Iec 62870 2015

IEC 62870 Edition 1 0 201 5 09 INTERNATIONAL STANDARD NORME INTERNATIONALE Electrical installations for l ighting and beaconing of aerodromes –Safety secondary circuits in series circuits – General sa[.]

Elect rical inst al at ions for l ght ing and beaconing of aerodromes – Safety

secondary circuit s in series circuits – General safety requirement s

Inst al at ions élect riques pour l éclairage et le bal sage des aérodromes –

Circuit s secondaires de sécurit é dans de circuit s série – Ex igences générales

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Elect rical inst al at ions for l ght ing and beaconing of aerodromes – Safety

secondary circuit s in series circuits – General safety requirement s

Inst al at ions élect riques pour l éclairage et le balsage des aérodromes –

Circuit s secondaires de sécurit é dans des circuit s série – Ex igences générales

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FOREWORD 3

INTRODUCTION 5

1 Sco e 6

2 Normative ref eren es 6

3 Terms an def i ition 7

4 Req irements f or the SELV/PELV s p ly 9

4.1 General 9

4.2 SELV/PELV-saf ety demarcation l ne in an AGL series circ it 10 4.3 En ironmental con ition 1

4.4 Degre of protection provided by en los res 1

4 5 Electromag etic comp tibi ty (EMC) 1

4.5.1 Limits of electromag etic emis ion 1

4.5.2 Limits of immu ity 12 4.6 Markin 12 4.6.1 Markin of the SELV/PELV p wer s p ly 12 4.6.2 Markin at the in tal ation location 12 4.7 Protection again t electric s oc 12 4.7.1 Basic req irements 12 4.7.2 Protective me s re to b a pl ed 12 4.7.3 Protective se aration f rom the primary series circ it 13 4.7.4 As embl es in the SELV/PELV s p ly 13 4.7.5 L ad of the SELV/PELV s p ly 13 4 8 Interaces 1

4 4.8.1 Sup ly u it 14 4.8.2 Con ectors 14 5 Testin 14 5.1 Typ tests 1

4 5.2 Routine tests 14 An ex A (informative) Sy tem desig selection 15 Biblogra h 16 Fig re 1 – Saf ety demarcation l ne in a SELV s stem 10 Fig re 2 – Saf ety demarcation l ne in a PELV s stem 1

Ta le A.1 – Comp rison of c aracteristic of PELV an SELV 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION

_

SAFETY SECONDARY CIRCUITS IN SERIES CIRCUITS –

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International Stan ard IEC 6 8 0 has b en pre ared by IEC tec nical commite 9 :

Electrical in tal ation f or lg tin an b aconin of a rodromes

The text of this stan ard is b sed on the f ol owin doc ments:

Ful inf ormation on the votin f or the a proval of this stan ard can b foun in the re ort on

votin in icated in the a ove ta le

This publ cation has b en draf ted in ac ordan e with the ISO/IEC Directives, Part 2

The commit e has decided that the contents of this publ cation wi remain u c an ed u ti

the sta i ty date indicated on the IEC we site u der "ht p:/webstore.iec.c " in the data

related to the sp cif i publ cation At this date, the publ cation wi b

• reconfirmed,

• with rawn,

• re laced by a revised edition, or

IMPORTANT – The 'colour inside' logo on the cov r pa e of this publ c tion indic te

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With a few ex e tion , a ronautical grou d l g tin is desig ed for series circ it tec nolog

o eratin with a con tant c r ent an a maximum input voltage of 5 0 0 V a.c rms, in lu in

toleran es The input voltage to the series circ it is con tantly adju ted by the con tant

c r ent reg lator to maintain the series circ it c r ent ir esp ctive of the variation in the lo d

The pro erties an c aracteristic of the con tant c r ent reg lators are provided in

