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Tiêu đề IEC 60364-6:2016-04 Verification of Low Voltage Electrical Installations
Trường học Unknown University
Chuyên ngành Electrical Engineering
Thể loại Standards Document
Năm xuất bản 2016
Thành phố Geneva
Định dạng
Số trang 104
Dung lượng 2,23 MB

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  • 6.1 Scope (8)
  • 6.2 Normative references (8)
  • 6.3 Terms and definitions (9)
  • 6.4 Initial verification (9)
    • 6.4.1 General (9)
    • 6.4.2 Inspection (10)
    • 6.4.3 Testing (11)
    • 6.4.4 Reporting for initial verification ..................................................................... 1 4 (16)
  • 6.5 Periodic verification ............................................................................................. 1 5 (17)
    • 6.5.1 General ....................................................................................................... 1 5 (17)
    • 6.5.2 Frequency of periodic verification ................................................................. 1 6 (18)
    • 6.5.3 Reporting for periodic verification ................................................................. 1 6 (18)
  • B.1 General ............................................................................................................... 1 9 (21)
  • B.2 Test method for measuring the impedance of floors and walls with a.c (21)
  • B.3 Test electrode 1 (22)
  • B.4 Test electrode 2 (22)
  • C.1 Method C1 – Measurement of earth electrode resistance using an earth (24)
  • C.2 Method C2 – Measurement of earth electrode resistance using a fault loop (25)
  • C.3 Method C3 – Measurement of earth electrode resistance using current (26)
  • F.1 Model schedule for items requiring inspection for initial verification of an (38)
  • F.2 Model inspection schedule of items requiring inspection for an existing (42)

Nội dung

The initial verification ta es place up n the completion of a new in tal ation or completion of an ad ition or an alteration to an existin in talation.. Clau e 6.5 provides req irements

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CONTENTS

FOREWORD 4

6.1 Sco e 6

6.2 Normative referen es 6

6.3 Terms an definition 7

6.4 Initial verification 7

6.4.1 General 7

6.4.2 In p ction 8

6.4.3 Testin 9

6.4.4 Re ortin for initial verification 14 6.5 Periodic verification 15 6.5.1 General 15 6.5.2 Freq en y of p riodic verification 16 6.5.3 Re ortin for p riodic verification 16 An ex A (informative) Estimation of the resistan e value l k ly to b o tained d rin contin ity testin 18 An ex B (informative) Method for me s rin the in ulation resistan e/imp dan e of flo rs an wal s to e rth or to the protective con u tor 19 B.1 General 19 B.2 Test method for me s rin the imp dan e of flo rs an wal s with a.c voltage 19 B.3 Test electrode 1 20 B.4 Test electrode 2 20 An ex C (informative) Me s rement of e rth electrode resistan e – Method C1, C2 an C3 2

C.1 Method C1 – Me s rement of e rth electrode resistan e u in an e rth electrode test in trument 2

C.2 Method C2 – Me s rement of e rth electrode resistan e u in a fault lo p imp dan e test in trument 23 C.3 Method C3 – Me s rement of e rth electrode resistan e u in c r ent clamps 2

An ex D (informative) Guidan e on the a pl cation of the rules of Clau e 6.4 – Initial verification 2

An ex E (informative) Model forms for re ortin 2

An ex F (informative) Model forms for in p ction of electrical in tal ation 3

F.1 Model s hed le for items req irin in p ction for initial verification of an electrical in tal ation 3

F.2 Model in p ction s hed le of items req irin in p ction for an existin electrical in tal ation 4

An ex G (informative) Model s hed le of circ it detais an test res lts 45 An ex H (informative) List of notes con ernin certain cou tries 4

Bibl ogra h 4

Fig re B.1 – Test electrode 1 20 Fig re B.2 – Test electrode 2 21 Fig re C.1 – Me s rement of the e rth electrode resistan e 2

Fig re C.2 – Me s rement of the e rth electrode resistan e u in an e rth fault lo p imp dan e test in trument 2

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Ta le 6.1 – Minimum values of in ulation resistan e 10

Ta le A.1 – Sp cific con u tor resistan e R for co p r wirin at 3 °C de en ent on

the nominal cros -sectional are S for rou h calc lation of con u tor resistan es 18

Ta le E.1 – Electrical in talation verification re ort (new or altered in talation) 2

Ta le E.2 – Electrical in talation con ition re ort (existin in tal ation ) 3

Ta le G.1 – Model s hed le of circ it detai s an test res lts 45

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INTERNATIONAL ELECTROTECHNICAL COMMISSION

Part 6: Verification

1) Th Intern tio al Ele trote h ic l Commis io (IEC) is a worldwid org nizatio for sta d rdizatio c mprisin

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Te h ic l Re orts, Pu lcly Av ia le Sp cific tio s (PAS) a d Guid s (h re fer refere to as “IEC

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in th su je t d alt with ma p rticip te in this pre aratory work Intern tio al g v rnme tal a d n

n-g v rnme tal org nizatio s laisin with th IEC also p rticip te in this pre aratio IEC c la orates closely

with th Intern tio al Org nizatio for Sta d rdizatio (ISO) in a c rd n e with c n itio s d termin d b

a re me t b twe n th two org nizatio s

2) Th formal d cisio s or a re me ts of IEC o te h ic l maters e pres , as n arly as p s ible, a intern tio al

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p te t rig ts IEC sh l n t b h ld resp nsible for id ntifyin a y or al su h p te t rig ts

International Stan ard IEC 6 3 4-6 has b en pre ared by the IEC tec nical commit e 6 :

Electrical in talation an protection again t electric s ock

This secon edition can els an re laces the first edition publ s ed in 2 0 an con titutes a

tec nical revision

This edition in lu es the fol owin sig ificant tec nical c an es with resp ct to the previou

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g) An ex D: Example of a diagram s ita le for evaluation of voltage dro Content removed;

h) An ex E: Recommen ation for electrical eq ipment whic is b in re-u ed in an electrical

in tal ation Content removed;

i) An ex F: Content re laced with new An ex E – Model forms for re ortin ;

j) An ex G: Chan ed to An ex F – Model forms for in p ction of electrical in tal ation ;

k) An ex H: Chan ed to An ex G – Model s hed le of circ it detai s an test res lts;

l) An ex H: Listin of notes con ernin some cou tries;

m) Bibl ogra h – Updated:

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

Ful information on the votin for the a proval of this stan ard can b fou d in the re ort on

votin in icated in the a ove ta le

This publcation has b en drafed in ac ordan e with the ISO/IEC Directives, Part 2

A l st of al p rts in the IEC 6 3 4 series, publ s ed u der the general title Low v lage

electrical instalato s, can b fou d on the IEC we site

The re der's at ention is drawn to the fact that An ex H l sts al of the “in-some-cou try”

clau es on dif erin practices of a les p rmanent nature relatin to the s bject of this

stan ard

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 in icated on the IEC we site u der "htp:/we store.iec.c " in the data

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

• reconfirmed,

• with rawn,

• re laced by a revised edition, or

• amen ed

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

that it contains colours whic are consid re to be u eful for the cor e t

understa ding of its conte ts Us rs s ould therefore print this doc me t using a

colour printer

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LOW VOLTAGE ELECTRICAL INSTALLATIONS –

Part 6: Verification

This p rt of IEC 6 3 4 provides req irements for initial an p riodic verification of an

electrical in tal ation

Clau e 6.4 provides req irements for initial verification, by in p ction an testin , of an

electrical in tal ation to determine, as far as re sona ly practica le, whether the req irements

of the other p rts of IEC 6 3 4 have b en met an req irements for the re ortin of the

res lts of the initial verification The initial verification ta es place up n the completion of a

new in tal ation or completion of an ad ition or an alteration to an existin in talation

Clau e 6.5 provides req irements for p riodic verification of an electrical in tal ation to

determine, as far as re sona ly practica le, whether the in tal ation an al its con tituent

eq ipment are in a satisfactory con ition for u e an req irements for the re ortin of the

res lts of the p riodic verification

The folowin doc ments, in whole or in p rt, are normatively referen ed in this doc ment an

are in isp n a le for its a pl cation For dated referen es, only the edition cited a pl es 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 0 9-17, Exp losiv atmosp heres – Part 17: Electrical instalato s inspe cto a d

mainte a ce

IEC 6 3 4 (al p rts), Low-v la e e le ctrical instalato s

IEC 6 3 4-4-41:2 0 , Low-v lage electrical instalato s – Part 4-41: Prote cto for safety –

Protecto against electric sh ck

IEC 6 3 4-4-4 :2 10, Low-v la e e le ctrical instalato s – Part 4-4 : Protecto for safety –

Prote cto against th rm al efe cts

IEC 6 3 4-4-4 :2 10/AMD1:2 14

IEC 6 3 4-4-4 :2 0 , Low-v la e e le ctrical instalato s – Part 4-4 : Prote cto for safety –

