithoutelectricalshockhazardsinnormal

operatingcondition 27

6.3Workingonornearpartsofreturncircuitwithelectricalshockhazardsinnormal

operatingcondition 28

7Recommendeddistancesinairforworkactivities 29

AnnexA(informative)Methodofcalculationofthedistancesinairforworkingprocedures 30

A.1CalculationoftheouterlimitofthedangerzonD R…………30

A.2DeterminationofapproachdistancesDLand D……………30

A.3DeterminationofDv 31

A.4Distancesoverview 31

AnnexB(informative)Examplesofphysicalmeasurestolimitthemovementofworker 3

B.1General 33

B.2Distancesbetweenphysicalmeasureandhazardous-live-partwhenworkingzone

encroachesD 34

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B.3Distancesbetweenphysicalmeasureandhazardous-live-partwhenworkingzone

doesnotencroachDv 35

AnnexC(informative)IIlustrationofselectionprocessoftheprotectivemeasures 37

Bibliography 38

EN50488:2020(E)

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Europeanforeword

Thisdocument(EN50488:2020)hasbeenpreparedbyCLC/SC9XC"Electricsupplyandearthingsystemsforpublictransportequipmentandancillaryapparatus(Fixedinstallations)”,ofTechnicalCommitteeCLC/TC9X,"Electricalandelectronicapplicationsforrailways".

Thefollowingdatesarefixed:

·latestdatebywhichthisdocumenthastobeimplementedatnationallevelbypublicationofanidenticalnationalstandardorby

endorsement

·latestdatebywhichthenationalstandardsconflictingwiththisdocumenthavetobewithdrawn

(dop)

(dow)

2021-06-29

2023-06-29

ThisdocumentsupersedesCLC/TR50488:2006andallofitsamendmentsandcorrigenda(ifany).

Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.CENELECshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.

EN50488:2020(E)

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Introduction

Thisdocumentprovidesrailwayspecificrequirementsforelectricalprotectivemeasuresforworkingonornearanoverheadcontactlinesystemand/oritsassociatedreturncircuit.

Whendevelopingthisdocument,EN50110-1,Operationofelectricalinstallations-Part1:Generalrequirements,wasusedasaguide.EN50110-1wasnotdevelopedspecificallytoapplytotheelectrictractionsystemwhichhavedifferentcharacteristicsthanthosecommonlyfoundinotherelectricalinstallations.

Duetothenumerousvariationsoforganization,thisdocumentdoesnotgiveanyrecommendationsconcerningorganisationalstructure.

Becauseofnumerousvariationsinoverheadcontactlineswithnominalvoltagelowerthan1,5kV,thisdocumentdoesnotdealwithworkactivitiesonorneartheseoverheadcontactlinesand/ortheirassociatedreturncircuit.

ThetrendinEuropeisthat“deadworking”ismorecommonthan“l(fā)iveworking”.Inthecountrieswhereliveworkingontheoverheadcontactlinesisallowed,thenationalregulationshouldstatethenecessarysafetyrules.

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1Scope

Thisdocumentprovidesrequirementsforelectricalsafetyfor:

·deadworkingonanoverheadcontactlinesystem;

·workingactivitiesnearanoverheadcontactlinesystemwhenitislive.

Itappliestoallworkactivitiesinrelationtoelectricalhazardsonly.

Thisdocumentisapplicabletooverheadcontactlinesystemswiththefollowingnominalvoltagesandconfigurations:

·1,5kVand3kVDC;

·15kV,2x15kV,25KVand2x25kVAC.

Italsoprovidesrequirementsforworkactivitiesthatcangiverisetoelectricalhazardsfromthereturncircuit.Thisdocumentdoesnotcoverelectricalriskarisingfrom:

·liveworkingonoverheadcontactlinesystems(liveworkingcanbecarriedoutaccordingtonationalrequirements,regulationsandpractices);

·workingonornearotherelectricalsourcesorelectricalsystemsconnectedtoorclosetotheOCLsystemanditsreturncircuit.

Iftherearenootherrulesorprocedures,theprinciplesdescribedinthisdocumentbeappliedtooverheadcontactlinesystemswithothernominalvoltages.

2Normativereferences

Thefollowingdocumentsarereferredtointhetextinsuchawaythatsomeoralloftheircontentconstitutesrequirementsofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.

EN50122-1:2011,Railwayapplications-Fixedinstallations-Electricalsafety,earthingandthereturn

circuit-Part1:Protectiveprovisionsagainstelectricshock

3Terms,definitions,symbolsandabbreviatedterms

3.1Termsanddefinitions

Forthepurposesofthisdocument,thefollowingtermsanddefinitionsapply.

