IS 14415: Volt-Amphere hour meters for restricted power factor range [superseding IS:722 (Part 5):1980

26 Pages·1997·2.5 MB·English

by  Bureau of Indian Standards

इंटरनेट मानक
Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to
information for citizens to secure access to information under the control of public authorities,
in order to promote transparency and accountability in the working of every public authority,
and whereas the attached publication of the Bureau of Indian Standards is of particular interest
to the public, particularly disadvantaged communities and those engaged in the pursuit of
education and knowledge, the attached public safety standard is made available to promote the
timely dissemination of this information in an accurate manner to the public.
“जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ”
Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru
“The Right to Information, The Right to Live” “Step Out From the Old to the New”
IS 14415 (1997): Volt-Amphere hour meters for restricted
power factor range [superseding IS:722 (Part 5):1980 [ETD
13: Equipment for Electrical Energy Measurement and Load
Control]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”

IS14415:1997
[Superseding IS 722 (Part 5): 19801
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*-pTcffsTti~-mk
Indian Standard
VOLT-AMPEREHOURMETERS
FORRESTRICTEDPOWER.FACTOR
RANGE-SPECIFICATION
ICS 17.220.20

0 BIS 1997
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
May 1997 Price Group 8
tnempiuqE rof lacirtcelE ygrenE stnemerusaeM and daoL lortnoC lanoitceS ,eettimmoC TE 13
FOREWORD
sihT naidnI dradnatS was detpoda yb eht uaeruB fo naidnI Standards, retfa eht tfard dezilanif yb eht
tnempiuqE rof lacirtcelE ygrenE stnemerusaeM and daoL lortnoC lanoitceS eettimmoC had neeb
devorppa yb eht lacinhcetortcelE noisiviD .licnuoC
sffiraT desab no tnerappa ,rewop that is no mumixam dnamed ,AVK evah an reve gnisaercni ecnatropmi
* yllaiceps ni aidnI erehw sdaol eud ot ,srotom yrucrem ,ruopav muidos ruopav and tnecseroulf gnithgil
ekat a rehgihhcum erahs fo eht latot rewop .yticapac sihT tnerappa rewop nac eb derusaem yb stnemurtsni
and sdohtem gnivah a yltcirts detcirtser egnar fo .noitacilppa ehT deen was tlef ot ezidradnats tnerappa
ygrene sretem that is erepma-tlov ruoh sretem rof detcirtser rewop rotcaf .egnar sihT tnemeriuqer was
yllanigro derevoc ni SI 722 traP( )5 AC yticirtcele :sretem traP 5 erepma-tlov ruoh sretem rof detcirtser
rewop rotcaf ,egnar class 3.5 dehsilbup ni 1985. ehT standard was neht desiver ni 1980.
sihT standard srevoc ruoh-erepma-tlov sretem rof detcirtser rewop rotcaf egnar htiw rehgih .noisicerp
sihT standard osla srevoc eht sustained ycarucca tset and dednemmocer sampling plan rof eht ecnatpecca
fo eht .tol
noitnettA is drawn ot eht tcaf that eht stimil fo srorre deificeps ni this standard era rehgih than esoht
detalupits ni eht EI tcA 57 .)6591( sihT is ni weiv fo eht tcaf that eht sretem derevoc ni this standard era
ton yranidro ruoh-erepma-tlov sretem ecnis noitarbilac ecnarelot has osla neeb dewolla ni noitidda ot
laciteroeht rorre rof gniteem eht ycarucca stnemeriuqer derevoc ni eht standard.