Prote cto against v la e disturb ances a d e lectrom agnetc disturb ances

IEC 6 3 4-4-4 :2 0 /AMD1:2 15

IEC 6 3 4-5-51:2 0 , Electrical instalato s of b uildings – Part 5-51:– Selecto a d e recto

of ele ctrical e u ip me t – Commo rule s

IEC 6 3 4-5-5 :2 0 , Low-v lage electrical instalato s – Part 5-5 : Selecto a d erecto

of e lectrical e uipme t – Wirin systems

IEC 6 3 4-5-5 :2 01, Ele ctrical instalato s of b u ildings – Part 5-53: Selecto a d e re cto

of ele ctrical e u ipme nt – Isolato , swichin a d co trol

IEC 6 3 4-5-5 :2 01/AMD1:2 0

IEC 6 3 4-5-5 :2 01/AMD2:2015

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IEC 6 3 4-5-5 , Low-v lage e le ctrical instalato s – Part 5-5 : Selecto a d erecto of

ele ctrical e u ipme t – Earthin ara g me nts a d p rotectv co ductors

IEC 615 7 (al p rts), Ele ctrical safe ty in low v lage distrib utio systems up to 1 0 00 V a.c

a d 1 5 0 V d.c – Equ ip me t for te stng, me surin ormo iorin of p rote ctv me asures

IEC 615 7-6, Ele ctrical safety in low v lage distrib u tio syste ms up to 1 00 0 V a.c a d 1 50 0

V d.c – Equ ip me t for testng, me surin or mo iorin of p rote ctv me asure s – Part 6:

Efectve nes of residu al curre t de ices (RCD) in TT, TN a d IT systems

6.3 Terms a d definitions

For the purp ses of this doc ment, the fol owin terms an definition a ply

6.3.1

v rific tion

al me s res by me n of whic compl an e of the electrical in tal ation with the relevant

req irements of IEC 6 3 4 is c eck d

Note 1 to e try: Verific tio c mprises insp ctio , testin a d re ortin

6.3.2

inspe tion

examination of an electrical in tal ation u in al a pro riate sen es in order to as ertain

cor ect selection an pro er erection of electrical eq ipment

6.3.3

te ting

implementation of me s res to as es an electrical in talation by me n throu h whic its

ef ectivenes is proved

Note 1 to e try: Testin in lu es asc rtainin v lu s b me ns of a pro riate me surin instrume ts, said v lu s

combination of al tec nical an administrative action , in lu in s p rvisory action ,

inten ed to retain an item in, or restore it to, a state in whic it can p rform a req ired

fu ction

6.4 Initial v rific tion

6.4.1.1 Every in tal ation s al b verified d rin erection, as far as re sona ly practica le,

an on completion, b fore b in put into service

6.4.1.2 The information req ired by IEC 6 3 4-5-51:2 0 , 514.5 an other information

neces ary for initial verification s al b made avai a le to the p rson car yin out the initial

verification

6.4.1.3 The initial verification s al in lu e comp rison of the res lts with relevant criteria

to confirm that the req irements of the IEC 6 3 4 series have b en met

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6.4.1.4 Precaution s al b ta en to en ure that the verification s al not cau e dan er to

p rson or l vestock an s al not cau e damage to pro erty an eq ipment even if the circ it

is defective

6.4.1.5 It s al b verified that an exten ion, ad ition or alteration to an existin in tal ation

compl es with the IEC 6 3 4 series an do s not imp ir the safety of that in talation, an

that the safety of the new in tal ation is not imp ired by the existin in talation

6.4.1.6 The verification s al b made by a ski ed p rson, comp tent in verification

NOT Re uireme ts c n ernin q alfic tio s are amater for n tio alc nsid ratio

– in compl an e with the safety req irements of the relevant eq ipment stan ard ;

NOT This c n b asc rtain d b e amin tio of th ma ufa turer’sinformatio , markin or c rtific tio

– cor ectly selected an erected ac ordin to the IEC 6 3 4 series an ta in into ac ou t

the man facturer’s in tru tion ;

– not visibly damaged or defective so as to imp ir safety

6.4.2.3 In p ction s al in lu e at le st the c eckin of the folowin , where relevant:

a) method of protection again t electric s ock (se IEC 6 3 4-4-41);

b) presen e of fire b r iers an other precaution again t pro agation of fire an protection

again t thermal efects (se IEC 6 3 4-4-4 an IEC 6 3 4-5-5 :2 0 , Clau e 5 7);

c) selection of con u tors for c r ent car yin ca acity (se IEC 6 3 4-4-4 an IEC 6 3

h) identification of neutral an protective con u tors (se IEC 6 3 4-5-51:2 0 , 514.3);

i) presen e of diagrams, warnin notices or simi ar information (se IEC 6 3 4-5-51:2 0 ,

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o) exp sed-con u tive-p rts are con ected to the e rthin ar an ement (se

The test method des rib d in 6.4.3 are given as referen e method ; other method are not

preclu ed, provided they give no les val d res lts

Me s rin in truments an monitorin eq ipment an method s al b c osen in ac ordan e

with the relevant p rts of the IEC 615 7 series If other meas rin eq ipment is u ed, it s al

provide no les a degre of p rforman e an safety

The fol owin tests s al b car ied out where relevant an s ould prefera ly b made in the

fol owin seq en e:

a) contin ity of con u tors (se 6.4.3.2);

b) in ulation resistan e (se 6.4.3.3);

c) in ulation resistan e testin to confirm the efectivenes of protection by SELV, PELV or

electrical se aration (se 6.4.3.4);

d) in ulation resistan e testin to confirm the efectivenes of flo r an wal

resistan e/imp dan e (se 6.4.3.5);

e) p larity test (se 6.4.3.6);

f testin to confirm ef ectivenes of automatic dis on ection of s p ly (se 6.4.3.7);

g) testin to confirm the efectivenes of ad itional protection (se 6.4.3.8);

h) test of phase seq en e (se 6.4.3.9);

i) fu ctional tests (se 6.4.3.10);

j) voltage dro (se 6.4.3.1 )

In the event of an test in icatin fai ure to comply, that test an an precedin test, the

res lts of whic may have b en influen ed by the fault in icated, s al b re e ted afer the

fault has b en rectified

When testin in a p tential y explosive atmosphere a pro riate safety precaution in

ac ordan e with IEC 6 0 9-17 are neces ary

6.4.3.2 Continuity of con uctors

The contin ity of con u tors an con ection to exp sed-con u tive-p rts, if an , s al b

verified by a me s rement of resistan e on:

a) protective con u tors, in lu in protective b n in con u tors,

b) exp sed-con u tive-p rts, an

c) in the case of rin final circ its, l ve con u tors

NOT Se alsoAn e A

6.4.3.3 Ins lation re ista c of the ele tric l instal ation

The in ulation resistan e s al b me s red b twe n:

Trang 12

b) l ve con u tors an the protective con u tor con ected to the e rthin ar an ement.

Where a pro riate d rin this me s rement, lve con u tors may b con ected together In

practice, it may b neces ary to car y out this me s rement d rin erection of the in tal ation

b fore the con ection of the eq ipment

Where the circ it in lu es eq ipment that is l k ly to influen e the res lts or b damaged,

only a me s rement b twe n the l ve con u tors con ected together an e rth s al b

made

The in ulation resistan e me s red with the test voltages in icated in Ta le 6.1 s al b

con idered satisfactory if the main switc bo rd an e c distribution circ it tested se arately,

with al its final circ its con ected but with c r ent u in eq ipment dis on ected, has an

in ulation resistan e not les than the a pro riate value given in Ta le 6.1

Table 6.1 – Minimum v lue of ins lation re ista c

Nominal circ it volta e Te t volta e d.c Minimum ins latio re istanc

Ta le 6.1 s al b a pl ed for a verification of the in ulation resistan e b twe n non-e rthed

protective con u tors an e rth

FELV circ its s al b tested at the same test voltage as that a pl ed to the primary side of

the source

Where s rge protective devices (SPDs) or other eq ipment are l k ly to influen e the

verification test, or b damaged, s c eq ipment s al b dis on ected b fore car yin out

the in ulation resistan e test

Where it is not re sona ly practica le to dis on ect s c eq ipment (e.g in case of fixed

sock t outlets in orp ratin an SPD) the test voltage for a p rtic lar circ it may b red ced to

2 0 V d.c but the in ulation resistan e s al have a value of at le st 1 MΩ

To faci tate me s rement, the neutral con u tor s al b dis on ected from the main e rthin

terminal (MET)

In TN-C s stems, a me s rement s ould b made b twe n the l ve con u tors an the PEN

con u tor

In ulation resistan e values are u ual y mu h hig er than those of Ta le 6.1 When me s red

values s ow evident diferen es b twe n circ its, further in estigation to identify the re son

is req ired

6.4.3.4 Ins lation re ista c te ting to confirm ef e tiv ne s of SELV, PELV or

ele tric l s paration

The se aration of circ its s al b in ac ordan e with 6.4.3.4.1 in the case of protection by

