Voltan Tinggi

7/17/2019 Voltan Tinggi

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PEMASANGAN VOLTAN TINGGI 11KV

1.0 H.T / L.V Comparison

1. Difference in tariff

2. Cable linkage3. Size of cable4. Load can be added easily

2.0 TNB R!"irmn#

11 kV - 1.5MV3.3!22 kV - 5MV"" kV - 2#MV

$.0 %a"&# &'&

$a%lt le&el at 'ain board 31MV at 11 kV

"5#MV at 22 kV

35#MV at 11 kV - 13( )bar%*12#MV at 11 kV - 1+( )la'a*

,f 35# 1#" 1+.4 k√3 11/###

$ied 0ortion

ated &oltage - 12 kV

Contin%o%s nor'al c%rrent "3#

Sort circ%it rating 1+4 r's at 11(V

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(.0 CIRC)IT BREAKER

,s a 'ecanical sitcing de&ice able to 'ake/ carry and interr%0t c%rrent in acirc%it %nder nor'al condition and to carry for a s0ecified ti'e and to 'ake and

interr%0t c%rrent arising in a circ%it %nder defined abnor'al condition.*.0 CIRC)IT BREAKER PARAMETERS

a. ated nor'al c%rrent )* b. Making c%rrent ! ca0acity )*c. reaking c%rrent )(*d. reaking ca0acity )(*e. Sort ti'e itstand c%rrent )(*f. ated &oltage )(V*g. 60ening ti'e )'s* '%la b%ka ingga arka abis/ se0at%tnya lebi ce0at

dari closing ti'e. Closing ti'e )'s*

+.0 BREAK,O-N VOLTAGE

a. 7dara - 2# kV #.5 c' )5'' s0ark ga0*

b. 8a'0agas - 15# kV #.5 c' )5'' s0ark ga0*

2



6C g%na earting tr%ck

Voltage transfor'er s0o%t 0erl% 9%ga diasingkan

11(V 0anel 'ai'%' 1: bilangan sebaris

Safety clearance +; "<

=ork clearance 3; for 11 kV

4; for 11 kV to 33 kV

3



PENCA-ANG PEMBAHAGIAN )TAMA PP)

M7 ing Main 7nit )7nit >egelang 7ta'a*6$$ ?6,@A Aitik %ka?engasingan Secara Sectionilising

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.0 Ai#iona& V#or

12.B(V - sefasa".35(V - tidak sefasa

3.0 S"4#ra#iona& V#or

# (V - sefasa11(V - tidak sefasa

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5.0 S)BSTATION EARTHING

11 kV s%bstation - earting k%rang 3 o'

33 kV s%bstation - earting k%rang 2 o'132 kV s%bstation - earting k%rang 1 o'

$or 33 kV %se earting grid/ earting 'at or earting 0late

5.1 PEMB)MIAN/GRO)N,ING/EARTHING

a. Syste' earting b. %i0'ent earting

Disa'b%ng ke0ada 9isi' a' b%'i dengan berkesan )effecti&ely eart* s%0aya 0eranti 0erlind%ngan bole berkendali.

$or ire gro%nded syste'

a. >ro%nd 0otential

V> ,$ $

>rid 0otential rise )>?*

b. ?ass fa%lt c%rrent to ne%tralc. &oid ter'al E 'ecanical da'aged. 60eration of 0rotecti&e e%i0'ent incl%ding s%rge 0rotection

"



elay action

,C a00roac

t < #.2 second/ VA "##V

#.2 < t < 2 second/ VA 12#!t &olt

t > 2 second/ VA > "# &olt

Vto%c )1.5 ro F 1###* #.15B &olt √ t

Vste0 )" ro F 1###* #.15B &olt √ t

lectric arc te'0erat%re is %0 to +/### 1#/### deg. C

Differential ?rotection ?rotected zone ! 7nit 0rotection

Li%id esistor

@e%tral arting esistor

?ilot ire 0rotectionMerz 0rice - &oltan teti'bang

ar%s 'engeliling )Solkor ! f */ 33 kV

B



D - differential relay$ - restricted eart fa%ltS$ - standby eart fa%lt%lcolf relay6il te'0erat%re tri0 )6AA*6il te'0erat%re alar' )6A*=inding te'0erat%re tri0 )=AA*=inding te'0erat%re alar' )=A*

6AA E =AA - +#G to :5G6A E =A - 1##G to 1#5G

+



7ndergro%nd Cable - Aranslay 11(V F ,DMA 6!C E !$

Solkor / f 33(V6&eread lines ,DMA 6!C E !$

Rs#ri# Ear#6 %a"&# RE%

De&ice Carry $a%ltC%rrent

Make on $a%lt reak LoadC%rrent

reak $a%ltC%rrent

,solator

)disconnector*

Hes @o @o @o

Sitc Hes Hes Hes @o

Circ%itreaker

Hes Hes Hes Hes

$!S/ S!$ HesI Hes Hes Hes

• %ntil f%se blo

reaking ca0acity - 25 k

Making - 1.+ √ 2 25 k "3." k

ated sort ti'e - 21.: k for 3 saat

ated o0erating d%ty - 3 'in%te in MV or k

:



