Table Of Contentइंटरनेट मानक
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Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru
“The Right to Information, The Right to Live” “Step Out From the Old to the New”
IS 1885-77 (1993): Electrotechnical Vocabulary, Part 77:
Overhead lines [ETD 1: Basic Electrotechnical Standards]
“!ा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”
IS 1886 ( Part 77 ) : 1993
IEC Pub 50 (466 ) ( 1990 )
wr?er ‘qy;r$
Indian Standard
ELECTROTECHNICALVOCABULARY
PART 77 OVERHEAD LINES
UDC 621-315-1 : 001.4
Q BIS 1993
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
yaM 1993 Price Group 8
cisaB lacinhcetortcelE Standards lanoitceS ,eettimmoC TE 01
STNETNOC
Sections Page
O-664 1 lareneG smret . . . . . . . . . . . . . . . . . . . . . 1
20-664 lacinahceM ngised . . . . . . . . . . . . . . . _. 2
.I.
30-664 Spans . . . .-- . . . .-. . . . 2
. . . . . .
40-664 seliforP . . . . . . . . . . . . . . . . . . 3
. . . . . .
466.05 rotcudnoC stnemegnarra . . . . . . . . . . . . 4
. . . . . . -se
60-664 stroppuS . . . . . . . . . . . . . . . 5
. . . . . .
70-664 seloP and stekcarb . . . ._. . . . . . . . . . 5
. . . -
80-664 srewoT . . . . . . . . . 6
. . . . . . ..C
90-664 snoitadnuoF . . . . . . . . . . . . . . . 7
. . . . . . . . .
01-664 eraB srotcudnoc . . . . . . . . . __. . . . 8
. . . ._.
11-664 rotcudnoC sgnittif . . . . . . .-. . . . . . . 9
._. . . . . . .
21-664 rotalusnI sets - seirosseccA . . . f.. . . . . . . 10
. . . . . .
xednI . . . . . . . . . 17
. . . . . . . . .
LANOITAN FOREWORD
sihT naidnI dradnatS ( traP 77 ) hcihw is lacitnedi htiw CEI buP 50 ( 466 ) ( 0991 ) lanoitanretnI‘
lacinhcetortcele yralubacov - retpahC 466 : daehrevO ,’senil issued yb eht lanoitanretnI -inhcetortcelE
lac noissimmoC ( CEI ,) was detpoda yb eht uaeruB fo naidnI Standards no eht noitadnemmocer fo
eht cisaB lacinhcetortcelE Standards lanoitceS eettimmoC and lavorppa fo eht lacinhcetortcelE
noisiviD .licnuoC
ylnO eht hsilgnE txet nevig ni eht CEI noitacilbup has neeb deniater elihw gnitpoda as naidnI
,dradnatS and as hcus eht egap srebmun nevig ereh era ton emas as ni CEI .noitacilbup
1s 1885 ( Part 77 ) : 1993
CEI ,lu’f 50 ( 466 ) ( 1990)
Indian Standard
ELECTROTECHNICALVOC&NJLARY
PART 77 OVERHEAD LINES
466-01-01 \\\iras eg~kov dna ycneuqerf dellatsni no the enms sup-
(electric) line porl.
Au tnemegnarra ,srotcudnocfo gnitalusni slairetam dna 466-01-11
seirossecca for gnirrefsnart yticirtcele neewteb owl
nwaopolar liue
stniop of .metsys
A tcerid tnerruc enil ni hcihw ylno eno elop stcennoc
20-10-664 the daol ot the ,ylppus the nruter path gnieb hguorht
daehrevo enil earth.
nA cirtcele enil whose srotcudnoc are detropus evoba 21-10-664
,duuorg srotalumi dna
gellerillly by lll~illlS of bipolar liue
etairporppa .stroppus
lccridA tnerruc enil ni hcihw the owI selop tcennoc the
N&e. niatre:C4- daehrevo senil yam os!a eh delcurtsnoc htiw
daol ot the .ylppus
conductms.
ilJSUliliCd
31-10-664
466-01-03
trunsniissiou he
a.c. line
A cuil hcihw si part of na cirtcele power noissilnsuart
A he detcennoc ot na gnitanretla tnerruc ecruos of .111e1sys
ylppus or gnitcennoc two gnitanretla tnerruc .skrowten
41-10-664
40-10-664
noitu)lirtsid line
phase (of na ax. )enil
A cuil hcihw si desu for the noitubirtsid of .yticirtcele
ehT noitlEgiScd ynafo ,rotcudnoc eldnuhro -cudnocfo
tars, of a esahpylop enil hcihw si dednetni ot xl 51-10-664
ax.