ISOandIECmaintainterminologicaldatabasesforuseinstandardizationatthefollowingaddresses:

·IECElectropedia:availableat

/

·ISOOnlinebrowsingplatform:availableat

/obp

3.1.1General

charged

qualifiesanentityhavingnon-zeroelectriccharge[SOURCE:IEC60050-113:2011,113-06-26]

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contactline

conductorsystemforsupplyingelectricenergytovehiclesthroughcurrent-collectingequipment

Note1toentry:Thisincludesallcurrent-collectingconductorsandconductingrailsorbars,includingthefollowing:

reinforcingfeeders;

cross-trackfeeders;

disconnectors;

sectioninsulators;

over-voltageprotectiondevices;

supportsthatarenotinsulatedfromtheconductors;

insulatorsconnectedtoliveparts;

droppers;

.auxiliarycatenarywires;

stitchwires;

along-trackfeeders;

butexcludingotherconductors,suchasearthwiresandreturnconductors.

[SOURCE:IEC60050-811:2017,811-33-01,modified-"Along-trackfeeders"hasbeenaddedinthenote1toentry]

contactlinesystem

supportsystemandcontactlinesupplyingelectricenergytovehiclesthroughcurrent-collectingequipment

Note1toentry:Thecontactlinesystemcancomprise:

thecontactline,

.mastsandfoundations,

supportsandanycomponentsregisteringtheconductors,

●cross-spansorcables,

tensioners,

otheralongtrackconductorssuchasfeeders,earthwiresandreturnconductorswhensupportedfromthesamemastsasthecontactline,

conductorsconnectedpermanentlytothecontactlineforsupplyingotherelectricalequipmentsuchaslighting,signaloperation,pointcontrolandpointheating.

[SOURCE:IEC60050-811:2017,811-33-59]

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dead,adj

DEPRECATED:de-energized,adj

atanelectricpotentialequaltoornotsignificantlydifferentfromthatofearthattheworklocation

[SOURCE:IEC60050-651:2014,651-21-09,modified-"worksite"hasbeenreplacedwith“worklocation”,Note1hasbeenremoved]

electricaldanger

riskofelectricalinjurywhenelectricalenergyispresentinanelectricalinstallation[SOURCE:IEC60050-651:2014,651-26-07]

electricalhazard

potentialsourceofharmwhenelectricenergyispresentinanelectricalinstallation

Note1toentry:Theterm"harm"inthiscontextrelatestodamagetoeitherpersonsand/orelectricalinstallations.

[SOURCE:IEC60050-651:2014,651-26-05,modified-Thenote2toentryandthesourceISO-IECGuide51:1999havebeenremoved]

electricalinjury

anyphysicaldamage(includingdeath)toapersoncausedbyelectricshock,electricburn,electricalexplosionorarcing,orfromfireorexplosioninitiatedbyelectricenergy

[SOURCE:IEC60050-651:2014,651-26-08,modified-TheNote1toentryhasbeenremoved]

electricalinstallation,<inrailwayfixedinstallation>

assemblyofelectricalequipmentformingtheoverheadcontactlinesystemanditsassociatedreturncircuitusedfordistributionand/oruseofelectricenergy

electricalrisk

combinationoftheprobabilityofthehazardarisingandtheseverityoftheharmwhenelectricenergyispresentinanelectricalinstallation

[SOURCE:IEC60050-651:2014,651-26-06,modified-Thenote1toentryandthesourceISO/IECGuide51:1999havebeenremoved]

0

hazardous-live-part

livepartwhich,undercertainconditions,cangiveaharmfulelectricshock

Note1toentry:Incaseofhighvoltage,ahazardousvoltagemaybepresentonthesurfaceofsolidinsulation.Insuchacasethesurfaceisconsideredtobeahazardous-live-part.

[SOURCE:IEC60050-826:2004,826-12-13,modified-TheNote1hasbeenadded]

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1

livepart,<inelectrictraction>

conductororconductivepartintendedtobeenergizedinnormaluse

Note1toentry:Thisconceptdoesnotnecessarilyimplyariskofelectricshock.

Note2toentry:Byconvention,thisdoesnotincludetherunningrailsandpartsconnectedtothem.

[SOURCE:IEC60050-811:2017,811-36-23]

2

nominalvoltage,<ofanelectricalinstallation>

valueofthevoltagebywhichtheelectricalinstallationorpartoftheelectricalinstallationisdesignatedandidentified

[SOURCE:IEC60050-826:2004,826-11-01]

3

operation

combinationofactivitiesincludingworkactivitiesnecessarytopermitanelectricalinstallationtofunctionNote1toentry:Theoperationincludessuchmattersasswitching,controlling,monitoringandmaintenance.

