check list of maintenance of transformer?
Answer Posted / 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 |
Post New Answer View All Answers
one split ac how can told of this ac which Tr tell me us
What is the restart inhabit setting in ABB spam150c relay (Motor protection relay)
electromechanical relay type identification example : type=tjmh t-stants for j- m- h-
Why L.T.Cable voltage rating is 1.1kV,where as system voltage is 0.415kV?
Main advantage of auto transformer over two windings transformer is that A it needs no cooling B it uses only one winding C core losses are reduced D it has simple construction
How will polarity test of Dy5 Transformer ?
Pl. give me checklist for installation & commissioning of machine tool.
what is the prosses for getting of 33kv licence (i have completed my engineering degree & working in 33kv substation for contract basis )????
sir pls tell me . our ct specifications are 120/5 ,2 core , 0.2 and 5p10 class , 30va and 30va buden. insted of 30 va i want use 15 va. can i use?
What is the different between digital phase converter and ordinary phase converter?
why tertiary winding is used in transformer with diagram?
what is load despatching
how braking & making capacity of circuit breaker are calculated?
what are carbondioxide and dcp used in fire extinguishers
what is the formula to calculate voltage drop/loss on 66KV Transmission Line?
