02 Mv Switchgear- Introduction

7/24/2019 02 Mv Switchgear- Introduction

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PROVIDING ENGINEERING FOR OPERATION TRAINING

MV SWITCHGEAR WITH SEPAM RELAY AND POWERQUALITY DISTURBANCES

MV SWITCHGEAR- Introduction


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Schneider Electric 2- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt

PROVIDING ENGINEERING FOR OPERATION TRAINING MV SWITCHGEAR

WITH SEPAM RELAY AND POWER QUALITY DISTURBANCES

MV SWITCHGEAR- IntroductonB!"c #!$ntud% to d%&n% ! MV S'tc($%!r

Volt!"eCurrentFre)uenc*Short-circuit o+er,

The volt!"e. the r!ted current !nd the r!ted #re)uenc* !re o#ten /no+n or c!ne!sil* 0e de#ined,

1no+in" the volt!"e /V3 +ill !llo+ us to de#ine the dielectric +ithst!nd o# theco&onents,

1no+in" the short-circuit o+er o# the net+or/ !llo+s us to choose thev!rious !rts o# ! s+itch0o!rd +hich &ust +ithst!nd si"ni#ic!nt te&er!ture rises!nd electrod*n!&ic constr!ints,


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VOLTAGE)O*%r!tn$+"%r,c% Vot!$% U ./V0)

Volt!"e !cross the e)ui&ent ter&in!ls, E5!&le 6 22/V. 4,4/V.7R!t%d Vot!$% Ur ./V0)

M!5 r&s root &e!n s)u!re3 v!lue o# the volt!"e th!t e)ui&ent c!n

+ithst!nd under nor&!l oer!tin" conditions, E5!&le 6 28/V. 9,2/V.7 The r!ted volt!"e :r3 is !l+!*s "re!ter th!n the oer!tin" volt!"e, The r!ted volt!"e !ssoci!ted +ith !n insul!tion level,

In"u!ton %,% Ud ./V r#"1 2 #nut%0 !nd U* ./V *%!/0)

This de#ines the electric +ithst!nd o# e)ui&ent to s+itchin" under oer!tion overvolt!"es !nd li"htnin" i&ulse,


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VOLTAGE)Ud) Over volt!"e due to o# intern!l s+itch"e!r . +hich !cco&!n* !ll ch!n"es in

the circuit6 oenin";closin" C< or S+itch. 0re!/do+n or shortin" !cross !ninsul!tor. etc7 Si&ul!ted in l!0or!tor* 0* the o+er-#re)uenc* +ithst!nd volt!"e #or =

&inute,U*)over volt!"e o# e5tern!l s+itch"e!r or !t&osheric ori"in occur +henli"htnin" #!lls on or ne!r ! tr!ns&ission line, Si&ul!ted in l!0or!tor* 0* the li"htnin" i&ulse +ithst!nd volt!"e,


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Schneider Electric >- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt




VOLTAGE)St!nd!rd")

A!rt #ro& seci!l c!ses. Schneider Electric e)ui&ent !re co&li!nt +itht!0les =! !nd =0 o# IEC st!nd!rd ?229=-= co&&on seci#ic!tions,

Insul!tion level !l* to MV s+"r !t !ltitudes o# less th!n =@@@ &etres.

2@C. == ";&4 hu&idit* !nd ! ressure o# =@=,4 /(!, E!ch insul!tion level corresonds to ! dist!nce in !ir +hich "u!r!nteese)ui&ent +ithst!nd +ithout ! test certi#ic!te,

For other conditions. correction #!ctors !re !lied #or the test !nd in so&ec!ses. der!tin" h!s to 0e considered,


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Schneider Electric ?- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt




VOLTAGE)IEC "t!nd!rd"%d ,ot!$%" )


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CURRENT)R!t%d nor#! curr%nt) Ir.A0)

This is the r&s v!lue o# current th!t e)ui&ent c!n +ithst!nd +hener&!nentl* closed. +ithout e5ceedin" the te&er!ture rise !llo+ed inst!nd!rds,


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CURRENT)R!t%d "(ort-t#% 't("t!nd curr%nt1 I/.A0)