IEC 618 2 Due to the stru ture of the series circ it, i.e a series con ection of al lo d , the

u ual protective devices f or p rson el protection of an IT, TT or TN network can ot b

a pl ed

Aeronautical grou d l g tin is def i ed as an l g t provided as an aid to air navigation an as

s c is s bject to sp cif i req irements with resp ct to its resi en e, avai a i ty, an

service bi ty levels Therefore, in ulation f aults in the series circ it are often tolerated, an

do not le d to the automatic dis on ection of the electrical s p ly to the series circ it

In view of the a ove IEC 618 1 states that no work of an kin is normal y p rmit ed on lve

series circ its without first con u tin a s ita le an s f ficient Ris As es ment an u in

a pro riate protective eq ipment ac ordin to IEC 618 1

The electrical c aracteristic of the con tant c r ent series circ its are often conf used with

those of IT, TT or TN network , i.e con tant input voltage, eq ipment con ected in p ral el,

an a lo d-de en ent c r ent In practice, it is not alway e s to as ig rated voltages

cor ectly to in ivid al comp nents of the series circ it or to determine p s ible tou h

voltages In a con tant c r ent series circ its, the rated voltage of the eq ipment in the series

circ it an the maximum tou h voltage feq ently ex e d the normal main input voltage

In a series circ it in tal ation the series circ it input voltage is divided in pro ortion to the

internal resistan es of the variou lo d The rated voltage, i.e the voltage b twe n the input

l nes of the eq ipment, is defined by the series circ it c r ent that flows throu h the

eq ipment an its input imp dan e Sin e input imp dan e de en s on the eq ipment desig

an the series circ it c r ent is con tant, the input voltage remain the same f or e c item of

eq ipment As a res lt of the provision of c r ent control in the series circ it the series circ it

input voltage is lo d-de en ent an cor esp n s to the s m of al p rtial voltages in the

series circ it

This is dif ferent to determinin the maximum p s ible tou h voltage to e rth in a series

circ it Sin e one or more e rth f aults, of varyin resistan e to e rth, mayb present, the

tou h voltage to e rth may as ume any value up to the maximum series circ it input voltage

de en in on the location of the e rth fault an the eq ipment in tal ed in the series circ it

Therefore when determinin the dielectric stren th again t e rth p tential it is u ual to take

the maximum series circ it input voltage Su h p c l arities of the series circ it have b en

taken into ac ou t in the req irements for lamp s stems in this stan ard

Sin e there are only a f ew ef fective safety fe tures avaia le for p rson el protection in series

circ it tec nolog the protective me s re “Saf ety extra low voltage (SELV) an “Protective

extra low voltage (PELV) is a pl ed in this stan ard for the s p ly of lamp s stems This

me s re is common practice an can resort to the a pl cation of wel -k own an ac e ted

methodology The introd ction of SELV/PELV in this typ of a pl cation has b en made

p s ible by the introd ction of new i uminant tec nology that has lower p wer req irements

an hen e req ires a lower voltage s pply

NOT This sta d rd is b s d o S LV s e if i atio a c rdin to IEC 6 3 4-4-41 a d IEC 615 8-

ELECTRICAL INSTALLA TIONS FOR

This International Stan ard sp cifies protective provision for the o eration of lamp s stems

p wered by series circ its in a ronautical grou d l g tin

The protective provision des rib d here ref er only to secon ary s p ly s stems f or lo d

that are electrical y se arated f om the series circ it

This stan ard sp cifies the level of SELV, an alternatively PELV, u der con ideration of

ad itional p rson el protection d rin work on lve secondary circ its by electrical y s i ed

p rson This stan ard also covers the sp cial o erational f eatures of a ronautical grou d

l g tin an ad res es the level of trainin an the req irements f or maintenan e proced res

detai ed in IEC 618 1

The req irements an tests are inten ed to set a sp cif i ation f ramework for s stem

desig ers, u ers, an maintenan e p rson el to en ure a safe an economic u e of electrical

s stems in in tal ation f or the b aconin of a rodromes

This stan ard complements existin IEC Airield-Grou d- Lig tin (AGL) stan ard an can

b u ed as a desig sp cification

The f ol owin doc ments, in whole or in p rt, are normatively ref eren ed in this doc ment an

are in isp n a le f or its a pl cation For dated ref eren es, only the edition cited a ples For

u dated referen es, the latest edition of the referen ed doc ment (in lu in an

amen ments) a pl es

IEC 6 3 4-4-41, L w-v lt ag electric l inst al lat ions – Part 4-41: P rote tion for safety –

