NAME – POWER FACTOR CAPACITOR BANK (33KV AND 6.
6KV)
Voltage Level – 33 & 6.6 KV
Purpose- To maintain system Power Factor.
B Safety during power factor Capacitor bank (33kv and 6.6kv) maintenance.
(33kv vkSj 6.6kv)
1.0 ikWoj QWDVj dWisfl Vj cWd ds esaVsual ds nkSjku
lqj{kk A
Take Clearance & Permit To Work (PTW) from department before switching
2.0
OFF the breaker.
lIyk;j can djus ls igys ijehV ysuk A
Maintenance should start only after complete physical isolation of power
factor capacitor bank.
dWisfl Vj cWd lIykbZ vkWQ ds ckn dh dk;Z ‘kq:
fdth,s A
3.0 Tool box talk for equipment & operational safety shall be done before start
working.
4.0
midj.k vkSj ifjpkyu lqj{kk ds fy, Vwy ckWDl VkWd
j[kj[kko ls igys fd;k tk,xk A
Ensure use of PPE’s as illustrated in picture
fp= es fpf=r ihihbZ ds mi;ksx dks lqfuf’pr djsa A
Hand gloves Discharge
rod
Electrical Safety
Safety Shoes Helmet
SOP for power factor capacitor bank (33kv and 6.6kv)
maintenance.
Department - SOP. No-
Workstation- Revision No-
Date –
Sr. No Activity Photo Corrective Action in
case not in prescribed
range
v- Ø- vWDVhfoVh Nk;kfp= fu/kkZfjr lhek
esa ug ha ds
ekeys esa
lq/kkjkRed
dkjZokbZ A
Step Description -
Pkj.k fooj.k &
1 Take permit to work &
put the copies on
respective switchgear.
dke djus ds fy,s
ijfeV fyth,s
,saM dkWih
ihlis dke djuk
ml fLop xs;j ij
yxkbZ;s A
2 Trip the breaker by If breaker is not tripping
operating E/F relay from relay then check relay
manually. circuit and breaker tripping
coil. If faulty replace relay.
vFkZ IykWV
fjys ls czsdj ;fn czsdj Vªhi uk
Vªhi djk;s A gks rks fjys ;k
lfdZV dks psd
fdth,s A
3 Rack out the breakers in
isolate position .
Ckzsdj dks jWd
vkWmV djds
vk;lksysV
daMh’ku es ys
A
Do’s Don’ts-
D;k djs A D;k uk djs A
Hold handle in straight Don’t stop operation until
position while rack breaker “Test”/Service
IN/OUT operation. indication glows.
gaWMy dks Tc rd czsdj vanj
lh/kk ,d ykbZu uk tk;s rc rd
es idMs A vkWijsV uk djsa
A
Special Tools and Breaker Rack IN/OUT
Tackles, if any - - Handle,
fo’ks”k midj.k czsdj jSd bu@vkV
gWUMy
4 Open the isolator cum If switch is not operating
earth switch easily then lubricate moving
parts.
vkblksYksV vxj fLop vkjke ls
vFkZ Lohp dks vkWijsV ugh
[kksfy;s A gksrh rks
eqOghax ikVZ
dks yqcjhds’ku
fdth,s A
Do’s Don’ts-
D;k djs A D;k uk djs A
Always use safety hand Do not try to open the
gloves during operating isolator switch if breaker is
isolator switch. not switched OFF.
vFkZ Lohp Ckzsdj Lohp
vkWijs’ku ds vkWQ ugh gS rks
nkSjku ls¶Vh czsdj dks vkWQ
gkr eksts er fdth,s A
bLrseky fdth,s
A
5 Discharged the cable &
capacitor bank by
discharging rod
Dscy vkSj
dkWiWflVj cWd
dks fMlpktZ
fdth,s A
Special Tools and Discharge Rod
Tackles, if any - - fMLpktZ jkWM
fo’ks”k midj.k
6 Check Insulation
Resistance (IR) value of
HT cable (Phase-Phase)
& (Phase-Earth) and
capacitor bank (Phase-
Earth). Check IR value of
reactor with PF bank by
removing RVT neutral
link.
Special Tools and 2.5KV Megger
Tackles, if any - - 2.5 KV esxj
fo’ks”k midj.k
7 Check fuses for tightness If fuses are loose/open then
and all link-bus tight properly with link.
connections.
¶;qt dusD’ku ywt
¶;qt ds gS rks VkbV
dusD’ku dk fdth,s A
VkbVusl psd
fdth,s A
8 Check capacitance of
(Phase-Neutral) & If capacitance value not
(Phase-Phase) of total balances then check
capacitor bank. (Keep individual capacitor for
isolator at middle termination looseness or
position ie. neither ON faulty capacitor.
nor OFF). If loose connections then
clean & re-tight or replace
dWiWlhVj cWd capacitor if faulty.
dk Qsl U;qVªy
;fn dWiWflVj
Qsl Vw Qsl
cWysal gS rks
dWiWflVUl psd
,d ,s dWiWflVj
fdth,s A
psd fdth,s vxj
dusD’ku ywt gS
rks lkQ fdth,s
A ;k dWiWlhVj
fjIysl fdth,s A
Special Tools and Capacitance Meter
Tackles, if any - - daWisflVj feVj
fo’ks”k midj.k
9 Arrest if any oil leakage
Check oil leakage if any ( observed
only for oil type series
reactor) vxj vkWby fydst
Rksy dk fydst ( gS rks vjsLV
jh;WDVj ls ) psd fdth,s A
fdth,s A
10 Check capacitor for any Arrest if any oil leakage
oil leakage. observed or replace
capacitor.
dWiWlhVj dk
rsy fydst psd vxj vkbZy fydst
fdth,s A gS rks vjsLV
fdth,s ;k
dWiWflVj dks
fjIysl fdth,s A
11 Check ON/OFF If interlock is not working,
operation of isolator. check interlock circuit and
Check interlock of rectify.
isolator & breaker.
Breaker should not get vxj baVjykWd
ON if isolator is open
dke ugh djrk gS
vk;lksysVj dk rks lfdZV psd
vkWu@vkWQ fdth,s A
vkijsVj psd
fdth,s
vk;lksysVj
vkWu daMh’ku
es czsdj vkWu
ugh gksuk
pkfg,s A
12 Check oil level in series If oil level is low then top up
reactor.Top-up if filtered oil (60 KV BDV) in
required(only for oil type conservator tank up to
reactor) marked level.
vxj vkWby ysoy
lhjht fj;kDVj dk D;k gS rks
vkWbZy ysoy vkWbZy xje djds
tkaps A Mkyh,s A (60 KV
BDV)
13 After completion of
work, open earth switch
& close isolator.
dke iwjk gksus
ds ckn vFkZ
Lohp vksiu djds
vk;lksysV dks
Dykt fdth,s A
14 Return and Cancel permit
/ cross permit and
remove the red copy
from respective feeder.
ijfeV dWUly
fdth,s jsM
dkWih fudkys A
15 Rack IN & switch ON
breaker.
Ckzsdj dks jWd
bu djds vkWu
fdft,s A
16 Check current in all three If current is not balance then
phases. All three phase again check capacitance
current should be value of all three phases of
balanced. capacitor bank
lHkh rhuks vxj djaV cWysal
Qstks dk djaV ugh gks rks
psd fdth,s lcdk dWiWflVj dk
djaV ,d leku dWIkWlhVal psd
gksuk pkfg,s A fdth,s A