ehT ruoh-erepma-tlov sretem derevoc ni this standard gnoleb ot a ralucitrap yrogetac fo eht erom
dezilareneg ruoh-Q sretem and deedni eseht era noitcudni epyt ruoh-ttaw sretem htiw snoitacifidom
detacidni :woleb
)a egatloV deilppa ot eht gniretem stnemele era esahp decalpsid yllareneg yb 30 eerged htiw esahp
sretfihs ro gnitfihs-esahp otua remrofsnart ro yb gnisahp-ssorc fo eerht esahp .egatlov
)b egtaloV ro/dna tnerruc sexulf era rehtruf ,deggal as deriuqer rof eht yrassecen esahp tfihs fo eht
egatlov sexulf evitaler ot eht tnerruc .sexulf

esehT sretem evah eht lareneg ycneicifed fo tcerrocni noitartsiger fo eht evitagen ecneuqes tnenopmoc
fo -tloveht erepma ruoh ni esac fo ecnalabnu ni segatlov ro/dna .tnerruc nehW eht segatlov era ,decnalab
this rorre is yllatot detanimile ro yltaerg deziminim evitcepserri fo yna ecnalabnu ni .stnerruc
sihT standard shall eb daer ni noitcujnoc htiw SI 722 traP( )1 : 1986 AC yticirtcele sretem : traP 1 lareneG
stnemeriuqer and tset driht( .)noisiver nI eht noitaraperp fo this standard, assistances has neeb devired
morf noitacilbupCEI 211 : 1966 mumixaM dnamed ,srotacidni Class 1.0 tsrif( .)noitide
roF eht esoprup fo gnidiced rehtehw a ralucitrap tnemeriuqer fo this standard is deilpmoc ,htiw eht lanif
,eulav devresbo ro ,detaluclac gnisserpxe eht tluser fo a ,tset shall eb dednuor ffo ni ecnadrocca htiw
SI 2 : 1960 seluR‘ rof gnidnuor ffo laciremun seulav .‘)desiver( ehT rebmun fo tnacifingis secalp deniater
ni eht dednuor ffo eulav dluohs eb eht emas as that fo eht deificeps seulav ni this standard.
IS 14415 : 1997
Indian Standard
VOLT-AMPEREHOURMETERS
FORRESTRICTEDPOWERFACTOR
RANGE-SPECIFICATION
3.4 reteM rotoR
1 SCOPE
sihT standard seificeps eht stnemeriuqer and ehT gnivom tnemele fo eht retem nopu hcihw eht
1.1
stset rof 3 esahp elohw tnerruc and remrofsnart citengam sexulf fo dexif gnidniw and fo gnikarb
detarepo erepma-tlov ruoh sretem rof detcirtser stnemele tca and hcihw setarepo eht .retsiger
rewop rotcaf egnar htiw mumixam dnamed -ni
3.5 reteM gnivirD tnemelE
rotacid and rehto ffirat secived ro seirossecca rof
decnalabnu daol rof esu ni esahp-3 eriw-3 and A gnikrow trap fo eht retem hcihw secudorp a
esahp-3 .seilppus~eriw-4 euqrot yb eht noitca fo its citengam sexulf nopu eht
stnerruc decudni ni eht gnivom .tnemele tI
1.1.1 roF mumixam dnamed ,srotacidni eht -er
yllareneg sesirpmoc stengamortcele htiw rieht
stnemeriuq derevoc ni SI 8530 : 1977 shall .ylppa
lortnoc .secived
1.2 tI seod ylppa’ton :ot
3.6 reteM gnikarB tnemelE
)a erepma-tloV ruoh sretem rof detcirtsernu ehT trap fo eht retem hcihw secudorp a gnikarb
lluf rewop rotcaf ,egnar and euqrot yb eht noitca fo its citengam xulf nopu eht
)b erepma-tlov ruoh sretem ni hcihw eht stnerruc decudni ni eht gnivom .tnemele tI