Prot ect ion a ainst el ectric sh c

IEC 6 417, Gra hic l symb ls for use o e uipme t (avai a le f rom: htp:/www.gra hical

-s mb ls.inf o/eq ipment

IEC 6 5 9, De re s of protection pro id ed b e cl osures (IP Cod e)

IEC 610 0-6-2, El ectroma n t ic c mp t ibil ity (EMC) – P art 6-2: Ge eric stand ards –

I mmu ity for ind ustrial e viro me ts

IEC 610 0-6-4, El ectroma n t ic c mp t ibil ity (EMC) – P art 6-4: Ge eric stand ards –

Emis ion sta dard for industrial e viro me ts

IEC 61 4 , P rot ection a ainst el ectric sh c – Commo asp cts for install t io a d

e uipme t

IEC 615 8-2-4, Safety of tra sformers, re ct ors, p wer su ply units a d simil ar prod ucts for

su ply v l ta es u t o 1 10 V – Part 2-4: P art ic l ar re uireme ts a d tests for isol at ing

tra sformers a d p wer su ply u its inc rp rating isolatin tra sformers

IEC 615 8-2-6, Safety of tra sformers, re ct ors, p wer su ply units a d simil ar prod ucts for

su ply volt ag s u t o 1 10 V – Part 2-6: Partic lar re uireme ts a d t ests for safety isolat in

tra sformers a d p wer su ply u its inc rp rating safety isol ating tra sformers

IEC 618 1, Ele tric l install at ions for l ight ing a d b a o in of a rodromes – Mainten n e of

a ro a t ic l gro nd lighting c nsta t c re t series circ its

IEC 618 2, El ectric l instal l at ions for l ight in a d b a o ing of a rodromes – Co stant

c re t re ul at ors

IEC 618 3, Electric l instal lations for l ighting a d b a o in of a rodromes – AGL series

tra sformers

CISPR 1 , Industrial , scient ific a d med ic l e uipme t – Rad io-fe u n y disturb n e

c ara terist ics – Limits a d methods of me sureme t

CISPR 2 , Informat io t ec n log e uipme t – Rad io d ist urb n e c ara teristics – Limits a d

an thin u ed, inten ed to b u ed or in tal ed f or u e, to generate, provide, tran mit,

tran f orm, rectify, con ert, con u t, distributes, control, store, me s re or u e electrical

in ulation of hazardou l ve p rts providin b sic protection

Note 1 to e try: Th term “b sic in ulatio ” d e n t in lu e in ulatio u e e clu iv ly f or fu ctio al p rp s s

3.5

ele tric l y s i le person

p rson with relevant ed cation an exp rien e to ena le him or her to p rceive ris s an to

avoid hazard whic electricity can cre te

[SOURCE: IEC 6 05 -19 :19 8,19 -0 -01]

voltage values of whic do s not ex e d values in 4.7.2 , b twe n con u tors, or b twe n

an con u tor an ref eren e e rth, in an electric circ it whic has galvanic se aration fom

the s p lyin electric p wer s stem by s c me n as a se arate-win in tran former

3.10

SELV s stem

electrical s stem in whic the voltage can ot ex e d the value of extra-low voltage:

– u der normal con ition , an

– u der sin le- ault con ition , in lu in e rth f aults in other electric circ its