SELV, 6.4.3.4.2 in the case of protection by PELV an 6.4.3.4.3 in the case of protection by

electrical se aration

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The resistan e value o tained in 6.4.3.4.1, 6.4.3.4.2 an 6.4.3.4.3 s al b at le st that of the

circ it with the hig est voltage present in ac ordan e with Ta le 6.1

The se aration of l ve p rts from those of other circ its an from e rth, ac ordin to

IEC 6 3 4-4-41:2 0 , Clau e 414, s al b confirmed by a me s rement of the in ulation

resistan e

6.4.3.4.2 Prote tion by PELV

The se aration of the l ve p rts from other circ its, ac ordin to IEC 6 3 4-4-41:2 0

Clau e 414, s al b confirmed by a me s rement of the in ulation resistan e

6.4.3.4.3 Prote tion by ele tric l s paration

The se aration of the l ve p rts from those of other circ its an from e rth, ac ordin to

IEC 6 3 4-4-41:2 0 , Clau e 413, s al b confirmed by a me s rement of the in ulation

resistan e

For electrical se aration with more than one item of c r ent u in eq ipment, it s al b

verified either by me s rement or by calc lation that in the case of two coin idental faults

with neglgible imp dan e b twe n dif erent l ne con u tors an either the protective b n in

con u tor or exp sed-con u tive-p rts con ected to it, at le st one of the faulty circ its s al

b dis on ected The dis on ection time s al b in ac ordan e with that for the protective

me s re automatic dis on ection of s p ly in a TN s stem

6.4.3.5 In ulation re ista c /impe a c of flo rs a d wal s

When it is neces ary to comply with the req irements of IEC 6 3 4-4-41:2 0 , Clau e C.1, at

le st thre me s rements s al b made in the same location, one of these me s rements

b in a proximately 1 m from an ac es ible extrane u -con u tive-p rt in the location The

other two me s rements s al b made at gre ter distan es

The me s rement of resistan e/imp dan e of in ulatin flo rs an wal s is car ied out with

the s stem voltage to e rth at nominal freq en y

The a ove series of me s rements s al b re e ted for e c relevant s rface of the

location

NOT Furth r informatio o th me sureme t of th insulatio resista c /imp d n e of flo rs a d wals is giv n

in An e B

6.4.3.6 Polarity

Where relevant, the p larity of the s p ly at the origin of the in tal ation s al b verified

b fore the in tal ation is energized

Where sin le p le switc in devices are not p rmited in the neutral con u tor, a test s al b

made to verify that al s c devices are con ected in the l ne con u tor(s) only

Durin the p larity test, it s ould b verified that:

a) every fu e an sin le-p le control an protective device is con ected in the l ne cond ctor

only, an

b) ex e t for E14 an E2 lampholders ac ording to IEC 6 2 8, in circ its havin an e rthed

neutral con u tor centre contact b yonet an Edison s rew lampholders, the outer or

s rewed contacts are con ected to the neutral con u tor, an

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6.4.3.7 Prote tion by a tomatic dis on e tion of s pply

NOT Wh re R Ds are emplo e also for prote tio a ainst fire, th v rific tio of th c n itio s for prote tio

b a tomatic disc n e tio of th su ply c n b c nsid re as c v rin th rele a t re uireme ts of IEC 6 3 4-

4-4

The verification of the efectivenes of the me s res for fault protection by automatic

dis on ection of s p ly is ef ected as fol ows:

a) For a TN s stem

Compl an e with the rules of IEC 6 3 4-4-41: 2 0 , 41 4.4 an 41 3.2 s al b verified by:

1) Me s rement of the e rth fault lo p imp dan e where p s ible (se 6.4.3.7.3)

Alternatively, where the me s rement of e rth fault lo p imp dan e is not p s ible the

verification of the electrical contin ity of the protective con u tors (se 6.4.3.2) is

s f icient provided that calc lation of e rth fault lo p imp dan e or protective

con u tor resistan e are avai a le

2) Verification of the c aracteristic an /or the ef ectivenes of the as ociated protective

device This verification s al b made:

– for overc r ent protective devices, by vis al in p ction or other a pro riate

method (i.e s ort time or in tantane u trip in setin for circ it bre k rs,

c r ent ratin an typ for fu es);

– for RCDs, by vis al in p ction an testin

The ef ectivenes of automatic dis on ection by RCDs s al be verified u in

s ita le test eq ipment ac ordin to IEC 615 7-6 confirmin that the relevant

req irements in IEC 6 3 4-4-41 are met ta in into ac ou t the o eratin

c aracteristic of the device The efectivenes of the protective me s re is verified

if dis on ection oc urs with a fault c r ent lower than or eq al to the rated resid al

o eratin c r ent I

∆n

It is recommen ed that the dis on ection times req ired by IEC 6 3 4-4-41 b

verified However, the req irements for dis on ectin times s al b verified in case

of ad ition an alteration to an existin in tal ation where existin RCDs are also

u ed as dis on ectin devices for s c ad ition an alteration

Where the efectivenes of the protective me s re has b en confirmed at a p int located

down tre m of an RCD, the protection of the in tal ation down tre m from this p int may b

proved by confirmation of the contin ity of the protective con u tors

2) Verification of the c aracteristic an /or the ef ectivenes of the as ociated protective

device This verification s al b made:

– for overc r ent protective devices, by vis al in p ction or other a pro riate

method (i.e s ort time or in tantane u trip in setin for circ it bre k rs,

c r ent ratin an typ for fu es);

– for RCDs, by vis al in p ction an testin

The efectivenes of automatic dis on ection by RCDs s al b verified u in

s ita le test eq ipment ac ordin to IEC 615 7-6 confirmin that the relevant

req irements in IEC 6 3 4-4-41 are met ta in into ac ou t the o eratin

Trang 15

if dis on ection oc urs with a fault c r ent lower or eq al to the rated resid al

o eratin c r ent I

∆n

It is recommen ed that the dis on ection times req ired by IEC 6 3 4-4-41 b

verified However, the req irements for dis on ectin times s al b verified in

case of ad ition an alteration to an existin in tal ation where existin RCDs are

also u ed as dis on ectin devices for s c ad ition an alteration

Where the efectivenes of the protective me s re has b en confirmed at a p int located

down tre m of an RCD, the protection of the in tal ation down tre m from this p int may b

proved by confirmation of the contin ity of the protective con u tors

c) For an IT s stem

Compl an e with the rules of IEC 6 3 4-4-41: 2 0 , 41 6.2 s al b verified by calc lation or

me s rement of the c r ent I in case of a first fault of a lve con u tor

The me s rement is made only if the calc lation is not p s ible, b cau e al the p rameters

are not known Precaution are to b ta en whi e ma in the me s rement in order to avoid

the dan er d e to a double fault

In the case of a double e rth fault, the fault lo p imp dan e s al b verified by calc lation

or by me s rements Where the con ition is simiar to that of a T -s stem (se

IEC 6 3 4-4-41:2 0 , 41 6.4 item b), verification s al b made as for a TT s stem (se

6.4.3.7.1, item b) Where con ition are simiar to that of a TN-s stem (se IEC 6 3 4-

4-41:2 0 , 41 6.2), verification by me s rement s al b made as folows

– For IT in tal ation s p l ed from a local tran former, the e rth-lo p imp dan e is

me s red by in ertin a con ection with negl gible imp dan e b twe n a l ve con u tor

an e rth at the origin of the in tal ation The e rth-lo p imp dan e me s rement is made

b twe n a secon l ve con u tor an protective-e rth at the en of the circ it Verification

is ac ieved if the me s red value is ≤ 5 % of the maximum al owed lo p-imp dan e

– For IT s stems con ected to a publ c grid, the e rth fault lo p imp dan e is determined by

verification of the contin ity of the protective con u tor an me s rin the lo

p-imp dan e b twe n two l ve con u tors at the en of the circ it Verification is ac ieved if

the me s red value is ≤ 5 % of the maximum p rmit ed lo p-imp dan e If verification is

not ac ieved, more detai ed me s rements are neces ary

6.4.3.7.2 Me s reme t of the re ista c of the e rth ele trode

Me s rement of the resistan e of an e rth electrode, where pres rib d (se IEC 6 3 4-4-41:

2 0 , 41 5.3, for a T s stem, 41 4.1, for a TN s stem, an 41 6.2, for an IT s stem),

s al b made by an a pro riate method When me s rin the resistan e is not p s ible, the

resistan e may also b calc lated u in a pl ca le values

NOT 1 An e C, Meth d C1 giv s, as a e ample, ad scriptio of ameth d of me sureme t usin two a xi ary

e rth ele tro es a d th c n itio s to b fulfi e

NOT 2 Wh re th lo atio of th instalatio (e.g in towns) is su h th t it is n t p s ible in pra tic to pro id

th two a xi ary e rth ele tro es, me sureme t of th e rth fa lt lo p imp d n e a c rdin to 6.4.3.7.3, or