elpicnirp fo tnemerusaem seriuqer decnalab sesirpmoc eno ro erom stengam and rieht adjusting
snoitidnoc fo daol .ylno .secived
NOTE - ehT noitacilppa dna noitarepo fo -tiov 3.7 retsigeR fo a reteM gnitnuoC( msinahceM fo
ruoh-erepma sretem era nevig ni xennA .A
a )reteM
2 SECNEREFER
ehT trap fo eht retem hcihw sretsiger eht ,ygrene ro
2.1 naidnI Standards nevig ni xennA B era erom yllareneg eht eulav fo eht ytitnauq derusaem
yrassecen stcnujda ot this standard. yb eht .retem
3 YGOLONIMRET 3.8 reteM esaB

3.0 roF eht esoprup fo this standard, eht gniwollof ehT kcab fo eht retem yb hcihw ti is yllareneg dexif
snoitinifed shall .ylppa and ot hcihw era dehcatta eht ,emarf eht slanimret
ro eht lanimret kcolb and eht .revoc roF a -hsulf
3.1 erepmA-tloV ruoH reteM tnerappA(
Energy ,detnuom ti yam edulcni eht sides fo eht .esac
Meter)
3.9 reteM tekcoS
gnitargetni tnemurtsni hcihw serusaem
An
An erusolcne htiw jaws ot etadommocca slanimret
tnerappa ygrene ni -tlov erepma sruoh ro ni
fo a elbahcated retem and hcihw has rotcennoc
elbatius selpitlum .foereht
morf eht noitanimret fo eht tiucric .srotcudnoc tI
3.2 noitcudnI reteM yam eb a noitisop-elgnis tekcos rof eno retem ro a
noitisop-itlum tekcos rof owt ro erom .sretem
A retem ni hcihw stnerruc deirrac yb dexif slioc
tcaer htiw eht stnerruc detcudni ni a gnitcudnoc 3.10 reteM revoC
gnivom ,tnemele yllareneg a ,)s(csid hcihw sesuac
ehT erusolcne ni tnorf fo~ eht retem edam rehtie
rieht .tnemevom
yllohw fo tropsnart lairetam ro euqapo lairetam
3.3 etar-itluM reteM dedivorp htiw hguorht/)s(wodniw hcihw eht -evom
tnem fo eht rotor nac eb nees and eht retsiger nac
A retem dedivorp htiw a retsiger gnitsisnoc fo erom
eb .daer
than eno tes fo drums ro dials, hcae tes gnimoceb
evitarepo at semit gnidnopserroc ot tnereffid ffirat 3.11 reteM Case
.setar sihT sesirpmoc eht esab and eht .revoc
1
SI 14415 : 7991
3.12 reteM emarF 3.22 ecnerefeR egatloV
ehT trap ot hcihw era dexiffa eht gnivird stnemele ehT eulav fo egatlov ni ecnadrocca htiw hcihw eht
and yllausu eht rotor ,sgniraeb eht ,retsiger eht tnaveler ecnamrofrep fo eht retem is .dexif tI is
gnikarb tnemele and eht adjusting .secived detacidni ni rms ,eulav unless esiwrehto .deificeps
3.13 elbisseccA gnitcudnoC traP 3.23 ycneuqerFecnerefeR
A gnitcudnoc trap hcihw nac eb dehcuot yb eht ehT eulav fo niycneuqerf ecnadrocca htiw hcihw
standard tset regnif nehw eht retem is dellatsni eht tnaveler ecnamrofrep fo eht retem is .deuf
ydaer rof .esu
3.24 cisaB deepS
ETON - oT enimreted rehtehw a trap si ,elbissecca rehtie
ehT lanimon deeps fo noitator fo eht rotor -xe
lausiv noitcepsni llahs eb desu ; or eht elbixelf tset regnif nevig
ni .giF 1 SI~fo 1041 : ,0791 ro eht digir tset regnif nevig ni desserp ni snoitulover rep etunim nehw eht retem