Note 1 to e try: S LV is th a bre iatio for s fety e tra low v lta e

Note 1 to e try: S LV circ it d e n t in lu e th h u in of th lg t fixture

[SOURCE: IEC 615 8-1:2 0 , 3.7.17, modified – ad ition of a note to entry]

– b sic in ulation an electrical y protective s re nin or

– reinforced in ulation

3.13

prote tiv e tra low volta e circ it

PELV-circ it

ELV circ it with protective se aration fom other circ its an whic , for fu ctional re son ,

may b earthed an /or the exp sed con u tive p rts of whic may b e rthed

Note 1 to e try: PELV-circ its are u e wh re th circ its are e rth d a d S LV is n t re uire

voltage b twe n con u tive p rts when tou hed simultane u ly by a p rson or an animal

Note 1 to e try: Th v lu of th eff ectiv to c v lta e ma b a pre ia ly influ n e b th imp d n e of th

p rs n or th a imal in ele tric c nta t with th s c n u tiv p rts

Note 1 to e try: Th lumin ire is a a p ratu whic distrib te , fiters or tra sforms th lg t tra smite f rom

o e or more lamp a d whic in lu e al th p rts n c s ary for s p ortin , aimin , f i in a d prote tin th

lamp , b t n t th lamp th ms lv s a d, wh re n c s ary, circ it a xi arie to eth r with th me n for

c n e tin th m to s p ly

4 Requireme ts f or the SELV/PELV supply

L mp s stems f or u e in a ronautical grou d l g tin s al b desig ed f or u e in a series

circ it The maximum p wer ratin s of the series circ it s p ly are given by the con tant

c r ent reg lators ac ordin to IEC 618 2

If the lamp s stems are desig ed for other c r ent ran es, s c information s al b provided

by the man f acturer

The desig of the saf ety secon ary circ it s al s p ort saf e workin con ition for electrical y

s i ed p rson

The maintenan e practices s al f olow IEC 618 1 When con iderin lf e work on the

secon ary circ it the ris as es ment s ould take into ac ou t the nature of the work (fault

f i ding, testin , an re air), the nature of the hazard present, an the provision of

SELV/PELV desig s

The recommen ation is to implement a PELV desig b cau e it is con idered the more

practical solution over complete lve time of the in tal ation but with the same saf ety level as a

SELV desig If this req irement could not b f ulfi ed then it has to b con idered that you

ne d to enforce maintenan e ef fort to ac ieve a s ita le in ulation level to implement the

SELV desig

4.2 SELV/PELV-s fety demarc tion l ne in a AGL s rie circ it

Fig re 1 an Fig re 2 b low s ow the extent of the saf ety secon ary s stem The saf ety

secon ary s stem (5 V a.c or 12 V d.c level) is al circ itry b low the das ed saf ety

Figure 2 – Safety demarc tion l n in a PELV s stem

The PELV-s stem can b u ed where local reg lation req ire an e rth (b n in of a l ve

con u tor) to b provided

Imp rtant notice: It is stron ly recommen ed that SELV an PELV s stems are not mixed on

a sin le circ it

4.3 Environme tal condition

L mp s stems s al b desig ed f or contin ou outdo r o eration without an deratin f actor,

u der the f ol owin en ironmental con ition :

• temp rature ran e fom − 0 °C to + 5 °C;

• relative humidity fom 10 % to 10 %

4.4 De re of prote tion provide by e clos re

The degre of protection again t contact with con u tin p rts or the in res of sol d o jects

an l q id s al b in icated by the IP codin ac ordin to IEC 6 5 9

Where the s p ly is inten ed to b in taled outdo rs the f ol owin IP-grade s al a ply:

• u dergrou d IP 6 ,

• a ove grou d IP 5

4.5 Ele troma netic compatibi ty (EMC)

4.5.1 Limits of ele troma netic emis ion

The SELV/PELV s p ly s al comply with the req irements given in the EMC generic stan ard

