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
what is mean by NPS (Negative phase sequence)fault? what is the difference between EFR & OCR faults?
which type of questions asking for solar companies?
Motor,transformers,capacitor tubelight etc....
what is strip power factor?
give some advantages and disadvantages of combiniing the session, presentation, and application layer in the osi model into one single application layer in the internet model
what is earthing.how we make it,describe briefly.
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
is this the formula of building wiring to get the main breaker.Watts/volts*.8%+higher motor*(25%)=ampere. yes or no or send the correct formula for building wiring.
Give me the calculation steps to design an electromagnet to be work in 230V 50 Hz AC Supply. Also give force that is created by that electromagnet when it gets energized.
Why do we need a separate control desk & PLC control panel in Boiler plant or coal handling plant? Can we provide cost effective Control desk cum PLC panel. Is there is an specific need for control desk.. kindly advice.
Dear sir, By which formula u can calculate for a particular kv line there is a range of mw.
how to find three phase complex power in per unit and MVA?
what happen if the supply is given to the stator of the 3phase induction motor with out assembling the rotor ?
If we have 11 kv RYB Phase single core cable near about. Then wht effect and losses
why do we lay up the core of a cable?