[SOURCE:IEC60050-651:2014,651-26-02modified-TheNote1toentryhasbeenmodifiedforthescopeofthisdocument;theNote2toentryhasbeenremoved]

4

overheadcontactline

catenary

OCL

contactlineplacedaboveorbesidetheupperlimitofthevehiclegaugeandsupplyingvehicleswithelectricenergythroughroof-mountedcurrentcollectionequipment

[SOURCE:IEC60050-811:2017,811-33-02,modified-Abbreviatedterm“OCL”hasbeenadded]

5

protectivemeasure

measureintendedtoachieveadequateriskreduction,implemented:

·bythedesigner(inherentdesign,safeguardingandcomplementaryprotectivemeasures,informationforuse)and

·bytheuser(organization,safeworkingprocedures,supervision,training,permit-to-worksystems,provisionanduseofadditionalsafeguards,useofpersonalprotectiveequipment)

[SOURCE:IEC60050-903:2013,903-01-17]

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reinforcedinsulation

insulationofhazardous-live-partswhichprovidesprotectionagainstelectricshockequivalenttodouble

insulation

Note1toentry:Reinforcedinsulationmaycompriseseverallayerswhichcannotbetestedsinglyasbasicinsulationorsupplementaryinsulation.

[SOURCE:IEC61140:2016,3.10.4]

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7

returncircuit

allconductorswhichformtheintendedpathforthetractionreturncurrentandthecurrentunderaultconditions

Note1toentry:Theconductorscanbeforexample:

●runningrails;

returnconductorrails;.returnconductors;

●returncables.

[SOURCE:IEC60050-811:2017,811-35-01]

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(effective)touchvoltage

voltagebetweenconductivepartswhentouchedsimultaneouslybyahumanorlivestock

Note1toentry:Thevalueoftheeffectivetouchvoltagemaybeappreciablyinfluencedbytheimpedanceofthepersonorthelivestockinelectriccontactwiththeseconductiveparts.

Note2toentry:Theconductivepaththroughthehumanbodyisconventionallyfromhandtobothfeet(horizontaldistanceof1m)orfromhandtohand

[SOURCE:IEC61140:2016,3.8.1,modified-TheNote2hasbeenadded]

3.1.2Personnel,organizationandcommunication

designatedpersonincontrolofanelectricalinstallation

EI

personwhohasbeendesignatedtobethepersonwithdirectmanagementresponsibilityfortheoperationofanelectricalinstalation

Note1toentry:Allorpartsofthisresponsibilitymaybedelegatedtoothersasrequired.

[SOURCE:IEC60050-651:2014,651-26-10,modified-Thenote2toentryhasbeenremoved]

designatedpersonincontrolofanelectricalinstallationduringworkactivities

EW

personwhohasbeendesignatedtoberesponsiblefortheelectricalinstallationandforcreatingandmaintaininganelectricallysafeworkenvironmentattheworklocationduringtheworkactivities

Note1toentry:Thispersonhastojudgethepossibleeffectsoftheworkactivitiesontheelectricalinstallationorpartsofitwhichareinhisorherresponsibilityandtheeffectsoftheelectricalinstallationonpersonscarryingouttheworkactivities.Someofthesedutiescanbeundertakenbydifferentpersons(see4.1,4.2and4.3).

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designatedpersonincontrolofaworkactivity

WA

personwhohasbeendesignatedtobethepersonwithdirectmanagementresponsibilityfortheworkactivity

Note1toentry:Partsofthisresponsibilitymaybedelegatedtoothersasrequired.

[SOURCE:IEC60050-651:2014,651-26-09,modified-Thenote2toentryhasbeenremoved]

(electrically)instructedperson

personadequatelyadvisedorsupervisedbyelectricallyskilledpersonstoenablehimorhertoperceiverisksandtoavoidhazardswhichelectricitycancreate

[SOURCE:IEC61140:2016,3.31]

notification

messagesorinstructionswhichareeitherverbalorinwritingassociatedwithoperationofanyelectricalinstallation

[SOURCE:EN50110-1:2014,3.2.7]

ordinaryperson

personwhoisneitheraskilledpersonnoraninstructedperson[SOURCE:IEC60050-826:2004,826-18-03]

(electrically)skilledperson

personwithrelevanteducationandexperiencetoenablehimorhertoperceiverisksandtoavoidhazardswhichelectricitycancreate

[SOURCE:IEC60050-195:1998,195-04-01]

3.1.3Zonesanddistancesduringworkactivities

dangerzone

inthecaseofhighvoltage,arealimitedbytheminimumclearancearoundhazardous-live-partswithoutcompleteprotection

Note1toentry:Enteringthedangerzoneisconsideredthesameastouchinghazardous-live-parts.