dezigrene rednu normal use. conductor (of au overhead line)
466-01-05 A eriw or noitanibmoc of seriw lm detalusni morf eno
,rehtona elbatius for gniyrrac na cirtcele .tnerruc
d.c. line
A enil detcennoc ot tcerid tnerruc ecruos of .ylppus 61-10-664
a
rotcudnoc noitarbiv
U-6.64 60-
elop (of a d.c. line) ehT cidoirep noitom of a .rotcudnoc
ehT noitangised of a ,rotcudnoc or eldnub of -cudnoc 71-10-664
tors, of a d.c. enil hcihw si dednetni ot eb dezigrene nailoea noitarbiv
rednu amron 1 .esu
ehT cidoirep noitom of a rotcudnoc decudni yb the
70-10-664 dniw yltuaninloderp ni a lacitrev ,tnalp of ylevitaler
circuit (of au dnellrevo line) ,edutilpma hgih ycneuqerf fo eht of redrothe order of the of rotcudnoc net or snet .retemaid Hz dna llams
A rotcudnoc or metsys of srotcudnoc hguorht hcihw na
cirtcele tnerruc si dednelni ol .wolf 466-01-18
sulqxui oscillatiou .
466-01-08
ehT cidoirep noitom of eno or erom srotcudnoc-bus
single circuit liue
yltnanilnoderp ni a latnoziroh ,enalp of ctaidcmretni
A enil gnisirpmoc eno .tiucric
ycneuqerf of the order of a few Hz dna edutilpma ofthc
90-10-664 order of the rotcudnoc gnicaps ni the .eldnub
double circuit line 91-10-664
cnilA gnisirpmoc ovh stiucric ton ylirassecen at the eluas rotcudnoc gnipollag
egatlov dna ycneuqerf dellatsni no the el\Ias .troppus
A cidoirep noitolu of a ,rotcudnoc or ,eldnub
j-10-664 0 yltuani~noderp ni a lacitrev enalp of wol ycneuqerf of
order of a uoitcar‘I of eno Hz dna hgih ,edutilplna
multiple circuit line the
whose uluulixaut eht emas order as the
A tnil gnisirplnoc lareves stiucric ton ylirasscccu at the WIIW cilll IX of
lanigiro sag.
1
IS 1885 ( Part 77 ) : 1YY3
IEC Pub 50 ( 446 ) ( 1990 )
SE(:ITON 466-02 -MECHANICAL DESIGN
466-02-01 90-20-664
loading imunlptions ultimate desigu load’
A set of gnidaol ,snoitidnoc guitluser morf lanoitan ehT daol hcihw lla ls~~jdluo~ts’stnemelr niatsus tuohtiw
sdradnats ro yrolulats snoitaluger ro morf a yduls ’fo ,eruliaf gnirud dei’liccps .noitarud
ilIly
lacigoloroctxn hcihw are desu for gningised each
&IUI,
tnemele of .enil 466-02-10
ii
verticid load
466-02-02
ehT lacitrev stnenopmoc of yna daol deilppa at a nevig
loading case tniop ,of the troppus ni a lanoisnemid-eerht metsys of
ehT ,noitanibmoc or set, of sdaol deilppa ot na tnemele setanidro-oc related In the support.
of a enil for a rliluCiIIlip gnidaol .noitpinussa
466-02-11
30-20-664
lougitudiual load
working loud
ehT lanidutignol stnenopmoc of ynn daol deilppa at a
ehT daol devired morf the deificeps gnidaol
;ISSUIII~- nevig tniop of the troppus ni a lanoisneinid-eerht -sys
snoil gnidulcxe ylefas or daolrevo
f;lClOrS 01‘ CilC- 1nc1 01’ setanidro-oc alcr ted ot the .troppus
rs.