.giF 2 fo IS :1041 0791 llahs eb .deilppa nI esac fo ,tbuod eht is rednu ecnerefer snoitidnoc and seirrac cisab
rettal llahs eb deilppa htiw a numixam ecrof fo 03 .N tnerruc at soc Cp ro( sin )@ = 1, as .elbacilppa
3.14 evitcetorP htraE lanimreT
3.25 cisaB euqroT
ehT lanimret detcennoc ot elbissecca gnitcudnoc
ehT lanimon eualv fo euqrot no eht rotor at tser
parts fo a retem rof noitcennoc ot eht .htrae
nehw eht retem is rednu ecnerefer snoitidnoc and
3.15 lanimreT kcolB deirrac cisab tnerruc at ~0s ro(@ sin )a = 1, as
.elbacilppa
A troppus edam fo insulating lairetam no hcihw all
ro emos fo eht slanimret fo eht retem era depuorg 3.26 reteM tnatsnoC
.rehtegot
tnatsnoC gnisserpxe eht noitaler neewteb ygrene
3.16 lanimreT revoC deretsiger yb eht retem and gnidnopserroc rebmun
fo snoitulover fo eht ,rotor desserpxe ni snoitulover
A revoc hcihw sesolcne eht retem slanimret and, fi
rep olik ruoh-ttaw .)hWk/ver(
,deriuqer eht sdne fo eht lanretxe seriw ro selbac
detcennoc ot eht .slanimret 3.27 ecnerefeR erutarepmeT
3.17 tnerruC tiucriC ehT tneibma erutarepmet deificeps rof ecnerefer
.snoitidnoc
ehT gnidniw fo eht gnivird tnemele and eht lanretni
3.28 ecnaraelC
snoitcennoc fo eht retem hguorht hcihw swolf eht
tnerruc fo eht ,tiucric ot hcihw eht retem is ehT tsetrohs ecnatsid derusaem ni ria neewteb
.detcennoc evitcudnoc parts.
ETON - nehW eht retem setaroprocni a tnerruc -snart 3.29 egapeerC ecnatsiD
remrof eht tnerruc tiucric osla sedulcni eht remrofsnart
.sgnidniw ehT tsetrohs ecnatsid derusaem revo ecafrus fo
3.18 egatloV tiucriC noitalusni neewteb eht evitcudnoc parts.
ehT gnidniw fo eht gnivird tnemele and lanretni 3.30 egatnecreP rorrE
snoitcennoc fo eht ,retem deilppus htiw egatloveht
ehT egatnecrep rorre as denimreted morf retem
fo eht tiucric ot hcihw eht retem is .detcennoc
noitartsiger is nevig yb eht gniwollof :alumrof
3.19 yrailixuA tiucriC
R-A
egatnecreP rorre = 7 ool
x
ehT stnemele (windings, lamps, ,stcartnoc )cte and
erehw
snoitcennoc fo an yrailixua ecived nihtiw eht retem
esac dednetni ot eb detcennoc ot an lanretxe ,ecived R = ygrene deretsiger yb eht ,retem and
rof ,elpmaxe kcolc yaler and eslupmi .retnuoc A = eurt .ygrene
3.20 cisaB tnerruC )bZ( ehT egatnecrep rorre is denimreted morf rotor
deeps as :gniwollof
ehT eulav fo tnerruc ni ecnadrocca htiw hcihw eht
tnaveler ecnamrofrep fo eht retem is .dexif egatnecreP rorre = tT-t x ioo
3.21 detaR mumixaM tnerruC )amI( erehw
eurt emit ro eht emit a tcerroc retem
T =
ehT tsehgih eulav fo tnerruc at hcihw eht retem
dluow eriuqer rof eht emas rebmun fo
stroprup ot teem eht ycarucca stnemeriuqer fo this
snoitulover fo eht ,rotor and
standard. tI is detacidni ni rms ,eulav unless -rehto
t =‘ lautca emit ro( emit as )devresbo nekat
esiw .deificeps
rof a nevig rebmun fo .snoitulover

2
SI 14415 : 1997