Note2toentry:TheouterlimitofthedangerzoneisdenotedasthedistanceDR(seeAnnexA).

[SOURCE:EN61140:2016,3.35,modified-TheNotetoentry2textisaddedtoclarifytheconcept'susagewithinthisdocument]

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ergonomicdistance

De

distanceinairaddedtoD,totakeintoaccountexpectedandinadvertentmovementanderrorsinjudgementofdistanceswhileperformingwork

[SOURCEIEC60050-651:2014,651-21-13,modified-"DE"and“expectedand”havebeenadded,"theelectricaldistance"hasbeenreplacedbyDL,theNote1toentryhasbeenremoved]

minimumapproachdistance

DA

minimumdistanceinairtobemaintainedduringworkactivitybetweenanypartofthebodyofaworker,includinganyobject(excepttoolsappropriateforliveworking)beinghandleddirectly,andanypart(s)atdifferentelectricpotential(s)

Note1toentry:Inthisdocumenttheminimumapproachdistanceismeasuredfromthenearesthazardous-live-part.

Note2toentry:Insulatingpartoftheinsulatorsaretypicallyconsideredaslivepart.Exceptionsarethepartsofsyntheticropeswhicharefurtherawayfromlivepartsthanthecreepagelength(accordingtoEN50345)withaminimumof1m.

Note3toentry:Thisconceptdoesnotapplywhenprotectivedevicesaccordingto5.32areused.

Note4toentry:lowestvalueofminimumapproachdistanceisnamedDL(seeAnnexA)

[SOURCE:IEC60050-651:2014,651-21-11-modified-"Duringworkactivity"wasaddedinthedefinition;note1toentrytonote3toentryhavebeenmodified;note4toentryhasbeenadded]

vicinityzone

limitedspaceoutsidethedangerzonewherespecificprecautionsaretakentoavoidencroachingintothedangerzone

Note1toentry:Encroachingintothedangerzonewillcreateanelectricalhazard.

Note2toentry:TheouterlimitofthevicinityzoneisdenotedasthedistanceDv(seeAnnexA).

[SOURCE:IEC60050-651:2014,651-21-04,modified-'liveworkingzone'hasbeenreplacedby'dangerzone',notes2toentryhasbeenrewordedandnote3toentryhasbeenremoved]

worklocation

anysite,placeorareawhereaworkactivityistobe,isbeing,orhasbeencarriedout

[SOURCE:IEC60050-651:2014,651-26-03,modified-Thenote1toentryhasbeenremoved]

workingzone

three-dimensionalspacedescribingthephysicallimitsofmovementnecessaryduringaworkactivity

Note1toentry:Theouterlimitincludesintendedmovementsduringaworkactivity,butexcludesunintendedmovements.UnintendedmovementsareincludedintheergonomicdistanceDE(seeAnnexA).

Note2toentry:Thistermcanbeappliedtoapersoninvolvedintheworkactivity,includinganyobject(excepttoolsappropriateforliveworking)beinghandleddirectlybythem.Thetermcanalsobeappliedtomachineryandequipmentoperatedbyapersoninvolvedintheworkactivity(e.g.forlifting,materialshandling,etc.).

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3.1.4Working

authorization

formalapprovalinwritingorinstruction[SOURCE:EN50110-1:2013,3.4.9]

deadworking

workactivityononeormoresectionsofanelectricalinstallation,whichisdead,carriedoutafterhavingtakenallmeasurestopreventelectricaldanger

[SOURCE:EN50110-1:2013,3.4.8,modified-"electricalinstallations”hasbeenreplacedby"oneormoresectionsofanelectricalinstallation",“areneitherlivenorcharged”hasbeenreplacedby"isdead"]

earthing

connectingpartsofthecontactlinetotheearthforthepurposeofelectricalsafetyduringdeadworking

isolation

functionintendedtodisconnectandmaintainforreasonsofsafetyadequateclearancefromanysourceofelectricenergy

Note1toentry:Isolationcaninvolveoneormorepartsoftheelectricalinstallation.