to
21-20-664
466-02-04
transverse load
llorxilal load ehT esrevsnart stnenopmoc of yna daol deilppa at a
primary load nevig tniop of the troppus ni a lanoisnemid-eerht -sys
Load gnitluser morf the noitca of the dniw dna Co tcm setanidro-ocfo detaler ot the .troppus
ytivarg nn ,seriw srotalusni dna stroppus htiw or
31-20-664
tuohtiw eri .noitercca
wind load
50-20-664
ehT latnoziroh daol gnitluser morf dniw erusserp -pa
deilp OI yna tncinelc of the daehrevo ,enil htiw or
tuohtiw kc .gnidaol
Load decudorp yb the elbanosaer seitivitca
ol’c~nstr~c-
tion 21M I ccuaneluiluu ,lennosrep and/or that gnitluser 41-20-664
morf the eruliaf of cinos lnenopinoc of a .enil
ice loading
60-20-664
ehT lanoilidda daol gnitluser morf eci noitercca no yna
tneincle of the .enil
legislative load
ehT daol debircserp yb lacol or lanoitan gnitaluger Z-20-664
.seidob
uuifornl ice loadiug
70:20-664 ehT eri daol ylmrofinu detubirtsid revo the htgnel of
each rotcudnoc dna eriwhtrae no lla the of a
test daol spalls
noitces of .enil
ehT daol deilppa ot na tncmcle or stneincle of na
daehrevo tnil for gnitset .sesoprup 466-02-16
non-uuiforru ice loading
80-20-664
ehT daol eud ot nevenU eci gnidaol gnola srotcudnoc
or seriwhtrae ni a noitces of a .enil
failure load
ehT daol hcihw sesuac eruliaf ot rucco ni yna -ele Note.. sihT- yam tluser morf mrofinu-non ,noilalumucca ro
mrofinu-non tnemhcated fo eci morf eht srotcudnoc ro
.tnem
.seriwhtrae
2
IS 1885 ( Part 77 ) : 1993
IEC Pub 50 ( 466 ) ( 1990 )
SECTI’ON 466~03-SSYANS
466-03-01 l-30-664 0
spau sag
ehT trti)l of a euil neewteb two evitucesnoc stniop of ehT mulnixain lacitrev ccmtsid ni li naps of na -revo
troppus of a .rotcudnoc hed enil ncrwtxl a rotcudnoc the thgiarts enil
and
gninioj sti stniop of stroppus (see .)1.gif
466-03-02
11-30-664
spm le11gtlth
ehT latnoziroh ccuaisid ucewtcb the tneinhcallI; stniop noitces (of na daeilrevo )enil
of the rotcudnoc uo two cousecutivc supports.
A part of a cuil neewteb two noisnet .stroppus
466-03-03
466-03-12
level
span
napsA ni hcihw the lnc~nhcatla stniop chl’io rotcudnoc equivalent span
no two evitucesnoc stroppus are ylrecn ni the clnas riding
Spill1
latnoziroh .enalp A suoititcif elgnis naps ni hcihw noisnet snoitairav eud
40-30-664 ot daOl or crutareplncl segnahc arc ylraen the emas as
sloping span iii the ilClUill spilus in il section.
inched span NO/C. - ‘l‘hc ;lpproximilte eulav DIL fo eht ~nclaviuqe span is
As~;!II in hcihw the tnclllhcl;ttli stniop cht’lo rolcudnoc c;llclll;lled frolll:
uo OWI cvituccs~~or stroppus erli WI ie the same
latuoziroh .rn~;lp
50-30-664
where ai is eht h&net fo eht span i in eht .noitcx
ditt’erence in levels
ehT acilrev I ecnatsid neewtch the two latnoziroh stnalp 466-03-13
gnissap hguorht the tue~uhcl;tI~; stuiop of the rotcudnoc Menu-y
Of uli denilcni lXlS .lI ehT e)llihs of eht evruc assumed yb a yltcefrep
lle~ild~,
60-30-664 edlisiielxcui cord dediicpsus at sti ,sduc duli nevig yh
the :uoitauqe -
sloping spun length
ehT ecnatsid neewteb 111e tuc~uhel;t~Ii stniop of the
rotcudm~c uo two eviluccsuoc slroppus (see .gif 1).
nI practice, lhe dlpmis alobarap nkfo’si ,desu
70-30-664
wind spau 2X$=Y
ehT latnoziroh ccuatsid neewteb the stniop at naps-dim
011 each edis of a .lroppus hcihw slncserpcr the tsrif two smret ofthe seires -napxe
lmis of the noilliuqe of the .yrankar
80-30-664 Note. -The yranedc evruc stneserper a caldc with constant
weight per unit fo length of ,evruc white (he parabola repre-
sents 12 wire with I; constant thgiew per latnoziroh tinu of
ehT latnoziroh eclllitsid neewteb the tscwoI stniop of a .htgnel eh‘l‘ siigcalcutatcd yh thep;iri~t~otice~Uiltion issmaller
rotcudnoc no rehtie edis of li .troppus naht tallI CillCUtilled yb eht yranetac .noitauqe ro:I gnot spans
Note - ni ylpeets ,nipols $1 lerrain, eht lowest poinls fo eht or for yrev sloping spans ehI p~r:~bolic iItlproxim;\tion GilI
introduce unilcceplal+2 errors.