3.31 noitairaV fo rorrE euD ot an ecneulfnI a) ralimis lacigolortem ,seitreporp
ytitnauQ b) eht emas mrofinu noitcurtsnoc fo trap
gninimreted eseht ,seitreporp
ehT ecnereffid neewteb egatnecrep srorre fo retem
4 eht emas rebmun fo snrut-erepma rof eht
nehw ylno eno ecneulfni ytitnauq assumes -seccus
tnerruc gnidniw at cisab tnerruc and eht
ylevis owt deificeps .seulav
emas rebmun fo eht turns rep tlov rof eht
3.32 ecneulfnI ytitnauQ ro rotcaF egatlov gnidniw at ecnerefer ,egatlov and
4 eht emas oitar fo eht detar mumixam
ynA ytitnauq ro yna rotcaf rehto than eht derusaem
tnerruc ot eht cisab .egatlov
ytitnauq esohw stceffe yam yfidom eht derusaem
.stluser yehT yam evah lareves seulav fo cisab tnerruc and
lareves seulav fo ecnerefer .egatlov
3.33 noitrotsiD rotcaF
esehT sretem era detangised yb eht rerutcafunam
ehT oitar fo rms eulav fo eht cinomrah tnetnoc
yb eno ro erom spuorg fo srettel ro ,rebmun ro fo a
deniatbo( yb gnitcartbus morf a ladiosunis-non
noitanibmoc fo srettel and .srebmun hcaE epyt has
gnitanretla ,ytitnauq its latnemadnuf )tnenopmoc
eno noitangised .ylno
ot eht eulavsmr fo eht ladiosunis-non .ytitnauq ehT
noitrotsid rotcaf is yllausu desserpxe as a -tnecrep NOTES
.ega 1 ehT epyt si detneserper yb eht elpmas )s(retem dednetni
rof epyt stset dna esohw scitsiretcarahc cisab( tnerruc dna
3.34 naeM erutarepmeT tneicIlfeoC
ecnerefer )egatlov era nesohc morf eht seulav fo soitar
desoporp yb eht .rerutcafunam
ehT oitar fo noitairav fo egatnecrep rorre ot eht
egnahc fo erutarepmet hcihw decudorp this 2 erehW eht rebmun fo snrut-erepma dluow dael ot a -mun
reb fo snrut nahtrehto a esohw ,rebmun eht tcudorp fo eht
.noitairav
rebmun fo snrut fo eht sgnidniw yb eht eulav fo eht cisab
3.35 lacitreV gnikroW noitisoP tnerruc yam reffid morf taht fo eht elpmas )s(retem -erper
evitatnes fo eht .epyt tI si elbasivda ot esoohc eht txen rebmun
ehT noitisop fo eht retem ni hcihw eht tfahs fo eht yletaidemmi evoba ro woleb ni redro ot evah elohw rebmun
fo .snrut ylnO rof siht ,nosaer yam eht rebmun fo snrut rep
rotor is .lacitrev
tlov fo eht egatlov sgnidniw ,reffid tub yb ton erom naht 20
3.36 Class xednI tnecrep morf taht fo eht elpmas sretem evitatneserper fo eht
.epyt
A rebmun hcihw sevig eht stimil‘ fo elbissimrep
3 ehT oitar fo eht tsehgih ot eht tsewol cisab deeps fo eht
segatnecrep ,rorre rof all seulav fo tnerruc neewteb srotor fo hcae fo eht sretem fo eht emas epyt llahs ton deecxe
10 tnecrep fo 1, and ,........l rof soc Cp (sin )@ = 1, as 1.5.
elbacilppa dna( ni eht esac fo esahpylop sretem
3.40 enituoR stseT
htiw decnalab )sdaol nehw eht retem is detset rednu
ecnerefer snoitidnoc gnidulcni( dettimrep
stseT deirrac tuo no hcae retem ot kcehc -mrofnoc
ecnarelot no eht ecnerefer )seulav as denifed ni this
yti htiw eht stnemeriuqer fo this standard ni stcepsa
standard.