[SOURCE:IEC61140:2016,3.41modified-Note1toentryhasbeenadded]

liveworking

livework

activityinwhichaworkermakescontactwithenergizedpartsorencroachesinsidetheliveworkingzone

witheitherpartsofhisorherbodyorwithtools,devicesorequipmentNote1toentry:Liveworkingisperformedusingspecificmethodssuchas:

●hotstickworking,

insulatinggloveworking,barehandworking,

useoflivelinetools(e.g.toremoveobjectsfromandforinspectiononoverheadcontactline),useoflivelineheightandstaggergauges.

[SOURCE:IEC60050-651:2014,651-21-01,modified-Note1toentryhasbeenreplaced,RailwayexamplesaddedinNote1toentry;Notes2and3toentryhavebeendeleted]

shortcircuiting

connectingpartsofthecontactlinetothereturncircuitforthepurposeofelectricalsafetyduringdeadworking

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workactivity

formofworkwherethereisthepossibilityofanelectricalhazard

[SOURCE:EN50110-1:2013,3.4.1,modified-"Electricalornon-electrical"hasbeenremoved]

workingnearhazardous-live-parts

activityinwhichaworkerwithpartofhisorherbody,withatoolorwithanyotherobjectcanenterintothevicinityzonewithoutencroachingintothedangerzone

Note1toentry:NewtermanddefinitionderivedfromIEC60050-651:2014,651-21-02

3.1.5Protectivedevices

physicalmeasure

partusedtolimitworker'smovementsinawaywhichhelpsensuretheapproachdistanceisrespectedduringworkactivity

Note1toentry:Thismeasurereducestheworker'sdependenceonjudgementtoensuretheyrespecttheapproachhdistance.

(electrically)protectivebarrier

partprovidingprotectionagainstcontactbyahumanorlivestockwithalivepartfromanyusualdirectionofaccess

[SOURCE:EN61140:2016,3.13]

protectivedevice

partusedduringworkactivitytophysicallypreventapersonorobjecttheyareusingfromenteringthedangerzone

Note1toentry:Thesemeasuresdonotdependuponaworker'sjudgementtoprevententryintothedangerzone.

Note2toentry:Examplesinclude,electricallyprotectivebarrier,electricallyprotectiveobstacle,aphysicalreachlimitingdeviceorequipment.

(electrically)protectiveobstacle

partpreventingunintentionalcontactbyahumanorlivestockwithalivepart,butnotpreventingsuchcontactbydeliberateaction

[SOURCE:EN61140:2016,3.12]

3.2Symbols

DAMinimumapproachdistance(foraworkactivity)(see

)

DEErgonomicdistance(foraworkactivity)(see

)

DLLowestvalueofDA(whenDE=0)(seeAnnexA)

DRDistancetotheouterlimitsofthedangerzone(seeAnnexA)

DvDistancetotheouterlimitsofthevicinityzone(seeAnnexA)

MMargin(seeAnnexA)

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3.3Abbreviatedterms

EIDesignatedpersonincontrolofanelectricalinstallation(see

)

EWDesignatedpersonincontrolofanelectricalinstallationduringworkactivities(see

)

OCLOverheadcontactline(see

4)

WADesignatedpersonincontrolofaworkactivity(see

)

4Basicprinciples

4.1Electricalsafetyforworkactivity

4.1.1General

Thefollowingprimarystepsshallbeperformedinordertomanageelectricalsafetywhenworkingonorneartheoverheadcontactlineand/oritsassociatedreturncircuit:

·Planningforanelectricallysafeworkenvironment;

·Creatinganelectricallysafeworkenvironment;

·Maintainingtheelectricallysafeworkenvironmentduringworkactivities;

·Restoringtheplannedoperatingcondition.

Responsibilitiesspecifiedinthisstandard,shallbeidentified,documentedandcarriedoutbypersonswiththenecessarylevelofcompetence.

4.1.2Planningforanelectricallysafeworkenvironment

Beforecarryingoutanyworkactivityonornearanoverheadcontactlineand/oritsassociatedreturncircuitanassessmentoftheelectricalrisksshallbemade.

Thisassessmentshall:

·specifytheworkactivityandhowitwillbecarriedout;

·identifytherelatedelectricalhazards;

·specifyhowtheworkactivitywillbecarriedouttoensureelectricalsafety(seeClauses5and6);

·ensurethattheelectricalprotectionoftheenergizedoverheadcontactlinesystemremainseffectiveforthedurationoftheworkactivity;

·ensurethattouchvoltagesremainwithinthepermissiblelimitsspecifiedinEN50122-1:2011,Clause9forthedurationoftheworkactivity;

·specifywhenandwhatprotectivemeasurestopreventelectricaldangerwillbeimplemented;