10.0TRANS%ORMER

Aa0 Canger

6$$ load ta0 canger

6@ load ta0 canger

Aa0 canger is at 0ri'ary inding

Aere are 5 0ositionJ

Aa0 1 - 11/55#V

Aa0 2 - 11/2B5VAa0 3 - 11/###V 433V

Aa0 4 - 1#/B25V

Aa0 5 - 1#/45#V

Vector >ro%0

DH11/ DH1/ Hy1/ Ky11

6%t0%t side lag by 3#G or lead by 3#G

1#



11.0MENG)7I ALAT)BAH

1. intangan 0enebatan2. (eter%san

3. Aekanan )8A side*4. A%rn ratio5. ?oer factor test". 6il test

?enebatan ), test*

angeJ 1###V

coil ke b%'i - Mo'

coil ke b%'i - Mo'

C coil C ke b%'i - Mo'

acaan 1##Mo' keatas diangga0 baik

(eter%san

angeJ 0aling renda

ke - # o'

ke C - # o'

C ke - # o'

Ba6a8ian Vo&#an Rna6

a. intangan 0enebatan/ range 5##V

a ke b%'i J

b ke b%'i J 1##Mo' keatas

c ke b%'i J

n ke b%'i J

b. (eter%san/ range 0aling renda

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a ke b J

b ke c J

c ke a Ja ke n J

b ke n J

c ke n J

79ian nisba )ta0 0ada ked%d%kan 3*

12



12.0 )7IAN MIN9AK

S 5B+4 ! ,C 15"

MinyakJ S 14+?enebatan %nt%k solid/ flas o&er di-electric is for li%id/ s0ark o&er

OL, - S0ere B'' dia'eter/ distance 4''

NE- - S0ere 12.5'' radi%s/ distance 2.5''

Aest 3# kV for 1 'in%te. =at is te breakdon &oltage

'bil 'inyak dari baagian baa transfor'er ata% conser&ator tank

eat 1# 'init

@aikkan (V seingga flas o&er

1. 79ian 0erta'a J 3# kV/ reat 5 'init

2. 79ian ked%a J 25 kV/ reat 5 'init

3. 79ian ketiga J 35 kV/ reat 5 'init

4. 79ian kee'0at 5# kV/ reat 5 'init

5. 79ian keli'a J 3# kV/ reat 5 'init

". 79ian keena' J 2B kV/ reat 5 'init

1:B kV baagi " 32.+ kV

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Silica gel )cobalt cloride*

Aest 'inyak tia0-tia0 ta%n

sid test

1.#'g ! g ?ottasi%' 8ydroide )(68*

#.5'g ! g ceck again after 4 'ont

Strea'-line filter for filtering oil ito%t de-energised te transfor'er

Loading

Load transfor'er %0 to +#G taking into acco%nt load only %0 to 5#G

Largest transfor'er is "#MV

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1$. PRESS)RE TEST

nyting contain ind%ctor or ca0acitor s%c as transfor'er or cable or 'otor '%st be tested %sing DC. 6nly b%sbar/ breaker or M7 are s%itable for C 0ress%retest.

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1(. PENG)7IAN SISTEM PEMB)MIAN PENCA-ANG

Soil resisti&ity test cond%cted if 0ossibleJ

11(V s%s-station 3 o'

33(V s%b-station 1 o'

?oer station #.5 o'

art lectrode Aesting

?otentio'eter 0rinci0le/ based on to &al%es

C ?otential C C%rrent

V!,

1"



1*. )7IAN TEKANAN

,t is a 0re-co''issioning test or after fa%lt as been re0aired. Aest ins%lationand contin%ity first before 0ress%re test. Ae 0%r0ose of te 0ress%re test isJ

- Ao ens%re e%i0'ent is able to itstand te no'inal or syste' o0erating&oltage

@or'ally done at tice te syste' &oltage as a g%ideJ

Standard is 2 rated &oltage F 2

%i0'ent to be tested are 7S/ A@S$6MM S=,AC8>/CL

Aest d%ration

1 'in%te C at any fre%ency/ 15 'in%tes DCC test only for b%sbar and sitcgear DC test only for transfor'ers and cables beca%se of 0resent of ind%ctance andca0acitance

$or old e%i0'ent te test &oltage 'ay be red%ced b%t te ti'e as to belonger )15 'in%tes*

,f te cable or transfor'er is already connected and not 0ossible to bese0arated DC test can be a00lied

eteen 0ases 34kV for 15 'in%teseteen all 0ases and eart 25kV for 15 'in%tes

Screen cable does not 0er'it 0ase to 0ase test beca%se te screen is eart.Screen is to 'ake te &oltage le&el e&en tro%go%t te ins%lation of tecable. Most 22kV and abo&e cables as to be screened oterise teins%lation tickness is &ery '%c ticker.