hcihw era ylekil ot yrav gnirud .noitcudorp
3.37 noitacifissalC elgnA eergeD( fo esahP
)tnemecalpsiD 3.41 ecnatpeccA stseT
ehT lanimon esahp tnemecalpsid neewteb egatlov stseT deirrac tuo no samples nekat morf a tol rof
and tnerruc citengam sexulf fo a elgnis gnivird eht esoprup fo ecnatpecca fo eht .tol
tnemele ees( )etoN ni eht lapicnirp ria gaps nehw
eht egatlov and tnerruc deilppa ot this elgnis -ele 3.42 naeM rewoP rotcaF
tnem era ni .esahp
ehT rewop rotcaf gnidnopserroc ot eht naem -ruc
NOTE - gnivirD tnemele sedulcni yna yrassecen -ca tner rotcev elgna fo eht retuo stimil fo eht rewop
,seirossec ,srotsiser srotcudni dna .stnuhs
rotcaf egnar .deificeps
3.38 epyT stseT
NOTE-The gniwollof rettel slobmys evah neeb desu ni siht
tseT deirrac tuo ot evorp ytimrofnoc htiw eht dradnats ot etoned suoirav rewop srotcaf ni eht detcirtser
stnemeriuqer fo this standard. era~esehT dednetni rewop rotcaf egnar dna eht gnidnopserroc tnerruc rotcev
ot evorp eht lareneg seitilauq and ngised fo a nevig :selgna
epyt fo .retem U = reppu timil fo eht rewop rotcaf egnar at hcihw eht
laciteroeht rorre si eht mumixam -rocevitagen
3.39 epyT gnidnopser ot eht ycarucca .ssalc
1 = rewol timil fo eht rewop rotcaf egnar at hcihw eht
noitangiseD desu rof gninifed a ralucitrap ngised fo
laciteroeht rorre si eht mumixam -rocevitagen
retem derutcafunam yb eno ,rerutcafunam gnivah : gnidnopser ot eht ycarucca .ssalc

3
IS 14415 : 1997
m = naem rewop rotcaf ta hcihw eht laciteoreht rorre si 4 NOITACIFISSALC AND POWER ROTCAF
eht mumixam evitisop gnidnopserroc ot eht -ca EGNAR
ycaruc .ssalc
ou = reppu rewop rotcaf ta hcihw eht laciteroeht rorre si 4.1 ehT erepma-tlov ruoh sretem shall eb -salc
.orez deifis as class 1 - 1, class 1 - 2 and class 2.5 - 2, and
ol = reppu rewop rotcaf ta hcihw eht laciteroeht rorre si shall evah rewop rotcaf segnar as deificeps ni
.orez elbaT 1. nI ycarucca ,noitacifissalc eht tsrif laremun
erehw CDU, CDi, <Dm, Qu and z@ = tnerruC rotcev setoned eht laciteroeht rorre timil fo a detcirtser
selgna gnidnopserroc ot eht rewop srotcaf u, ,i rewop rotcaf egnar kVAh retem and eht dnoces
m,
and I .ylevitcepser laremun setoned eht ycarucca class fo eht cisab
UI.,
ruoh-ttaw retem .desu
elbaT 1 Restricted Power Factor Ranges and Accuracy Class
(Clause 4.1)
AVk ffiraT S rcwo 5.0 - 0.1 76.0 - 89.0
rotcaf egnar
dednemmoceR esu 05.0 - 08.0 5.0 - 9.0 66.0 - 09.0 76.0 - 89.0