An e C, Meth ds C2 a d C3 wi giv a a c pta le a pro imate v lu

6.4.3.7.3 Me s reme t of the e rth fa lt loop impe a c

An electrical contin ity test s al b car ied out ac ordin to 6.4.3.2 b fore car yin out the

e rth fault lo p imp dan e me s rement

The me s red e rth fault lo p imp dan e s al comply with IEC 6 3 4-4-41: 2 0 , 41 4.4

for TN s stems an with IEC 6 3 4-4-41: 2 0 , 41 6.4 for IT s stems

Trang 16

Where the req irements of 6.4.3.7.2 are not satisfied or in case of doubt an where

s p lementary b n in ac ordin to IEC 6 3 4-4-41:2 0 , 415.2 is a pl ed, the ef ectivenes

of that b n in s al b c eck d ac ordin to IEC 6 3 4-4-41:2 0 , 415.2.2

6.4.3.8 Addition l prote tion

The verification of the ef ectivenes of the me s res a pl ed for ad itional protection is

fulfi ed by vis al in p ction an test

Where an RCD is req ired for ad itional protection, the ef ectivenes of automatic

dis on ection of s p ly by RCD s al b verified u in s ita le test eq ipment ac ordin to

IEC 615 7-6

Where ad itional protection is provided by s p lementary protective b n in , the

ef ectivenes of that b n in s al b c eck d ac ordin to IEC 6 3 4-4-41:2 0 , 415.2.2

6.4.3.9 Pha e s qu nc

In the case of multiphase circ its, it s al b verified that the phase seq en e is maintained

6.4.3.10 Fu ctional te ting

Eq ipment s al b s bjected to fu ctional testin to verify that it is pro erly mou ted,

adju ted an in tal ed in ac ordan e with the relevant req irements of the IEC 6 3 4 series

Examples of s c eq ipment are:

– switc ge r an controlge r as embl es, drives, controls an interlocks,

– s stems for emergen y switc in of an emergen y sto pin ,

– in ulation monitorin

NOT 1 This lst is n t e h ustiv

Protective devices s al b s bmited to a test of their fu ction, as neces ary, to c eck that

they are pro erly in tal ed an adju ted Where fault protection an /or ad itional protection is

to b provided by an RCD, the efectivenes of an test faci ty in orp rated in the device

s al b verified

NOT 2 This fu ctio al test d es n t re la e th fu ctio al test in ic te b th rele a t sta d rds

6.4.3.1 Verific tion of volta e drop

Where req ired to verify complan e with IEC 6 3 4-5-5 : 2 0 , Clau e 5 5, the voltage dro

s al b evaluated by me s rement or by calc lation (se IEC 6 3 4-5-5 : 2 0 , An ex G)

Me s rement may b :

– comp rison of the dif eren e b twe n the voltage with an without the desig lo d

con ected, or

– comp rison of the diferen e b twe n the voltage with an without an known lo d

con ected an recalc lated to the desig lo d, or

– circ it imp dan e values

6.4.4 Reporting for initial v rific tion

6.4.4.1 Up n completion of the verification of a new in tal ation or ad ition or alteration

to an existin in tal ation, an electrical in tal ation verification re ort s al b provided Su h

doc mentation s al in lu e detai s of the extent of the in tal ation covered by the re ort,

together with a record of the in p ction an the res lts of testin

Trang 17

An defects or omis ion reve led d rin verification of the in tal ation s al b cor ected

b fore the p rson car yin out the verification declares that the in tal ation comples with the

IEC 6 3 4 series

6.4.4.2 In the case of initial verification of alteration or ad ition of existin in tal ation ,

the re ort may contain recommen ation for re airs an improvements, as may b

a pro riate

6.4.4.3 The initial re ort s al in lu e record of:

– in p ction ;

– circ its tested an test res lts

The record of circ it detais an test res lts s al identify every circ it, in lu in its related

protective device(s) an s al record the res lts of the a pro riate tests an me s rements

6.4.4.4 The p rson or p rson resp n ible for the desig , con tru tion an verification of

the in tal ation s al give the re ort, whic ta es ac ou t of their resp ctive resp n ibi ties, to

the p rson orderin the work, together with the record mentioned in 6.4.4.3

The initial re ort of the electrical in talation s ould ma e a recommen ation for a p riod

b twe n initial verification an the first p riodic verification

6.4.4.5 Re orts s al b compi ed an sig ed or otherwise authenticated by a ski ed

p rson or p rson comp tent in verification

NOT An e es E, F a d G c ntain mo el forms of re orts a d sc e ules th t c n b use for th d scriptio of

initial a d p rio ic v rific tio of instalatio s whic are p rtic larly suita le for d mestic instalatio s Natio al

c mmite s ma a a t th c nte t of th se a n x s to suit n tio al c n itio s a d pra tic s

Where no previou re ort is avai a le, a prel minary s rvey is neces ary

6.5.1.2 Periodic verification s al b car ied out without dismantln , or with p rtial

dismantl n , as req ired, s p lemented by a pro riate tests an me s rements from

Clau e 6.4, to provide for:

a) the safety of p rson an lvestock again t the efects of electric s ock an burn ,

b) protection again t damage to pro erty by fire an he t arisin from an electrical

in tal ation defect,

c) confirmation of cor ect ratin an setin of protective devices req ired by

IEC 6 3 4-4-41,

d) confirmation of cor ect ratin an setin of monitorin devices,

e) confirmation that the in tal ation is not damaged or deteriorated so as to imp ir safety,

f the identification of in tal ation defects an non-compl an es with the req irements of the

relevant p rts of the IEC 6 3 4 series, that may give rise to dan er,

g) confirmation of cor ect ratin an set in of protective devices, an

h) confirmation of cor ect ratin an setin of monitorin devices

Trang 18

Where a circ it is p rmanently monitored by an RCM in ac ordan e with IEC 6 0 0 or an IMD

in ac ordan e with IEC 615 7-8 it is not neces ary to me s re the in ulation resistan e if the

fu ctionin of the IMD or RCM is cor ect

The fu ctionin of the RCM or IMD s al b verified

NOT Existin instalatio s ma h v b e d sig e a d instale to c nform to pre io s e itio s of IEC 6 3 4,

a plc ble atth time of th ir d sig a d ere tio This d es n t n c s ariy me n th t th y are u safe

6 5.1.3 Precaution s al b ta en to en ure that the p riodic verification s al not cau e

dan er to p rson or l vestock an s al not cau e damage to pro erty an eq ipment even if

the circ it is defective

Me s rin in truments an monitorin eq ipment an method s al b c osen in ac ordan e

with the relevant p rts of IEC 615 7 If other me s rin eq ipment is u ed, it s al provide no

les a degre of p rforman e an safety

6.5.1.4 Detai s of an damage, deterioration, defects or dan erou con ition s al b

recorded in the re ort

6.5.1.5 The verification s al b made by a ski ed p rson, comp tent in verification

NOT Re uireme ts c n ernin q alfic tio s are amater for n tio alc nsid ratio

6.5.2 Fre u nc of periodic v rific tion

6.5.2.1 The freq en y of p riodic verification of an in tal ation s al b determined havin

regard to the typ of in tal ation an eq ipment, its u e an o eration, the freq en y an

q al ty of maintenan e an the external influen es to whic it wi b s bjected

The maximum interval b twe n p riodic verification may b laid down by legal or national

reg lation

The interval may b , for in tan e several ye rs (e.g four ye rs), with the ex e tion of the

fol owin cases where a hig er risk may exist an s orter p riod may b req ired:

– work laces or location where risks of electric s ock, fire or explosion exist d e to

degradation;

– work laces or location where b th hig an low voltage in tal ation exist;

– commu al faci ties;

– con tru tion sites;

– safety in tal ation (e.g emergen y luminaires)

For dwel n s, lon er p riod (e.g ten ye rs) may b a pro riate When oc up n y of a

dwel n has c an ed, a verification of the electrical in tal ation is stron ly recommen ed

The res lts an recommen ation of previou re orts s ould also b ta en into ac ou t

6.5.2.2 In the case of an in tal ation u der an efective management s stem for

preventative maintenan e in normal u e, p riodic verification may b re laced by an

adeq ate regime of contin ou monitorin an maintenan e of the in talation an al its

con tituent eq ipment by ski ed p rson Ap ro riate record s al b k pt

6.5.3 Reporting for periodic v rific tion

6.5.3.1 Up n completion of the p riodic verification of an existin in tal ation, an electrical

in tal ation con ition re ort s al b provided

Trang 19

6.5.3.2 The re ort s al in lu e the fol owin :

– detai s of those p rts of the in tal ation that have b en in p cted;

– an l mitation of the in p ction an testin ;

– an damage, deterioration, defects or dan erou con ition ;

– an non-complan e with the req irements of the IEC 6 3 4 series whic may give rise to

dan er;

– s hed les of in p ction;

– s hed les of res lts of the a pro riate tests detai ed in 6.4.3

6.5.3.3 The re ort may contain recommen ation for re airs an improvements, s c as

upgradin the in tal ation to comply with the c r ent stan ard, as may b a pro riate

