Answer Posted / gajendra singh

50Hz transformer has large size as for the fixed kva but as the frequency increase and kva fixed than size of x-mer decrease.
because of B-H loop magenetation characteristic

What is the exact formula for one weber of magnetic flux?

2135

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what is ps impedance test

2113

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I have made a 3 phase thyristor full bridge rectifier. But at the moment it is working only for the half bridge operation. Both the half bridges are on operation separately but when i put it into full bridge operation the oscilloscope output is zero. I rechecked that the pulses are correct for each thyristor. what could be the possible reason for this?

1934

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What happens to a line-frequency of high-frequency transformer when it is first energized/ re-energize?

2149

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How to determine alternating current frequency?

1145

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Can anybody tell abt concrete encased earthing or grounding?

2055

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what is the problem when i want to close a circuit breaker by local position it closes well.but when i close it in remote position it trips

1595

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How many types of faults are there in 3 phase power system?

1087

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what is the prosses for getting of 33kv licence (i have completed my engineering degree & working in 33kv substation for contract basis )????

1931

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Control cables in S's will carry 1000v which is AC R DC? Pls answer me 

2146

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Please brief what is sinewave

2139

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is there any device that works properly accept relay, it may be fuse but if i want fuse of 33kv 300 amp it is avaliable, pls give me details

1988

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If 24 KVA AVR having Input voltage 200-400v, Output voltage 415+-1%, what will be the voltage if Load is 13A.

2092

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what is calculation mathod/formaulla for deciding Size of busbar (Copper/ aluminum)for L.T. panel on Various Fault level like 50kA,25kA,10kA

2792

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What is the efficiency during maximum power transfer?

1218

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