Answer Posted / parmod kuma

In annual maintenance we check the following points in oil
type transformer

1. We check the die-electric strenth of the oil.
2. We check moisture of the oil.
3. we check Be=reak down voltage of the oil.
4. We check the earthing of the transformer
5. We check Silica gel .
6. We calliberate all the relay like over corrent, earth
fault & differntial relay.

What does the term “voltage regulation” means?

1175

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What will be the impact on motor performance if a LT motor is rewound with changed motor winding data as given below:- Original winding data: total 04 wires = 02 wires of 17 SWG + 02 wires of 16.5 SWG. Changed Winding data: total 03 wires of 15.5 SWG wire size Motor rating: 160KW, 740RPM, 415V, ID FAN application. Normal Running Current = 95% of FL Current.

2123

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why can the rotor of 3 phase slip ring induction motor not be a 2 phase rotor?

2107

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1.why should we connect the measuring instruments in l.v side in short circuit test of a transformer? 2.why the power factor is less in open circuit test of a transformer?

2119

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HOW WORK HEAT PLATE EXCHANGER

2049

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how can tell us the AC indoor or outdoor which Tr and formulls

1813

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how oil in the MOCB was reduced compared with OCB? what are the features of the MOCB?

2828

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what is th basic difference between a d latch time line and a d flip flop time line???

2032

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for 11KV OH system what will be typical per KM "R" "L" "C" parameter. for 33KV OH system what will be typical per KM "R" "L" "C" parameter. for 33KV UG system what will be typical per KM "R" "L" "C" parameter.

2542

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what is auto re-closer?

2723

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substation+ plc system

2130

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draw a circuit diagram connecting transformer OLTC- RTCC- VCB-Marshalling Box otherwise Explain in words

23303

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What is the settings of distance protection relay in 400 kv line

1753

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Why let through energy not considered for ACB breaker while cable sizing?

2469

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what is zinc diffusion?

2167

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