check list of maintenance of transformer?

Answers were Sorted based on User's Feedback



check list of maintenance of transformer?..

Answer / sant_c

Description Freq.
1. Checking of Transformer oil Level Weekly
2. Leakagee of Transformer oil W
3. Oil BDV test Y
4. Transformer Input &Out put terminal tightening Y
5. Eartging restiance testing Y
6. Watering to earthing M
7. Colouring of transformer if required Y

Is This Answer Correct ?    251 Yes 29 No

check list of maintenance of transformer?..

Answer / kiran

Daily check up
1)Oil level in conservator tank (Main and OLTC)
2)Oil leakages if any
3)Counter rteading of OLTC
4)Sound of Transformer
5)Hourly reading

Querterly Maint.
1)Cleaning of Transformer
2)Note down of Maximum temp of HV LV Wdg. & LV Wdg.
3)Checking of OLTC mechanisum Step by step
4)Tighting of HV & LV connection
5)Checking of gas collection in Bucholz relay, cleaning of
glass cover
6)Operation of cooling fan in manually,remote and auto mode


Yearly Maint: All above quarterly maint point plus
1)DGA Of transformer oil
2)BDV of oil
3)Insulation resistance test
4)Earth resistance test of earth pits of neutral and body
earthing
5)Protection check up

Is This Answer Correct ?    107 Yes 6 No

check list of maintenance of transformer?..

Answer / sathisha n p

1. BDV of oil
2. moisture content in the oil(gas operated relay)
3. leakage in inlet or outlet valve
3. checking the colour of silica gel(in breather)
4. oil and winding temperature

Is This Answer Correct ?    105 Yes 12 No

check list of maintenance of transformer?..

Answer / vinod

Maintenance :

1) Power Isolation of transformer with proper permit
2) Earthing of all hv/lv terminal after physical isolation.
3) Cleaning of transformer with lint free cotton.
4) Oil leakages checks for all joint
5) Silica gel re heating if reqd.
6) OLTC/OFTC local operation Check(calibration of motor
over load relay)
7) OLTC continuity check(by connecting analog meter across
across all the phase terminal and OLTC operation)
8) Alarm and trip circuit checking of OTI,WTI, MOLG, Mulsy
fire,Buchholtz of main and OLTC
9) BDV of main Oil and OLTC oil
10) PPM of oil
11) Tan delta of bushing, main Oil and OLTC oil
12) Magnetic balence
13) Ratio test in every tap
14) Winding resistance
15) Insulation resistance after LA disconnection
16) Secondary injection test of protection relays with CT &
PT test
17) Cooling Fan testing by OTI/WTI temprature (manully by
rotating the prob)
18) Other inter lock if any

Note: Normaly Annual maintenance cover most of the the
test, mainly 5 year test contain all the checks depends on
manufacture and customer check list.

Is This Answer Correct ?    48 Yes 6 No

check list of maintenance of transformer?..

Answer / venki

Answer
# 3 Daily check up
1)Oil level in conservator tank (Main and OLTC)
2)Oil leakages if any
3)Counter rteading of OLTC
4)Sound of Transformer
5)Hourly reading

Querterly Maint.
1)Cleaning of Transformer
2)Note down of Maximum temp of HV LV Wdg. & LV Wdg.
3)Checking of OLTC mechanisum Step by step
4)Tighting of HV & LV connection
5)Checking of gas collection in Bucholz relay, cleaning of
glass cover
6)Operation of cooling fan in manually,remote and auto mode


Yearly Maint: All above quarterly maint point plus
1)DGA Of transformer oil
2)BDV of oil
3)Insulation resistance test
4)Earth resistance test of earth pits of neutral and body
earthing
5)Protection check up

Is This Answer Correct ?    38 Yes 5 No

check list of maintenance of transformer?..

Answer / rashpal singh garcha

daily
1.physical appearance.
2.checking of silica gel colour (in breather).
3.sound of transformer.
4.oil leakage.
5.level of oil in conservator.
6.record oil and winding temperature.

quarterly
1.cleaning of transformer and yard.
2.tightening of hv & lv connection.
3.checking of bucholz relay,cleaning of glass cover.

yearly
1.dehydration of transformer oil.
2.check dielectric strength of oil.
3.check moisture content in oil.
4.check acidity test.
5.insulation resistance test.
6.resistance test of earthing pits.
7.protection check up.
8.tan delta test.

Is This Answer Correct ?    33 Yes 2 No

check list of maintenance of transformer?..

