Answer Posted / avinash

sir,we also use 3 wire,1 wire for +,2 wire for -,and wire
for earthing

Can you tell me more about pu systems (per unit systems )calculation in large power systems? how to get the base for voltage and power in generator, transformator and transmission lines?

2282

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should %impedance be high or low in a power transformer? if so why?

1920

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what is the basic construction diffrance between servo motor ans sqiralcage induction motor

2461

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what is earth fault relay 64T, why it is used in main Incomer and neutral CT of Transformer.

3785

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can you send me the placement papers of electrical engg. from companis like NTPC,DRDO,IOCL,HPCL,BPCL etc.?If,plz send as soon as possible.Thanks.

2145

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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?

1506

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If one tertiary phase i.e. R,Y or B is earthed of a loaded type tertiary delta connected (Without load)of a power auto transformer, what is its advantage/disadvantage?

2077

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why we r not earthed Control cable of C.T. terminals

2028

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What is meant by derating factor?

1218

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how can check the resistance of battery contact?

2197

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what is doid

2811

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IF alternator SCR value will be high means what happen in alternator efficency at operating power factor of 0.8

3856

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how the phase convertor changes the no. of phases

1990

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what is the calculation method to design core and winding of a 200kva 3phase distribution transformer?

2389

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Q.1:What protection will be used on HT and LT side of 33/0.4 KV, MVA transformer. Indicate capacities of protective device to be used. Q.2:Which types of back-up protections are used in the power transformers? What do you understand by the term over travel in the relay? Q.3:How star and delta connected winding transformer are provided from earth fault

2119

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