fo retem rewop dna dna dna
rotcaf )’segnar 57.0 - 59.0 8.0 - 0.1 28.0 - 89.0
dna
29.0 - 0.1
hAVk laciteroeht ?Z %0.1 :fr %5.2 + %0.1 + %5.2
rorre timil
dednemmoceR -ttaw
ruoh ycarucca ssalc 0.1 0.2 0.2 0.1 0.2 0.2
___~
hAVk ycarucca
ssalc noitangised l-l 2-l 5.2 2- l-1 2-l 5.2 - 2
yllareneG)* eseht era gniggal rewop .srotcaf
5 RATINGS 6 LARENEG AND LANOITCURTSNOC
STNEMERIUQER
5.1 Standard Basic Currents (lb)
6.1 General
ehT standard cisab tnerruc shall eb 5,10,20,30,50
and 100 A rof elohw tnerruc sretem and 1 and 5 A reteM shall eb dengised and detcurtsnoc ni hcus a
rof TC detarepo .sretem yaw as ot diova gnicudortni yna regnad ni lamron
use~and rednu lamron ,snoitidnoc os as ot erusne
5.2 Rated Maximum Current (Ima) ytefas against:
)a cirtcele ,kcans
ehT detar mumixam tnerruc shall eb yllareneg
)b stceffe fo evissecxe ,erutarepmet and
120 tnecrep fo eht cisab .tnerruc rehtO seulav ekil
)c daerps fo .erif
200 tnecrep fo eht cisab tnerruc era osla -rep
.elbissim
llA parts hcihw era stcejbus ot noisorroc rednu
lamron gnikrow snoitidnoc shall eb ylevitceffe
5.3 Standard References Voltage
detcetorp against noisorroc eud ot cirehpsomta
.sesuac ynA evitcetorp gnitaoc shall ton eb elbail ot
53.1 Direct Connected Meters
egamad yb yranidro handling ron ylsuoires detceffa
ehT ecnerefer egatlov shall eb eno fo eht standard yb erusopxe ot ,ria rednu lamron gnikrow -noc
metsys segatlov nevig ni SI 12360 : 1988. .snoitid
ehT retem shall evah etauqeda lacinahcem htgnerts
5.3.2
Voltage Transformer Operated Meters
and shall withstand eht snoitautculf fo erutarepmet
ehT ecnerefer segatlov rof eht sretem detcennoc hcihw era ylekil ot rucco ni lamron gnikrow -idnoc
hguorht segatlov sremrofsnart shall eb 110 and .snoit ehT stnenopmoc shall eb ylbailer denetsaf
63.5 V ees[ SI 3156 traP( )1 : 19921. and deruces against .gninesool

4
IS 14415: 1997
ehT lacirtcele snoitcennoc shall eb hcus as ot tI shall eb elbissop ot tcennocsid ylisae eht tnaveler
tneverp yna gninepo fo eht tiucric rednu lamron egatlov .)s(lanimret
snoitidnoc fo ,esu gnidulcni yna daolrevo -idnoc
NOTE - Whether the disconnecting device for the meter
snoit deificeps ni this standard.
voltage circuit will be in the terminal compartment or inside
the meter cover, shall be a matter of agreement between the
ehT noitcurtsnoc fo eht retem shall eb hcus as ot
manufacturer and the purchaser.