IEC 610 0-6-4 The l mits of electromag etic emis ion s al comply with CISPR 1 , clas B

4.5.2 Limits of immunity

The SELV/PELV s p ly s al comply with the req irements given in the generic stan ard for

in u trial en ironments IEC 610 0-6-2 The immu ity l mits an method of me s rement of

CISPR 2 s al b compl ed with

4.6 Marking

4.6.1 Marking of the SELV/PELV power s pply

Eac SELV/PELV s p ly of it s al b p rmanently marked The markin s al contain the

f ol owin inf ormation:

• u ambig ou typ desig ation of the man facturer;

• name of the man f acturer of the as embly;

• nominal input c r ent;

• nominal output c r ent;

• maximum output p wer (W an VA);

• markin of the as embly as clas I I (SELV) with s mb l original 518 of IEC 6 417

(Roman I I within a rhombu )

The SELV/PELV markin s al b avai a le to maintenan e p rson el an e si y re da le in

the normal in tal ation p sition (se 4.7.4)

4.6.2 Marking at the instal ation loc tions

The location of a l g t f i ture f ed by a SELV/PELV p wer s p ly s al b marked as

SELV/PELV The markin s al b cle rly re da le to alow maintenan e p o le to confirm

SELV / PELV con ition b f ore startin an work on the in tal ation If the SELV/PELV s p ly

wi b re laced by a non-SELV/PELV s p ly the markin s al b removed or p rmanently

• l mitation of voltage at the output of the SELV/PELV s p ly an

• protective-se aration of the SELV/PELV s p ly f om al circ its other than SELV an

PELV an

• simple-se aration of the SELV/PELV s p ly f om other SELV/PELV s p ly

s al b provided

For a SELV s p ly, o erational e rthin of active p rts nor the intentional con ection of p rts

to a protective con u tor or to an e rth con u tor ac ordin to IEC 61 4 is not p rmit ed

Where the safety secon ary s stem is expl citly defined as a PELV s p ly, the PELV circ its

an /or exp sed con u tive p rts of eq ipment s p l ed by the PELV circ it may b e rthed

In location where protective s re nin is u ed f or the purp se of protective se aration the

protective s re n s al b se arated f rom e c adjacent circ it by b sic in ulation inten ed

f or the hig est voltage present

The maximum SELV/PELV s al not ex e d the f ol owin values:

• 5 V a.c for a.c voltages in the 15 Hz to 10 Hz ran e,

• 120 V d.c f or direct voltages with a maximum harmonic content of 10 % of the direct

voltage eff ective value

SELV/PELV an non-SELV/PELV circ its s al not b car ied in the same ca le

4.7.3 Prote tiv s paration from the primary s rie circ it

The p wer s p ly u it of the lamp s stems with the SELV/PELV s p ly s al provide a

galvanic, safe se aration fom the primary side of the series circ it

The input voltage of one sin le SELV /PELV s p ly is defined as the voltage b twe n the two

• reinf orced in ulation rated f or the hig est voltage present, or

• protective s re nin with the protective s re n b in se arated f om e c adjacent circ it

by b sic in ulation rated for the adjacent circ it voltage, or

• a combination of these provision

If the con u tors of the se arated circ it are contained together with the con u tors of other

circ its in a multi-con u tor ca le or in another groupin of con u tors, they s al b

in ulated, in ivid al y or col ectively, f or the hig est voltage present, so that double in ulation

is ac ieved

If an comp nent is con ected b twe n the se arated circ its, that comp nent s al comply

with the req irements f or protective imp dan e devices ac ordin to IEC 61 4

4.7.4 As embl e in the SELV/PELV s p ly

If as embl es in the SELV/PELV s p ly are con ected to the p wer s p ly by me n of an

external inter ace they s al b desig ed as Clas I eq ipment ac ordin to IEC 61 4

When a SELV s p ly is c osen there s al b no provision f or the con ection of l ve p rts to