6.5.3.4 The re ort s al contain a recommen ation for the interval u ti the next p riodic

in p ction

6.5.3.5 The re ort s al b compi ed an sig ed or otherwise authenticated by a ski ed

p rson or p rson , comp tent in verification

6.5.3.6 The re ort s al b given by the p rson resp n ible for car yin out the verification,

or a p rson authorized to act on their b half, to the p rson orderin the verification

NOT 1 An e es E, F a dG c ntain mo el forms of re orts a d sc e ules th t c n b use for th d scriptio of

initial a dp rio ic v rific tio of instalatio s whic are p rtic larly suita le for d mestic instalatio s

NOT 2 Natio al c mmite s ma a a t th c nte t of th se a n x s to suit n tio alc n itio s a d pra tic s

Trang 20

Annex A

(informativ )

Estimation of the resistance value l kely to be obtained

during continuity testing

Table A.1 – Spe ific con uctor re ista c R for copper wiring at 3 °C depe de t on the

nominal cros -s ctional are S for rou h c lc lation of condu tor re ista c s

Nominal cros -s ctio al are S Spe ific co du tor re istanc R at 3 °C

mm2

Th sp cific c n u tor resista c v lu s are relate to a c n u tor temp rature of 3 °C For oth r

temp rature Θ th c n u tor re ista c s R c nb c lc late b th use of th folowin formula:

C31

Trang 21

Annex B

(informativ )

Methods for measuring the insulation resistance/impedance of floors

and wal s to earth or to the protective conductor

Me s rement of imp dan e or resistan e of in ulatin flo rs an wal s s ould b car ied out

with the s stem voltage to e rth an nominal freq en y, or with a lower voltage of the same

nominal freq en y combined with a me s rement of in ulation resistan e

The in ulation resistan e test s ould b made u in me s rin eq ipment in ac ordan e with

IEC 615 7-2

The test may b car ied out, for example, in ac ordan e with the fol owin method of

me s rement:

1) a.c s stems

– by me s rement with lower a.c voltages (minimum 2 V) an ad itional y by an

in ulation resistan e test u in a minimum test voltage of 5 0 V (d.c.) for nominal

s stem voltages not ex e din 5 0 V an a minimum test voltage of 1 0 0 V (d.c.) for

nominal s stem voltages a ove 5 0 V

The fol owin voltage sources may b u ed o tional y:

a) the e rthed s stem voltage (voltage to e rth) that exists at the me s rin p int;

b) the secon ary voltage of a double-wou d tran former;

c) an in e en ent voltage source at the nominal freq en y of the s stem

In cases as specified u der b) an c), the me s rin voltage s al b e rthed for

the me s rement

For safety re son , when u in test voltages a ove 5 V, the maximum output

c r ent s al b l mited to 3,5 mA

2) d.c s stems

– in ulation resistan e test u in a maximum test voltage of 5 0 V (d.c.) for nominal

s stem voltages not ex e din 5 0 V;

– in ulation resistan e test u in a minimum test voltage of 1 0 0 V (d.c) for nominal

s stem voltages a ove 5 0 V

B.2 Test method for measuring the impedance of floors and wal s with a.c

voltage

Cur ent I is fed throu h an ammeter to the test electrode from the output of the voltage source

or from the phase con u tor L The voltage U

x

at the electrode is me s red by me n of a

voltmeter with internal resistan e of at le st 1 MΩ toward PE

The imp dan e of the flo r in ulation wi then b Z

x

= U

x/I

The me s rement for as ertainin the imp dan e s al b car ied out at as man p ints as

de med neces ary, selected at ran om, with a minimum of thre

The test electrode may b either of the fol owin typ s In case of dispute, the u e of test

electrode 1 is the referen e method

Trang 22

B.3 Test electrode 1

Test electrode 1 is s own in Fig re B.1 The electrode comprises a metal c trip d of whic

the p rts restin on the flo r form the p ints of an eq i ateral trian le Eac s p ortin p int

is provided with a flexible b se to en ure that, when lo ded, close contact is made with the

s rface b in tested over an are of a proximately 9 0 mm

2

The electrode s ould present a

resistan e of 5 0 0 Ω

A s uare of damp ned, water-a sorb nt p p r or cloth, with sides that me s re

a proximately 2 0 mm from whic s rplu water has b en removed is placed b twe n the

test electrode an the s rface b in tested

Whi e me s rements are b in made, a force of a proximately 7 0 N for flo rs or 2 0 N for

wal s is a pl ed to the trip d

D ime sio s in mi imeters

Figure B.1 – Te t ele trode 1

B.4 Test electrode 2

Test electrode 2 is s own in Fig re B.2 The electrode comprises a s uare metal c plate with

sides that me s re 2 0 mm, an a s uare of damp ned, water-a sorb nt p p r, or cloth,

from whic s rplu water has b en removed with sides that me s re a proximately 2 0 mm

The p p r is placed b twe n the metal plate an the s rface b in tested

Durin me s rement a force of a proximately 7 0 N for flo rs or 2 0 N for wal s is a pl ed on

Ata h d b scr ew ,

w ash r a d n t

Se tio of a c nta t

stu in c n u tiv e r ub er Profie

ø 9

IE

Trang 23

I

(*) Prote tio a ainst u inte tio al c nta t b a resista c lmitin th c rr ent to 3,5 mA

IE

Trang 24

Annex C

(informativ )

Measurement of earth electrode resistance – Methods C1, C2 and C3

C.1 Method C1 – Me sureme t of earth ele trode resistance using a earth

electrode test instrument

The fol owin proced re may b ado ted when me s rement of the e rth resistan e is

neces ary

An alternatin c r ent of a ste d value is p s ed b twe n the dis on ected e rth electrode,

E, an a temp rary au i ary e rth electrode, H, placed at a distan e from E s c that the

resistan e are s of the two electrodes do not overla

A secon temp rary pro e electrode, S, whic may b a metal spik driven into the grou d, is

then in erted half way b twe n E an H, an the voltage dro b twe n E an S is me s red

In most cases S s ould b placed at a distan e of a proximately 2 m from E an H The

electrodes may b ar an ed in a l ne r formation (se Fig re C.1 a) or trian ular formation

(se Fig re C.1 b) to s it avai a le sp ce

The resistan e of the e rth electrode is then the voltage b twe n E an S, divided by the

c r ent flowin b twe n E an H, provided there is no overla of the resistan e are s

To c eck that the resistan e of the e rth electrode is a true value, two further re din s are

ta en with the secon electrode, S, moved a proximately 10 % of the lne r distan e b twe n

E an H from the original p sition If the thre res lts are s bstantial y in agre ment, the

me n of the thre re din s is ta en as the resistan e of the e rth electrode E If there is no

s c agre ment, the tests are re e ted with the distan e b twe n E an H in re sed

a) Ele t o e ar ang d in l ne r formatio

Trang 25

b) Ele t o e ar ang d in t iang lar formatio

Temp rary a xi ary pro e e rth ele tro e resista c (c re t

Fig re C.1 – Me s reme t of th e rth ele trode re ista c

C.2 Method C2 – Me sureme t of earth ele trode resistance using a fault loop

impe ance test instrume t

Me s rement of the e rth fault lo p imp dan e at the origin of the electrical in tal ation may

b car ied out with a test in trument ac ordin to IEC 615 7-3

The test s ould b p rformed on the l ve side of the main switc with the s p ly to the

in tal ation switc ed OFF an with the e rthin con u tor temp rari y dis on ected from the

main e rthin terminal (MET)

The test in trument s ould b set to a ran e a pro riate for the value of e rth fault lo p

imp dan e lk ly to b exp cted for a given s stem e rthin ar an ement ( ypical y in the

region of 0 Ω to 2 Ω)

The test in trument s ould b con ected as s own in Fig re C.2 Where an doubt exists the

in trument s ould b con ected as des rib d in the man facturer’s in tru tion

Only a smal pro ortion of the me s red e rth fault lo p imp dan e is derived from those

p rts of the lo p other than the electrode an so the res lt o tained from this test can b

ta en as a re sona le a proximation of the e rth electrode resistan e

The test res lt s ould not ex e d the prod ct of 5 V / I

∆n(se IEC 6 3 4-4-41:2 0 ,

Trang 26

It is imp rtant that the e rthin con u tor is recon ected to the MET of the in talation b fore

the s p ly is rein tated

Ke

1 Earthin c n u tor temp rariy disc n e te from th main e rthin termin l (ME )

Figure C.2 – Me s reme t of the e rth ele trode re ista c u ing a e rth

With referen e to Fig re C.3 the first clamp in u es a me s rin voltage U into the lo p, the

secon clamp me s res the c r ent I within the lo p The lo p resistan e is calc lated by

dividin the voltage U by the c r ent I

As the res ltin value of p ral el resistan es R

1

n

is normal y negl gible, the u known

resistan e is eq al to, or sl g tly lower than, the me s red lo p resistan e

The voltage an c r ent cois may b in in ivid al clamps se arately con ected to an

in trument or in a sin le combined clamp

This method is directly a pl ca le to TN s stems an within mes ed e rthin of TT s stems