@oteJ ll ter'inal not %nder test '%st be effecti&ely eart.

1+. )7IAN TEKANAN KABEL

$or 11 kV cable

25 kV DC 15 'in%tes

1B



C 1 'in%te )destr%cting test*

eteen 0ases and eart

$ail conditionsJ

1. Ae kV co%ld not go iger to 25 kV

2. Ae kV raise and ten dro0

3. Ae leakage is &ery ig

1+



1*.1 )7IAN TEKANAN VAC))M CIRC)IT BREAKER

Ao ceck te integrity of te &ac%%' in te interr%0ter 7se VC77M C8C( )0ress%re test set* so green and red

,f &ac%%' cecker is not a&ailable 0ress%re test can be %sedCeck te lengt of te break are all te sa'e )contact ga0*,f te &oltage cannot go$or 11(V breaker/ test at 4# kV DC for 15 'in%tes or 25kV C for 1 'in%te

1:



1*.2 )7IAN TEKANAN OIL CIRC)IT BREAKER

$irst testJ

Aest all ter'inal to te fra'e!body. Ae breaker 6@ 0osition. Ceck te leakagec%rrent and taken for f%t%re reference.

Second testJ

Ao test beteen 0ases. Circ%it breaker 6@ 0osition

Aird testJ

- Aest beteen ,@ and 67A- Circ%it breaker 6$$ 0osition- Ao 'ake s%re te ga0 can itstand test &oltage

2#



C - 1 'in%te

11 kV 24 kV )2 ti'es rated &oltage F 2* )2 11 kV F 2* 24 kV

1. 79i se'%a 0%nca ke fra'e 6C/ 6@ 0osition

2. ntara fasa

reaker 6@ 0osition

3. ntara NMS7(; dan N(L7;/ 6$$ 0osition

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PROTECTION

7nit ?rotection

Ae relay only orks on te different &al%es in a c%rrent 0at

Ay0es of elays1. ttracted ar'at%re relays )'o&able ar'at%re*2. ,nd%ction relays ),DMA*3. Aer'al relays )bi-'etallic conce0t*4. Mecanical relays )0ress%re sitc/ li%id le&el/ te'0erat%re le&el*5. Solid state relays

DC sce'e a&ailableJ 3#V DC/ 22#V DC/11#!22#V DC

22



ase 0oerJ 1### kV

KG J 4.B5G

$a%lt le&el on MS 1 MV 21.#5 MV #.#4B5

?ros0ecti&e 3 0ase sort circ%it c%rrent $a%lt le&el 21.#5 1#"

O3 415 O3 415

3# k

$%ll load c%rrent 1 1#" 14## O3 415

• Ae C or MCC %sed '%st a&e tri0 rating e%al or greater tan 14##and sort circ%it breaking ca0acity e%al or greater tan 3#k

•Ae MS '%st a&e rated sort circ%it c%rrent e%al or greater tan 3#k for3 seconds

• ated 'aking ca0acity of te 'ain sitcboard and b%sbar s%00ort

1.5 O2 3#k "3."3k )0eak*

1.5 is factor for f%se or circ%it breaker

23



O2 is con&ersion MS to 0eak

E:amp& 2

K G 5G$a%lt le&el on MS 12.5 1#" 25MV

#.#5

?ros0ecti&e 3 0ase sort circ%it c%rrent 25MV 35 k O3 415

$%ll load c%rrent 12.5 1#" 25## 2.5 k O3 4##

Voltage dro0 consideration

- ca%sed by large starting c%rrent of 'acine/ ea&y ind%stries

Voltage dro0 Start kV of 'otor G i'0edance ated kV of transfor'er

E:amp&

5## kV transfor'er s%00lying to a 5##.0/ 4##V 'otor o%ld a&e esti'atedtransient &oltage di0 d%ring starting. Ae &al%e of transfor'er reactance is 5.4 0.%

Calc%late te &al%e of te &oltage di0 in te syste'

(V of te 'otor 5## B4" 43+ kV/ ro%nd figre 5##kV #.+5

24



ss%'ing starting c%rrentJ 4 ti'es

Voltage di0 4 5## 5.4G 21."G5##

cce0table &al%e is less tan 15G

,t is ad&isable tat if a transfor'er is s%00lying to a 'acine load it igstarting c%rrent it need to be genero%sly o&ersized to at least 2 ti'es te rated kVof te 'agnit%de of te &oltage di0. =e can also %se .C dri&e as alternati&e.

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Voltan Tinggi