e rth

The en los re of an as embly may b provided with an e rth terminal if it is neces ary f or an

e rth to b provide for re son other than p rson el protection

An e rth con ection may b neces ary to integrate an en los re into a l g tnin protection

s stem

4.7.5 Loa of the SELV/PELV s p ly

Eq ipment marked as Clas I I s al only b u ed in SELV or PELV s stems

4.8 Interfa e

4.8.1 Supply unit

The electrical s p ly to the lamp s stem is u ual y provided by the series circ it Al

s bs stems havin a direct galvanic con ection to the primary series circ it s al comply with

IEC 618 3 (AGL series tran formers)

If the electrical s p ly of a series circ it, or another voltage s p ly, is inten ed to have a

nominal voltage les than 1 0 0 V a.c the dielectric stren th can b determined ac ordin to

IEC 615 8-2-4

4.8.2 Conne tors

The l ve side of the circ it s al b eq ip ed with the soc et

Plug an soc et-outlets in SELV an PELV s stems s al comply to IEC 6 3 4-4-41 with the

f ol owin req irements:

• plu s s al not b a le to enter soc et-outlets of other non AGL voltage s stems;

• soc et outlets s al not admit plu s of other non AGL voltage s stems

5 Testing

5.1 Type te ts

The tests s al as ure that the SELV/PELV s p ly compl es with the a pl ca le IEC stan ard

ref eren ed in 4.1 to 4.8.2

Al a pl ca le typ tests of dielectric stren th s al b car ied out on a pl ca le p rts of the

SELV/PELV s p ly havin a galvanic con ection to the series circ it on one side ac ordin to

IEC 618 3

The a plca le tests for saf ety isolating tran formers ac ordin to IEC 615 8-2-6 s al b

car ied out

The tests have b en p s ed if al req irements have b en fulfi ed

The tests s al b doc mented with al res lts cle rly ta ulated in lu in a cle r des ription of

the stru tural con ition of u its after the completion of e c test

If a SELV/PELV s p ly is modified in an way that this has an eff ect on the saf ety or b sic

f un tion of the SELV/PELV s p ly the typ test s al b re e ted

5.2 Routine te ts

Af ter prod ction the man facturer s al s bmit e c as embly to a vis al in p ction, a n

on-destru tive dielectric test ac ordin to the a pl ca le p rts of IEC 615 8-2-6, an a fu ctional

test The f un tional test s al contain the b sic fu ction an compl an e with the maximum

p rmited output voltage f or s p ly u it

The man facturer s al doc ment the typ an s o e of tests in the test in tru tion

Annex A

(inf or mative)

System design selection

To select the rig t s stem desig , the airp rt s ould con ider the diff erent c aracteristic of

the in tal ation (se Ta le A.1 b low)

Table A.1 – Comparison of c ara teristic of PELV a d SELV

Can be combined with an loc l

e rthin req irements

Bibl ogr aphy

IEC 6 0 0-19 :19 8, Int ern tion l Ele trot ec nical Vo a ulary – Part 195: Earthing a d

prot ection a ainst el ectric sh c

IEC 6 0 0-8 6:2 0 , Intern tion l Ele trotec nic l Vo a ul ary – Part 8 6: El ectric l

install ations

IEC 6 0 0-9 3:2 13, Int ern tion l Ele trot ec nic l Vo a ulary – Part 9 3: Risk as es me t

IEC 6 3 4-1, L w-vol t ag ele tric l inst al l tio s – Part 1: Fundame tal prin iples,

as es me t of g n ral c ara terist ics, d efinit ions

IEC TS 612 1, U se of c n e tion l tou h v l ta e l imits – Ap lc tion g id e

IEC 615 8-1:2 05, Safety of p wer tra sformers, p wer su p es, re ctors a d similar

prod ucts – Part 1: Ge eral re uireme ts a d t ests

_ _