In TT s stems, where only the u known e rth con ection is avai a le, the lo p can b closed

by a temp rary con ection b twe n e rth electrode an neutral con u tor (q asi TN s stem)

Trang 27

It s ould b noted that the values of resistan e o tained u in Method C3 wi typical y b

hig er than those o tained u in Method C1 b cau e of the e rth lo p me s rement

Figure C.3 – Me s reme t of e rth ele trode re ista c using c r e t clamps

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D.6.4.2.2 This in p ction is also inten ed to c eck that the in tal ation of the eq ipment

has ta en ac ou t of the man facturer’s in tru tion in order that its p rforman e is not

The in tal ation of se ls is verified to confirm compl an e with the erection in tru tion

as ociated with the IEC typ test for the relevant prod ct (u der con ideration by ISO)

No other test is req ired af er this verification

– protection again t thermal ef ects (IEC 6 3 4-4-4 )

The rules of IEC 6 3 4-4-4 con ernin protection again t thermal ef ects a ply for

normal service, i.e in the a sen e of a fault

The overc r ent protection is the o ject of IEC 6 3 4-4-4 an IEC 6 3 4-5-5 :2 01,

Clau e 5 3

The o eration of a protective device res ltin from a fault, in lu in s ort circ its, or

from overlo d , is con idered as normal service

– protection again t fire (IEC 6 3 4-4-4 :2 10, Clau e 4 2)

The req irements of Clau e 4 2 for location with fire hazard as ume that protection

again t overc r ent is in compl an e with the rules of IEC 6 3 4-4-4

c) an d) selection of con u tors for c r ent car yin ca acity an c oice, setin , selectivity

an co rdination of protective an monitorin devices

The selection of con u tors in lu in their materials, in tal ation an cros -sectional are ,

their erection an the set in of protective devices is verified ac ordin to the calc lation of

the desig er of the in tal ation in compl an e with the rules of the IEC 6 3 4 series, an in

IEC 6 3 4-5-5

i) presen e of diagrams, warnin notices or simi ar information

A diagram, as sp cified in IEC 6 3 4-5-51:2 0 , 514.5 is p rtic larly neces ary when the

in tal ation comprises several distribution b ard

k) adeq ac of termination an con ection of ca les an con u tors

The purp se of this verification is to c eck whether the clampin me n are adeq ate for the

con u tors to b con ected an whether the con ection is pro erly made

Trang 29

In case of doubt, it is recommen ed to me s re the resistan e of the con ection This

resistan e s ould not ex e d the resistan e of a con u tor havin a len th of 1 m an a

cros -sectional are eq al to the smal est cros -sectional are of the con u tors con ected

m) ac es ibi ty of eq ipment for con enien e of o eration, identification an maintenan e

It s al b verified that the o eratin devices are so ar an ed that they are e si y ac es ible

to the o erator

For devices for emergen y switc in , se IEC 6 3 4-5-5 :2 01, 5 6.4.2

For devices for switc in for mec anical maintenan e, se IEC 6 3 4-5-5 :2 01, 5 6.3.2

D.6.4.3 Te tin

D.6.4.3.2 Continuity of conductors

This testin is req ired for the verification of the protection con ition by me n of automatic

dis on ection of s p ly (se 6.4.3.7) an is con idered as satisfactory if the device u ed for

the test gives an a pro riate in ication

D.6.4.3.3 Ins lation re ista ce of the ele tric l instal ation

The me s rements s al b car ied out with the in tal ation isolated from the s p ly

General y, the in ulation me s rement is car ied out at the origin of the in tal ation

If the value me s red is les than that sp cified in Ta le 6.1, the in tal ation may b divided

into several circ it groups an the in ulation resistan e of e c group s ould b me s red

When some circ its or p rts of circ its are dis on ected by u dervoltage devices ( or

in tan e contactors) inter uptin al l ve con u tors, the in ulation resistan e of these circ its

or p rts of circ its is me s red se arately

D.6.4.3.4.3 Prote tion by ele tric l s paration

Where eq ipment in lu es b th a se arated circ it an other circ its, the req ired in ulation

is o tained by the con tru tion of the eq ipment in ac ordan e with the safety req irements

of the relevant stan ard

D.6.4.3.7 Prote tion by a tomatic dis on e tion of s pply

D.6.4.3.7.1 Ge eral

Ac ordin to IEC 6 3 4-4-41, where automatic dis on ection of s p ly is provided by an

RCD, the dis on ectin times for RCDs relate to prosp ctive resid al fault c r ents

sig ificantly hig er than the rated resid al o eratin c r ent ( ypical y 5 I

∆n) Testin at I

∆n

may b s ficient

D.6.4.3.7.3 Me s reme t of the e rth fa lt loop impe a c : Con ideration of th

incre s of th re ista c of th cond ctors with the incre s of

temperature

As the me s rements are made at ro m temp rature, with low c r ents, the proced re

des rib d here may b fol owed to ta e into ac ou t the in re se of the resistan e of the

con u tors with the in re se of temp rature d e to faults, to verify, for TN s stems, the

compl an e of the me s red value of the e rth fault lo p imp dan e with the req irements of

IEC 6 3 4-4-41:2 0 , 41 4

Trang 30

The req irements are con idered to b met when the me s red value of the fault lo p

imp dan e satisfies the fol owing eq ation:

a0

s

32

)(

IU

is the l ne con u tor to e rthed neutral voltage (V);

I is the c r ent cau in the automatic dis on ection of the protective device within the

time stated in IEC 6 3 4-4-41:2 0 , 41 3.2.2 or 41 3.2.3 or 41 3.2.4

Where the me s red value of the fault lo p imp dan e ex e d 2U

0/ 3I , a more precise

as es ment of complan e with IEC 6 3 4-4-41:2 0 , Clau e 41 4 may b made, evaluatin

the value of fault lo p imp dan e ac ordin to the fol owin proced re:

a) the s p ly lne con u tor-e rthed neutral lo p imp dan e, Z

e is first me s red at the

origin of the in tal ation;

b) the resistan e of the l ne con u tor an protective con u tor of the distribution circ it s)

are then me s red;

c) the resistan e of the l ne con u tor an protective con u tor of the final circ it are then

me s red;

d) the values of the resistan e me s red in ac ordan e with b) an c) are in re sed on the

b sis of the in re se of the temp rature, ta in into con ideration, in the case of fault

c r ents, the energ let throu h of the protective device;

e) the values of the resistan e in re sed in ac ordan e with d) are final y ad ed to the value

of the s p ly l ne con u tor-e rthed neutral imp dan e, Z

e, so o tainin a re l stic value

of Z

s

u der fault con ition

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Annex E

(informativ )

Model forms for reporting

NOT 1 An e E c ntains re omme d tio s for re ortin o th v rific tio of ele tric l instalatio s (se

Ta les E.1 a d E.2) Natio al c mmite s ma a a t th c nte t to suit n tio al c n itio s a d pra tic s

NOT 2 Th se formsare p rtic larly suita le for d mestic instalatio s

Table E.1 – Ele tric l instal ation v rific tion report (new or altere instal ation)

E ECTRIC L INSTAL ATION VERIFIC TION REPORT (New or altered instal atio )

(IEC 60 6 L w voltage electr i al in talation )

DE AILS OF THE CLIENT

DES RIPTION A D EXT NT OF THE IN TAL ATION Tic b x s as a pr opriate

Desc ptio of instalatio :

New instalatio

e istin instalatio

Alteratio to a

e istin instalatio

(Use c ntin atio sh et if n c s ary) se c ntin atio sh et No:

FOR DESIGN

I/We b in th p rso (s) resp nsible for th d sig of th ele tric l instalatio (as in ic te b my/our sig atures b low),

p r tic lars of w hic ar e d scrib d a o e, h vin e ercise r easo a le skil a d c r e w he c r ryin o t th d sig h re y

DECLA RE th t th d sig work for w hic I/ w e h v b e r esp nsible is to th b st of my/our know le g a d b lef in

a c r da c w ith IEC 6 3 4 e c pt for th d p r tures, if a y , d taie as folow s:

Detais of d p rtures fr om IEC 6 3 4:cla ses to b inserte )

Th e te t of la i ty f th sig atory or th sig ato es is lmite to th w or k d scrib d a o e as th su je t of this re ort

For th DE IG of th instalatio : *(Wh r e th r e is mutu l r esp nsibi ty for th d sig )

Sig ature: Date: Name (IN BLOC LE T RS) Desig er No 1

Sig ature: Date: Name (IN BLOC LE T RS) Desig er No 2*

FOR CON T RU TION

I/We b in th p rso (s) resp nsible for th c nstru tio of th ele tr i al instalatio (as in ic te b my/o r sig atur es

b low), p r tic lar s of w hic are d sc b d a o e, h vin e ercise re so a le skil a d c r e w he c ry in o t th

c nstr uctio h r eb DECLA RE th t th c nstr uctio wor k for whic I/we h v b e resp nsible is to th b st of my / our

know le g a d b lef in a c rd n e w ith IEC 6 3 4 e c pt for th d p rtures, if a y, d taie as folow s:

Detais of d p rtures fr om IEC 6 3 4 (cla ses to b inser te )

Th e te t of la i ty f th sig atory is lmite to th w or k d sc b d a o e as th su je t of this re ort

For CONS R CTION of th instalatio :

Sig ature: Date: Name (IN BLOC LE T RS) Co stru tor

FOR IN PECT ION & T ST ING

I/We b in th p rso (s) resp nsible for th insp ctio & testin of th ele tr i al instalatio (as in ic te b my/our

sig atures b low),p r tic lar s of whic are d sc b d a o e, h vin e er cise re so a le sk il a d c re wh n c ryin o t

th insp ctio & testin h re y DECLA RE th t th w or k for whic I/w e h v b e r esp nsible is to th b st of my/our

know le g a d b lef in a c rd n e w ith IEC 6 3 4 e c pt for th d p rtures, if a y, d taie as folow s:

Detais of d p rtures fr om IEC 6 3 4 (cla ses to b inser te )

Th e te t of la i ty f th sig atory is lmite to th w or k d sc b d a o e as th su je t of this re ort

For INS ECTION A D T S IN of th instalatio :

Sig ature: Date: Name (IN BLOC LE T RS) Insp ctor

NEXT IN PECTION

I/Weth d sig er(s), re omme d th t this instalatio is furth r insp cte a d teste afer a interv l of n t

more th n .y ars/mo ths

Trang 32

P RTICULA S OF SIGNATORIES TO THE E ECTRIC L INSTAL ATION VERIFIC TION REPORT

Detai s of instal atio e r h ele t o e (wh re a plc ab le)

Ty e (e.g ro (s),ta e etc)……… Ele tro e resista c to e rth ………… Ω

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Main switc or circ itbre ker

Ty ea d No of p les Cure t ratin A Volta e ratin V

(a plc ble o ly wh re a R D is suita le a d is use as a main circ it bre k r)

RECOMMEND TION RE ATING TO EXISTING INSTAL ATION – (in th c se of a a ditio or alteratio se

61.4.2)

S HEDUL S

Th ata h d sc e ules are p rt of this d c me t a dthis re ort is v ld o ly wh n th y are ata h d to it

Sc e ules of insp ctio s a d Sc e ules of test results are ata h d

(Enter q a tities of sc e ulesata h d)

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Table E.2 – Ele tric l instal ation condition rep rt (e isting in tal ations)

E ECTRIC L IN TAL ATION CON ITION RE ORT (e istin in talatio s)

Sectio A.Detaisof th cl e t / p rso ord rin th re ort

Name:

Ad re s

Sectio B.Re so for pro ucin thisre ort

Date(s) o whic in pe tio an te tin was carie o t

Sectio C.Detaisof th instal atio which is th su ject ofthis re ort

Oc upier:

Ad re s:

De criptio of premis s (ic as a propriate)

Dome tic Com ercial In u tial Oth r (in lu ebrief d s riptio ) ………

Estimate ag of wirin s stem y ars

Evid n e of ad itio s / alteratio s Ye No Not a p re t If y s,e timateag y ars

In talatio re ord avaia le Ye No Dateof last in pe tio (date)

Sectio D.Exte t a d lmitatio s of insp ctio a d testin

Exte t of th ele tical in talatio c v re by this repor (s e 6 1.4)

It s o ld ben te that ca le c n eale within tu kin an c n uits, u d r flo rs an g n raly within th fa ric of th buidin

or u d rgro n ,hav n t be n in pe te u le s spe ificaly agre d betwe nth cle t an in pe tor prior to th in pe tio

Sectio E Summary of th co ditio of th instalatio

Ge eral c n itio of th in talatio (in terms of ele tical safety)

Ov ral as e sme t of th in talatio interms of its s ita i ty for c ntin e u e

S TISFA TOR / U S TISFA TOR * (Delete as a propriate)

*An u satisfactory as e sme t in icate that dan ero s an /or pote tialy dan ero s c n itio s hav be n id ntifie

Sectio F Recomme d tio s

Wh re th o eral as e sme t of th s ita i ty of th in talatio for c ntin e u e a o e is state as U S TISFA TOR , I / we

re om e d that an obs rvatio s clas ifie as ‘Da g r prese t’ (Co eC1) or ‘Pote tialy da g ero s’ (Co e C2) areacte upo

as a mater of urg n y

In e tigatio with ut d lay is re omme d d for obs rvatio s id ntifie as ‘R eq uirin furth r in estig atio ’

Obs rvatio s clas ifie as ‘Impro eme t rec om e ded’ (Co e C3) s o ldbe giv nd ec n id ratio

Subje t to th n c s ary reme ial actio bein tak n, I / we re om e dthat th in talatio is furh r in pe te an te te by

(date)

Sectio G Declaratio

I/We,b in th p rso (s) resp nsible for th insp ctio a d testin of th electrical instalatio (as in icate b my/o r

sig atures b low), p rticulars of which are d s rib d a o e,h vin e ercise re so a le ski a d care wh n caryin

o t th insp ctio a d testin , h re y d clare th t th informatio in thisre ort,inclu in th o serv tio s a dth

atach d s h d les, pro id s a ac urate as es me t of th co ditio of th electricalinstalatio ta in into ac o nt

th state e te t a d lmitatio s in sectio D of this re ort

Name(Ca itals) Name (Ca itals)………

Sig ature Sig ature

Foro be alf of Foro be alf of

Po itio Po itio

Ad re s Ad re s

Date Date

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Sectio H.Sch d le(s)

.s h d le(s) of in pe tio an s h d le(s) of te t re ults are atac e

Th atac e s h d le(s) arep r of this d c me t an this repor is valdo ly wh n th y are atac e to it

Sectio I Su ply ch racteristic a d e rthin ar a g me ts

.kA

External lo p impe an e,Z

e(2)

-phas ,

3-wire

3- pole (Note: () b e quiry,(2) b e q iry,

c alc ulatio or me sureme t)

Alternativ s urc of s p ly (as d taie o atac e s h d le)

Sectio J.Particulars of instalatio refer e to in re ort

Me ns of e rthin Detais of instalatio e rth electro e (wh rea plca le)

Sectio K.Main protectiv co d ctors

2

Co n ctio / c ntin ity v rifie

Mainprote tiv

To in omin gas s rvic Toin omin oi s rvic To stu tural ste l

Tolg tnin prote tio To oth r in omin s rvic (s) Spe ify

Sectio L Main switch / switch-use / circuitbre k r / R D

Lo atio Cur e t ratin A If R D main switch

Type) Voltag ratin V

Rate re id al operatin c re t (I

n) mA

Meas re operatin time(at (I

n) .ms

Sectio M.Observ tio s

Referin to th atac e s h d le of in pe tio an te t re ults, an s bje t to th lmitatio s spe ifie at th Exte t a d

lmitatio s of th insp c tio a d testin s ctio

No reme ial actio is re uire Th folowin obs rvatio s are mad

On of th folowin c d s, as a propriate,has be n alo ate toeac of th obs rvatio s mad a o e toin icate toth

pers n(s) re po siblefor th in talatio th d gre of urg n y forreme ial actio

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C1 – Dan er pre e t.Ris of injury Imme iate reme ial actio re uire

C2– Pote tialy dan ero s – urg nt reme ial actio re uire

C3– Impro eme t re om e d d

Note for th perso pro u ing th rep r :

1) This re ort sh uldo ly b use for th re ortin o th c n itio of a e istin ele tric l instalatio

2) Th re ort, n rmaly c mprisin at le st six p g s, sh uld in lu e sc e ules of b th th insp ctio a d th

test results Ad itio al p g s ma b n c s ary for oth r th n a simple instalatio Th n mb r of e c

p g sh uld b in ic te , to eth r with th total n mb r of p g s in olv d

3) Th re so for pro u in this re ort, su h as c a g of o c p n y or la dlord’s p rio ic mainte a c , sh uld

b id ntifie in Se tio B

4) Th ma imum prosp ctiv fa lt c re t (I

pf) re ord d sh uld b th gre ter of eith r th sh rtcirc it c re t

or th e rth fa lt c re t

5) Th se eleme ts of th instalatio th t are c v re b th re ort a d th se th t are n t sh uld b id ntifie in

Se tio D (Exte t a d lmitatio s) Th se asp cts sh uld h v b e a re d with th p rso ord rin th

re ort a doth r intereste p rties b fore th insp ctio a d testin is c rie o t An o eratio al

lmitatio s, su h as in bi ty to g in a c s to p rts of th instalatio or a item of e uipme t, sh uld also

b re ord din Se tio D

6) Th summary of c n itio of th instalatio in terms of safety sh uldb cle rly in ic te in Se tio E