This is the r&s v!lue o# the current +hich the s+itch"e!r c!n c!rr* in theclosed osition durin" ! seci#ied short ti&e, Short ti&e is "ener!ll* = s. !ndso&eti&es 4 s,

O*%r!tn$ curr%nt1 I .A0) C!lcul!te #ro& the consu&tion o# the devices connected, Actu!l current !sses throu"h the e)ui&ent,

o "ener!ll* custo&er rovide its v!lueo c!lcul!te i# +e /no+ the o+er o# the lo!d


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SHORT CIRCUIT CURRENT)S(ort crcut *o'%r d%*%nd" on)

$et+or/ con#i"ur!tion e56 sin"le source. !r!llel source.net+or/."ener!tors3,

I&ed!nce o# e!ch e)ui&ents or devices,e56 lines. c!0les. tr!ns#or&ers.

&otors3,It is the &!5i&u& o+er th!t the net+or/ c!n rovide to !n inst!ll!tion durin" !#!ult. e5ressed in MVA or in /A r &s #or ! "iven oer!tin" volt!"e U Oer!tin" volt!"e /V3 I"c Short-circuit current /A r &s3


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SHORT CIRCUIT CURRENT)Mn#u# "(ort-crcut curr%nt1 I"c ./A r#"30)E5!&le6 Isc6 2>/A r&s

This corresonds to ! short-circuit !t one end o# the rotected lin/ !nd notust 0ehind the 0re!/in" device, Its v!lue !llo+s us to choose the settin" o# thresholds #or overcurrent

rotection rel!*s !nd #uses,M!4#u# "(ort-crcut curr%nt1 It(./A r#"+ 2" or 5"0)E5!&le6 Isc6 4=,> /Ar&s;=s This corresonds to ! short-circuit in the i&&edi!te vicinit* o# the

do+nstre!& ter&in!ls o# the s+itchin" device It is used to de#ine the ther&!l +ithst!nd o# the e)ui&ent,


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Schneider Electric ==- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt




SHORT CIRCUIT CURRENT)P%!/ ,!u% o& t(% #!4#u# "(ort-crcut curr%nt) Id6n7 ./A *%!/0

v!lue o# the initi!l e!/ in the tr!nsient eriod Id*nis e)u!l to6

o 2,> Isc!t >@ H IEC3 !nd 8> &s DC ti&e-const!nt oro 2,? Isc!t ?@ H IEC3 !nd 8> &s DC ti&e-const!nt or

o 2,9 IscIEC3 #or hi"her DC ti&e-const!nts, It deter&ines the 0re!/in" c!!cit* !nd closin" c!!cit* o# circuit 0re!/ers !nd s+itches. !s +ell

!s the electrod*n!&ic +ithst!nd o# 0us0!rs !nd s+itch"e!r, IEC uses the #ollo+in" v!lues6

8 - 293: - 2; - 9< - 9: - 523: - =< - :< /A r#"3


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Schneider Electric =2- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt




FREQUENCY .H>0)T'o &r%?u%nc6 !r% u"u!6 u"%d t(rou$(out t(% 'ord

>@ H in Euroe ?@ H in the :SA sever!l countries use 0oth #re)uencies indiscri&in!tel*

Instru&ent Volt!"e Tr!ns#or&er r!ted >@ c!n oer!te !t ?@H Instru&ent Current Tr!ns#or&er r!ted >@ c!n oer!te !t ?@H @H,


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PROTECTION INDE@ .IP0)(rotection o# eole !"!inst direct cont!ct !nd rotection o# e)ui&ent !"!inst

cert!in e5tern!l in#luences,Re)uested 0* intern!tion!l st!nd!rd #or electric!l inst!ll!tions !nd roducts IEC

?@ >23,

The rotection inde5 is the level o# rotection rovided 0* !n enclosure !"!inst!ccess to h!!rdous !rts. enetr!tion o# solid #orei"n 0odies !nd o# +!ter,The I( code is ! codin" s*ste& to indic!te the rotection inde5,


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PROTECTION INDE@ .IP0)