yramtac sevruc fo ht011 adj;lccnt ehI same
side of eht support. spans can Ix on 41-30-664
90-30-664 yruuetlsc tnatsnoc
. . . ehT tnatsnoc ni the yranetac d11li alobarap ,snoitauqe
yllacirtemoeg detneserper yb the suidar of erutavruc at
ehT acitrev 1 ecnatsid neewteb two latnoziroh ,senalp
the tsewol tniop of the .naps
eno hguorht the tsehgih tniop of troppus ofthc coudu~-
rol ni B ,IIIX~S duli the other, laitncguat ot the tsewol point Note. -The c;rtcn;lry conslant p is ectual ot ~hc tneitouq fo
fo chl rolcudnoc .evrur eht horizont;rl tension in eht conductor b7 ta I; nevig tempera-
eruL (see fig. 1) yb iIs unit weight W, which must ekaL into
eloN -‘rhis lowest poinl yam eb yrrmigtimi (see .)1.gif
account ehI ice or wind ,sdaolrevo if appti~;lt)te.
3
E
x
IS 1885 ( Part 77 ) : 1993
IEC Pub 50 ( 466 ) ( 1990 )
neewt yna evil parts dna the .dnuorg ,srotcudnoc or seldnub of euil ,srotcudnoc of tnecajda
phases.
466-05-13
61-50-664
phase-to-earth clearauce
The ntinin~um distance, under spccifieds condikm, bc-
twccn ;Iny live parts and all structures Ht earth potenhl. shieldiug augle )ASU(
ehT elgna neewteb the lacitrev enalp hguorht ehI earth
466-05-14
eriw dna enalp hguorht the earth eriw dna the -cudnoc
:I
clearance to obstacles rol ot eb protected tsniaga gninthgil strokes.
ehT umninim ,ecnatsid rednu deificeps ,snoitidnoc
bctweeu auy live parts dna yna elcatsbo at earth -netop 71-50-664
.lait
minimum angle ofshade
466-05-U minimum slrieldiug angle (USA)
ehT nihtiw hcihw the enil srotcudnoc tsum eil ni
phase-to-phase spacing angle
order ot niatbo a derised degree of noitcetorp tsniaga
ehT ecnatsid neewteb chl axes of two Necajda enil giGhgiI strokes.
NOITCES M-664 - STHOPPJIS
10-60-664 A troppus ot hcihw the srotcudnoc or seldnub are
dehcalla hguorht noisnet rotalusni sets.
support
Note ehT- sdaol eud ot eht tnecajda snaps era deredisnoc
structure (of au overhead line)
sa gnieb deilppa yltnednepedni ot eht tnemhcatta .stniop
ecivedA dengised ot ,yrrac hguorht ,srotalusni a set of
srotcudnoc of a .,enil 466-06-06
20-60-664 terminal support
etaidemretni troppus A troppus dengised ot elanimet the euil noisnet of
srotcudnoc no eno .edis
tnegnat troppus (d.eprecated)
70-60-664
troppusA detacol no na yllaitnesse thgiarts enil noitrop
of na daehrevo enil ,etuor where the srotcudnoc are transposition sapport
attached yb ,noimepsus nip or enil post .srotalusni A support dengised ot timrep the egnahc of the evitaler
noitisop of the phases the etuor of a .enil
30-60-664 along
angle troppus 80-60-664
troppusA detacol at a tniop where the etuor of ehI ,enil stay
ni the latnoziroh ,enalp segnahc yllaitnatsbus ni dircc-
PY (USA)
tion. A leets eriw rope or rod, gnikrow rednu ,noisnet con-
a tniop of a troppus ot a separatd ,rohcna or
466-06-04 necbng
gnitcennoc two stniop of the .stroppus
tlying augle support
running angle support 90-60-664
Asupport desu no llams or ntuidem selgna of noitaived stayed support
of the ,etuor the srolcuduoc gnieb attached yb -nepsus
guyed support (USA)
epyt-nois rotalusni sets.
A troppus whose ytilibats si derusne yb .syats
466-06-W 01-60-664
tensiou support
self-supporting support
angle support
A support having intrirkc stability, with&t the use of
strain support )ASU(
stays.
5