Observ tio (s), if a y, sh uld b c te orise in Se tio M usin th c din C1 to C3 as a pro riate An

o serv tio giv n a C1 or C2 clas ific tio sh uld result in th o eral c n itio of th instalatio b in

re orte as u satisfa tory

7) Wh re a instalatio h s a altern tiv so rc of su ply a furth r sc e ule of su ply c ara teristics a d

e rthin d tais b se u o Se tio Iof this re ort sh uld b pro id d

8) Wh re a o serv tio re uires furth r in estig tio b c use th insp ctio h s re e le a a p re t

d ficie c whic c uld n t, owin to th e te t or lmitatio s of this insp ctio , b fuly id ntifie , this sh uld

b in ic te in th c lumn h a e “Furth r in estig tio re uire ” within Se tio M

9) Th d te b whic th n xt ele tric l instalatio c n itio re ort is re uire sh uld b giv n in Se tio F Th

interv l b twe n insp ctio s sh uld ta e into a c u t th ty e a d usa e of th instalatio a d its o eral

c n itio

10) If th sp c a aia le for o serv tio s in Se tio M is insuficie t, a ditio al p g s sh uld b pro id d as

n c s ary

1 ) Wh re er pra tic ble, items clas ifie as ‘Da g r prese t’ (C1) sh uld b ma e safe o disc v ry Wh re this

is n t pra tic l th own r or user sh uld b giv n write n tific tio as amater of urg n y

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This rep r is an imp r ant an v lu ble d c ment whic s ould beretained for future referenc

This re ort form is for re ortin o th c n itio of a e istin ele tric l instalatio

1) Th p rp se of this c n itio re ort is to c nfirm, so far as re so a ly pra tic ble, wh th r or n t th

ele tric l instalatio is in a satisfa tory c n itio for c ntin e servic (se Se tio E) Th re ort sh uld

id ntify a y d ma e,d terioratio , d fe ts a d/or c n itio s whic ma giv rise to d n er (se Se tio M)

2) Th p rso ord rin th re ort sh uld h v re eiv d th origin l re ort a d th insp ctor sh uld h v retain d

a d plc te

3) Th origin l re ort sh uld b retain d in a safe pla e a d b ma e a aia le to a y p rso insp ctin or

u d rta in work o th ele tric l instalatio in th future If th pro erty is v c te , this re ort wi pro id

th n w own r /o c pier with d tais of th c n itio of th ele tric l instalatio at th time th re ort was

is u d

4) Se tio D (Exte t a d lmitatio s) sh uld id ntify fuly th e te t of th instalatio c v re b this re ort a d

a y lmitatio s o th insp ctio a d testin Th insp ctor sh uld h v a re d th se asp cts withth p rso

ord rin th re ort a d with oth r intereste p rties (lc nsin a th rity, insura c c mp n , mortg g

pro id r a d th lk ) b fore th insp ctio was c rie o t

5) Someo eratio allmitatio s su h as in bi ty to g in a c s to p rts of th instalatio or a item of e uipme t

ma h v b e e c u tere d rin th insp ctio Th insp ctor sh uld h v n te th se in Se tio D

6) For items clas ifie in Se tio M as C1 (“Da g r prese t”), th s fety of thos u ing th instal atio is at

risk, a d it is re omme d d th t a c mp te t p rso u d rta es th n c s ary reme ial work imme iately

7) For items clas ifie in Se tio M as C2 (“Pote tialy d n ero s”), th s fety of thos u ing th instal atio

ma be at risk a d it is re omme d d th t a c mp te t p rso u d rta es th n c s ary reme ial work as a

mater ofurg n y

8) Wh re it h s b e state in Se tio M th t a o serv tio re uires furth r in estig tio th insp ctio h s

re e le a a p re t d ficie c whic c uld result in a c d C1 or C2 item th t c uld n t, d e to th e te t or

lmitatio s of th insp ctio , b fuly id ntifie In su h c ses a furth r e amin tio of th instalatio wi b

n c s ary, with ut d la , to d termin th n ture a d e te t of th a p re t d ficie c (se Se tio F)

9) For safety re so s, th ele tric l instalatio wi n e to b re-insp cte at a pro riate interv ls b a

c mp te t p rso Th re omme d d d te b whic th n xt insp ctio is d e is state in Se tio F of th

re ort u d r ‘Re omme d tio s’

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Annex F

(informativ )

Model forms for inspection of electrical instal ations

NOT An e F c ntains re omme d tio s for re ortin o th v rific tio of ele tric l instalatio s Natio al

c mmite s ma a a t th c nte t to suit n tio al c n itio s a d pra tic s

F.1 Model schedule for items requiring inspection for initial verification of an

electrical instal ation

Al items in p cted in order to confirm complan e with the relevant clau es in the IEC 6 3 4

series The l st of items is not ex au tive

ELECTRICAL INTAKE EQUIPMENT

 Service ca le

 Service c t out / fu e

 Meter tai s – Distributor

 Meter tai s – Con umer

 Cor ect con ection of generator in p ral el

 Comp tibi ty of c aracteristic of me n of generation

 Me n to provide automatic dis on ection of generator in the event of los of publc

s p ly s stem or voltage or freq en y deviation b yon declared values

 Me n to prevent con ection of generator in the event of los of publ c s p ly s stem or

voltage or freq en y deviation b yon declared values

 Me n to isolate generator from the publ c s p ly s stem

 Main e rthin / b n in ar an ements

 Distributor’s e rthin ar an ement or in tal ation e rth electrode ar an ement

 Earthin con u tor an con ection

 Main protective b n in con u tors an con ection

 Earthin / b n in la els at al a pro riate location

Ac es ibi ty of

 Earthin con u tor con ection

 Al protective b n in con ection

 FELV – req irements satisfied

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OTHER METHODS OF PROT CTION

(Wh re a y of the methods l ste below are employ d detai s s ould be provide on

 Reinforced in ulation

BASIC PROTECTION:

 In ulation of l ve p rts

 Bar iers or en los res

 Obstacles

 Placin out of re c

 Non-con u tin location – e rth- re local eq ip tential b n in

 Suita i ty of en los res for IP an fire ratin s

 En los res not damaged d rin in tal ation

 Presen e an ef ectivenes of o stacles

 Placin out of re c

 Presen e of main switc (es), lnk d where req ired

 Op ration of main switc (es) ( u ctional c eck)

 Man al o eration of circ it bre k rs an RCDs to prove fu ctional ty

 Confirmation that integral test buton / switc cau es RCD(s) to trip when o erated

( u ctional c eck)

 RCD(s) provided for fault protection, where sp cified

 RCD(s) provided for ad itional protection, where sp cified

 Confirmation over-voltage protection (SPDs) provided where sp cified

 Confirmation of in ication that SPD is fu ctional

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 Presen e of RCD q arterly test notice at or ne r the origin

 Presen e of diagrams, c arts or s hed les at or ne r e c distribution b ard, where

req ired

 Presen e of non-stan ard (mixed) ca le colour warnin notice at or ne r the a pro riate

distribution b ard, where req ired

Presen e of alternative s p ly warnin notice at or ne r

 The origin

 The meter p sition, if remote form origin

 The distribution b ard to whic the alternative/ad itional sources are con ected

 Al p ints of isolation of AL sources of s p ly

 Presen e of next in p ction recommen ation la el

 Presen e of other req ired la el n

 Selection of protective device(s) an b se(s); cor ect typ an ratin

 Sin le-p le protective devices in l ne con u tor only

 Protection again t mec anical damage where ca les enter eq ipment

 Protection again t electromag etic efects where ca les enter fer omag etic en los res

 Confirmation that al con u tor con ection , in lu in con ection to bu b rs are

cor ectly located in terminals an are tig t an sec re

CIRCUITS

 Identification of con u tors

 Ca les cor ectly s p orted throu hout

 Examination of ca les for sig s of mec anical damage d rin in tal ation

 Examination of in ulation of l ve p rts, not damaged d rin erection

 Non-s e thed ca les protected by en los re in con uit, d ctin or tru kin

 Suita i ty of containment s stems (in lu in flexible con uit

 Cor ect temp rature ratin of ca le in ulation

 Ca les cor ectly terminated in en los res

 Adeq ac of ca les for c r ent car yin ca acity with regard for the typ an nature of

in tal ation

 Adeq ac of protective devices: typ an fault c r ent ratin for fault protection

 Presen e an adeq ac of circ it protective con u tors

 Co rdination b twe n con u tors an overlo d protective devices

 Wirin s stems an ca le in tal ation method / practices with regard to the typ an

nature of in talation an external influen es

 Ca les con e led u der flo rs, a ove cei n s, in wal s adeq ately protected again t

damage by contact with fixin s

Provision of ad itional protection by RCD s havin resid al rated o eratin c r ent (I

∆n) not

 For ca les con e led in wal s at a de th of les than 5 mm

 Provision of fire b r iers, se l n ar an ements so as to minimize the spre d of fire

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