eziminim eht risks fo gnitiucric-trohs fo eht insula-
noit neewteb evil parts and elbissecca gnitcudnoc 6.4.2 Fixing of Conductors
parts eud ot latnedicca gninesool ro gniwercsnu fo
rennam fo gnixif eht srotcudnoc ot eht -ret
eht gniriw ,swercs .cte The
minals shall erusne etauqeda and elbarud tcatnoc
ehT retem shall ton ecudorp elbaicerppa esion ni hcus that ereht is on risk fo gninesool ro eudnu
.esu gnitaeh ees( osla .)1.6 wercS snoitcennoc -timsnart
gnit tcatnoc ecrof and wercs sgnixif hcihw yam eb
6.2 Case dednesool and denethgit lareves semit gnirud eht
efil fo eht retem shall wercs aotni latem ,tun -irtcele
ehT retem shall evah a ylbanosaer foorp-tsud ,esac
lac snoitcennoc shall eb os dengised that tcatnoc
hcihw yam eb delaes ni hcus a yaw that eht lanretni
erusserp is ton dettimsnart hguorht insulating
parts fo eht retem era elbissecca ylno retfa gnikaerb
.lairetam
eht seals. ehT revoc shall ton eb elbavomer tuohtiw
eht esu fo a ,loot nioc ro yna ralimis .ecived ehT owT swercs shall eb dedivorp ni hcae tnerruc -ret
gnidloh no and gnilaes swercs shall eb dleh evitpac lanim rof ylevitceffe gnipmalc eht lanretxe sdael ro
ni eht retem .revoc .selbmiht ,ylevitanretlA fi an citsale erusserp etalp
ro ralimis evitceffe ecived is dedivorp ot peek eht
ehT esac shall eb os detcurtsnoc and degnarra that
eritne htgnel fo eht rotcudnoc nihtiw eht lanimret
yna tnenamrepnon noitamrofed tonnac tneverp eht
llew ,desserp eno wercs yam eb .desu hcaE gnipmalc
yrotcafsitas noitarepo fo eht .retem
wercs shall egagne a muminim fo eerht sdaerht ni
eht .lanimret ehT sdne fo swercs shall hcuseb as ton
ehT esac fo a Class 0.5 retem shall eb detcurtsnoc
ot ecreip and tuc eht srotcudnoc .desu
os that, fi detnuom otgnidrocca eht s’rerutcafunam
,snoitcurtsni eht retem shall ton etaived yb erom
sreteM htiw detar mumixam tnerruc 100 A and
than 0.5” ni all snoitcerid morf its lamron noitisop
evoba shall eb detcennoc hguorht -redlos
ees( etoN 2 ni elbaT .)7
depmirc/gni .stekcos sreteM htiw detar mumixam
tnerruc fo 60 A yam eb detcennoc hguorht -redlos
ehT ,sretem gnivah a esac yllohw ro yllaitrap edam
depmirc/gni .stekcos
fo ,latem shall eb dedivorp htiw a evitcetorp htrae
.lanimret
6.4.3
Connection of Current Circuit Conductors to
6.3 swodniW Meter Current Terminals
The srotcudnoc fo tnerruc tiucric fo a retem shall
fI eht retem revoc is ton ,tnerapsnart eno ro erom eb detcennoc ot its tnerruc slanimret edisni eht
swodniw shall eb dedivorp rof gnidaer eht retsiger retem lanimret kcolb gnitpoda yna fo eht -mocer
and noitavresbo fo eht .rotor esehT swodniw shall dednem sdohtem nevig ni xennA C os as ot erusne
eb derevoc yb setalp fo tnerapsnart lairetam hcihw ,yrotcafsitas elbarud and etauqeda tcatnoc secafrus
tonnac eb devomer tuohtiw gnikaerb eht seals. neewteb eht srotcudnoc and eht .slanimret
6.4 slanimreT 6.4.4
Dimensions of Terminal Holes
6.4.1 Terminal Block(s) and Protective Earth The lanretni retemaid fo lanimet seloh shall eb as
Terminals deificeps ni elbaT 2.
slanimreT yam eb depuorg ni a lanimret )s(kcolb
elbaT 2 lanimreT
Holes
gnivah etauqeda insulating seitreporp and
(Clause 6.4.4)
lacinahcem ,htgnerts yeht shall timrep eht -cennoc
noit fo htob dilos and dednarts .srotcudnoc Rated IMaximum Current Internal Diameter
Min, mm
ehT seloh ni eht gnitalvsni lairetam hcihw mrof a
(;1 (2)
noitagnolorp fo eht lanimret seloh shall eb fo
Up to and including 40 5.5
tneiciffus ezis ot etadommocca eht noitalusni fo
60 8.5
eht srotcudnoc .osla 120 9.5

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