Answer / k.prakashchandra

50 Hz , 4 pole

WHAT IS MEANT BY vfd(VARIABLE FREQUENCY DRIVE )HOW CAN WE APPLY VFD TO MOTOR ? I WANT FULL DETAIL IF ANYBODY KNOW THE WEBSITE FOR THAT PLZ SEND .THANK U

2 Answers  

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Why -48V dc power supply using in telecom field?

7 Answers   APC, Cisco,

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Am i eligible to get electrical supervisor licence? As i did diploma as well as degree in Electrical Engg. in June 2011. Now i am working in 15 MW Power plant from 2 mnths. i belongs to Maharashtra.

1 Answers  

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there is a power transformer 66/11kV in delta-delta connection has 5 feeder coming out from the secondary side. One of the feeder in it normally loaded (loaded than other feeder)and this feeder usually trips with double OCR causing the bank transformer to trip. Now if the load of this feeder is put on other transformer then that no problems occurs on that transformer or the load. However normally all the test(IR, PI, short ckt, open ckt,grounding test and other ) has been conducted for this but evertything transformer..... I am not geting what is the actual problem...

2 Answers  

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what is mean by dual digital protection in the relay field?

0 Answers   ABB,

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how to calculate the battery Ah? what is the formula.

10 Answers   Cushman Wakefield,

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wat is d diffr btw shunt coil and trip coil in VCB?

0 Answers   NTPC,

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how much maximum load a 2 core (Single phase) 16mm aluminium wire can take ?

0 Answers  

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Neutral to earth and phase to earth voltage how much.

2 Answers  

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What should be the earth pit resistance value?

7 Answers   BARC,

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Why CT's shall not be kept open?

5 Answers   ABC, Qatar Gas, TIPL,

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what is different between synchronous & asynchronous motors

3 Answers  

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