Interested to Buy Any Domain ? << Click Here >> for more details...
check list of maintenance of transformer?
Answer Posted / 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 |
Post New Answer View All Answers
how could we know the size of cable by physical view?
we have 2.2kw,Y,3000rpm motor but 6leads found in TB what happen if we connect in delta?
when we gave dc supply to 220v dc motor its rpm is 1200. then we gave 180v. how many rpm of its motor. gave answer with calculation at my ID.... ravizak@ymail.com
what is alluminium arm in ab conductors
What is block diagram?
What is purpose of reactor?.What is different between line and bus reactor?
How can i calculate the Breaking capacity of molded case circuit breaker, is the breaking capacity of CB for Diesel generator shall be less than grid supply's breaker ?
What is the count of hvdc transmission lines in india?
Could u pls tell me the NPCIL electrical engineering interview questions for Executive trainee, and also guide me how to face the interview.
how do u gauge the size of the cable ?for eg. consider a 300 sqmm L.T Cable.How do u determine the size of the cable seeing it pratically?
DEAR SIR,I GOT THE CALL LETTER FROM RRB, SECUNDERABD AS A JE-II SO PLEASE PROVIDE ME SOME MODEL QUESTION AND ANSWER PAPERS AND LAST YEAR QUESTION PAPERS
Please, if 1kw is equal to 1.25kva; how then do I know how many kva in 7.5kw?
is it possible for different brand of H.V transformers to run or operate in parallel to each other? if so how much disturbance can this affact the H.V bus bar?
What is the function of auadag in a cro?
In siemens S7-300 PLC, what is function and function block ? What is the difference between them ? When to use function and when to use function block ?