2"tnu#%r

@ $o rotection

= (rotection !"!inst o0ects >@ &&

2 (rotection !"!inst o0ects =2,> &&

4 (rotection !"!inst o0ects 2,> &&

8 (rotection !"!inst solid o0ects = &&

> (rotection !"!inst dust. li&ited intrusion !ccet!0le in !ll directions

? Tot!l rotection !"!inst dust


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Schneider Electric =>- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt




PROTECTION INDE@ .IP0)

9ndnu#%r

@ $o rotection

= (rotection !"!inst vertic!ll* #!llin" +!ter dros

2 (rotection !"!inst r!in dros #!llin" !t &!5, => !n"le

4 (rotection !"!inst r!in dros #!llin" !t &!5, ?@ !n"le

8 (rotection !"!inst r!in dros #!llin" #ro& !ll directions

> (rotection !"!inst lo+ ressure srue +!ter #ro& !ll directions

? (rotection !"!inst et +!ter under ressure9 (rotection !"!inst +!ter intrusion under su0&ersion !t => c& to = &

deth. @,> hour

B (rotection !"!inst +!ter intrusion under lon" ter& su0&ersion underressure


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Schneider Electric =?- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt



MV SWITCHGEAR- IntroductonMV S'tc($%!r- G%n%r!

Electric!l net+or/ c!n 0e isol!ted. rotected !nd controlled 0* usin" !SWITCHGEARThe ter& s+itch"e!r is ! "eneric one, It is !lied to !!r!tus +ith

&ech!nic!l cont!cts +ith their !ssoci!ted &e!sure&ent. rotection !nd controldevices,(ossi0le technolo"ies6

AIS Air Insul!ted S+itch"e!r3 GIS G!s Insul!ted S+itch"e!r3


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S+itch"e!r Function


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Schneider Electric =B- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt




Met!l-enclosed s+itch"e!rs !re su0divided in 4 di##erentt*es. deendin" IEC ?@2B


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Schneider Electric =- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt




Met!l-enclosed s+itch"e!rs 0* IEC ?229=-2@@6 &!or ch!n"es,=, (!rtitionin"

The &!nu#!cturer de#ines the nu&0er !nd content o# co&!rt&ents,E!ch co&!rt&ent is descri0ed !s #i5ed or +ithdr!+!0le !nd !ccessi0ilit*,


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Schneider Electric 2@- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt




Met!l-enclosed s+itch"e!rs 0* IEC ?229=-2@@6 &!or ch!n"es,2, Descrition o# desi"n !nd #unctions

is 0!sed on #unction!lit* r!ther th!n on desi"n !nd construction #e!tures,


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Schneider Electric 2=- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt




Met!l-enclosed s+itch"e!rs 0* IEC ?229=-2@@6 &!or ch!n"es,4, %SC cl!sses loss o# service continuit*3

the &!in custo&er v!lue is the continuit* o# service rovided 0* the s+itch"e!runder conditions +hen !n !ccessi0le co&!rt&ent is oen,

S'tc($%!r c!t%$or%" 't( r%$!rd to t(% -o"" o& "%r,c%contnut6 '(%n o*%nn$ !cc%""A-% co#*!rt#%nt"

.ot(%r t(!n Au"A!r1 n "n$-% Au"A!r d%"$n"0

F%!tur%"

%SC= Other #unction!l units or so&e o# the& sh!ll 0e disconnected

%SC2A Other #unction!l units c!n 0eener"iFed%SC2

%SC2< Other #unction!l units !nd !ll c!0leco&!rt&ents c!n 0e ener"iFed


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Met!l-enclosed s+itch"e!rs 0* IEC ?229=-2@@6 &!or ch!n"es,8, (!rtitionin" cl!sses n!ture o# 0!rrier3

0et+een live !rts !nd oened !ccessi0le co&!rt&ent,

S'tc($%!r c-!""&c!ton 't( r%$!rd to t(% n!tur% o& t(%

A!rr%r A%t'%%n -,% *!rt" !nd o*%n%d !cc%""A-% co#*!rt#%nt

F%!tur%"

(M Met!llic shutters !nd !rtition0et+een live !rts !nd oenco&!rt&ent ' 2&et!l-enclosedcondition &!int!ined3

(I Insul!tion-covered discontinuit* inthe &et!llic !rtitions;shutters0et+een live !rts !nd oenco&!rt&ent