Answer / latika

For Power Transformer:-
1] Insulation test [P-N,S-N & P-S]- Yearly
2] BDV of Oil [top and bottom sample]- Yearly
3] Topping up of Oil if reqd.
4] Opening of all stud connentions cleaning of connectors,
washers, replacing damaged ones and reconnecting properly
both in HV and LV sides.
5] Conditioning the earth electrodes [ both body and neutral
earthings] i/c the continuty made by flats or copper wire,
tightening of joints if any, watering [weekly] in case of
hilly lands.

Beside that any urgent requirement like heavy oil
leakage, any generation of extra heat etc are to be attended
immediately.

Is This Answer Correct ?    19 Yes 2 No

check list of maintenance of transformer?..

Answer / somashekar

) Power Isolation of transformer with proper permit
2) Earthing of all hv/lv terminal after physical isolation.
3) Cleaning of transformer with lint free cotton.
4) Oil leakages checks for all joint
5) Silica gel re heating if reqd.
6) OLTC/OFTC local operation Check(calibration of motor
over load relay)
7) OLTC continuity check(by connecting analog meter across
across all the phase terminal and OLTC operation)
8) Alarm and trip circuit checking of OTI,WTI, MOLG, Mulsy
fire,Buchholtz of main and OLTC
9) BDV of main Oil and OLTC oil
10) PPM of oil
11) Tan delta of bushing, main Oil and OLTC oil
12) Magnetic balence
13) Ratio test in every tap
14) Winding resistance
15) Insulation resistance after LA disconnection
16) Secondary injection test of protection relays with CT &
PT test
17) Cooling Fan testing by OTI/WTI temprature (manully by
rotating the prob)
18) Other inter lock if any

Note: Normaly Annual maintenance cover most of the the
test, mainly 5 year test contain all the checks depends on
manufacture and customer check list.

Is This Answer Correct ?    21 Yes 4 No

check list of maintenance of transformer?..

Answer / balaram sabat

Maintenance :

1) Power Isolation of transformer with proper permit
2) Earthing of all hv/lv terminal after physical isolation.
3) Cleaning of transformer with lint free cotton.
4) Oil leakages checks for all joint
5) Silica gel re heating if reqd.
6) OLTC/OFTC local operation Check(calibration of motor
over load relay)
7) OLTC continuity check(by connecting analog meter across
across all the phase terminal and OLTC operation)
8) Alarm and trip circuit checking of OTI,WTI, MOLG, Mulsy
fire,Buchholtz of main and OLTC
9) BDV of main Oil and OLTC oil
10) PPM of oil
11) Tan delta of bushing, main Oil and OLTC oil
12) Magnetic balence
13) Ratio test in every tap
14) Winding resistance
15) Insulation resistance after LA disconnection
16) Secondary injection test of protection relays with CT &
PT test
17) Cooling Fan testing by OTI/WTI temprature (manully by
rotating the prob)
18) Other inter lock if any

Note: Normaly Annual maintenance cover most of the the
test, mainly 5 year test contain all the checks depends on
manufacture and customer check list.

Is This Answer Correct ?    17 Yes 3 No

check list of maintenance of transformer?..

Answer / pounkumar.s

transformer check list

Is This Answer Correct ?    5 Yes 3 No

Post New Answer

More Electrical Engineering Interview Questions

what is amf panel & how it is working

6 Answers   ATS,


what is the basic principle of TV camera?

0 Answers   BZU,


explain with diagram how to protect transformers and substations from over current with help of CT's?

0 Answers   BARC,


Can anybody just suggest about the scope of Electrical design with ETAP software?Just guide me?

0 Answers  


If we impress a dc voltage of 230 V on an unloaded 230 V, 50 Hz transformer it wi A give high secondary voltage B burn out C give secondary voltage as per K D none of these

0 Answers  






what is meaning volt-hz ration,where is necessry tomaintain and why. specialy during increase the power of generator.

3 Answers  


where transformer is installed? a)generating station b)substation c)voltage regulating area

6 Answers  


What if the difference beween internal and exrteranal LBB?

0 Answers  


Differnce between Analog & Digital

1 Answers  


when a three phase motor in running condition consumes 2A in each phase,and if one of the phase gets fails what will be the consumption in other two phases

4 Answers  


how to increase senstivity of ct

0 Answers   NPCIL,


We have 250 KW x 2 motors, which are load from 25% to 100% varying load in every minute , so how can we compansate the power factor. pl give your opinions on the above subject.

0 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5084)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16631)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1094)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)