S'tc($%!r c-!""&c!ton 't( r%$!rd to #%c(!nc!-1 %-%ctrc!-

!nd &r% (!>!rd" n c!"% o& nt%rn!- !rc durn$ nor#!-

o*%r!ton

F%!tur%"

IAC $o eDection o# !rts. no i"nition o# cloths. enclosure re&!ins e!rthed


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Met!l-enclosed s+itch"e!rs 0* IEC ?229=-2@@6 &!or ch!n"es,>, Intern!l Arc Cl!ssi#ic!tion "u!r!ntee

Cl!ss IAC AF%Cl!ss IAC; AF%R

The not!tion IAC A F%R. I !nd t cont!ins the !00revi!tions #or the

#ollo+in" v!lues6

IAC Intern!l Arc Cl!ssi#ic!tion

ADist!nce 0et+een the indic!tors 4@@&&. i,e, Jnst!ll!tionin roo&s +ith !ccess #or !uthoried ersonnel. closedelectric!lservice loc!tion

FLRAccess #ro& #ront F3. #ro& the sides %Kl!ter!l3 !nd #ro&the re!r R3

I Test current K r!ted short circuit 0re!/in" current in /A3

t Intern!l !rc dur!tion in seconds3


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Met!l-enclosed s+itch"e!rs6 IEC ?229=-2@@ vs IEC ?@2B,

LSC9B

LSC9ALSC2



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Schneider Electric 2>- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt





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Schneider Electric 2?- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt




Current Tr!ns#or&er6 ost-t*e. suort-t*e or toroid!l CTs #or &e!sure&ent L rotection

Dont leave a CT in open circuit because dangerous voltages for people and

equipment may appear across its terminal



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%(CT6A &!"netic sensor +ith inte"r!ted shuntIt rovides ! volt!"e outut Vs3 +hich

reresents the ri&!r* currentA ne+ technolo"* l!unched in 2@@2Wide oer!tin" r!n"es

2 #unctions6 &e!sure&ent A$D rotectionCo&!ct devices. lu""ed directl* into the

rotection rel!*Co&rehensive rotection solution e,",

Se!& %(CT rotection s*ste&3

Accur!c* "u!r!nteed u to the short-ti&ecircuit current$o d!n"er in the event o# !ccident!l oenin"

o# the second!r* circuit



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Schneider Electric 2B- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt




Volt!"e tr!ns#or&ers 6 h!se-h!se. h!se-"round,

Dont short circuit the secondary of VTs.



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(rotectionOvercurrent overlo!d. short circuit.73Over volt!"e$e"!tive se)uenceDi##erenti!lDirection!l7,,

Monitorin" !nd &eterin":. I. (. N. S. #. t7W!ve c!tureRe&ote ; loc!l indic!tion,



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MV SWITCHGEAR- IntroductonE%ctrc! N%t'or/ O,%r,%'



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MV SWITCHGEAR- IntroductonT6*c! V%tn!# TD n%t'or/

(ri&!r*su0st!tion

Second!r*su0st!tion



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MV SWITCHGEAR- IntroductonSc(n%d%r" O&&%r- MV D"truton N%t'or/- O,%r (%!d 2+9



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MV SWITCHGEAR- IntroductonSc(n%d%r" O&&%r- MV D"truton N%t'or/- O,%r (%!d 9+9



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MV SWITCHGEAR- IntroductonSc(n%d%r" O&&%r- MV D"truton N%t'or/- Und%r $round 2+9



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Schneider Electric 4>- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt



MV SWITCHGEAR- IntroductonSc(n%d%r" O&&%r- MV D"truton N%t'or/- Und%r $round 9+9



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Schneider Electric 4?- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt



MV SWITCHGEAR- IntroductonSc(n%d%r" O&&%r- Proc%"" Indu"tr6 N%t'or/ 2+5



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Schneider Electric 4B- Field Services Division Oer!tion tr!inin" #or electric!l en"ineer - $EST%E Viet n!& ' Tri An (l!nt






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MV SWITCHGEAR- IntroductonSc(n%d%r" O&&%r- In&r!"tructur% N%t'or/ 2+5



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02 Mv Switchgear- Introduction

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