Answer / himanshu_dee

REF protection is applied on transformers in order to
detect ground faults on a given winding more sensitively
than when only using differential protection.

what are upstream faults and downstream faults in power system

2 Answers   Sreetech,

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what is the size of ht cable of 33kv ht line and transformers ratings are 2.5mva and 5.5mva.please send formula also.

1 Answers  

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Which of the following can be operated at higher frequencies ? -SCR -MOSFET -IGBT

4 Answers  

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Excat meaning of burden in only one word?

3 Answers   Bhel, DG Electricals,

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what do u mean by knee point voltage?

7 Answers   TATA,

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what is current

8 Answers   NTPC,

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what is the principal of ceiling fan and how it will rotates? what is the magnetic momentum produces inside the fan?

1 Answers  

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what is onan, onaf, ofan, ofaf in transformer?

8 Answers  

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can we use 220 volt 15 w a.c. lamp on 220 volt d.c.

11 Answers   Philips,

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Give two basic sprrd control scheme of DC shunt motor.

2 Answers  

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What is the meaning of capacity of a 63 Amps TPN MCB? Is it the per phase capacity or the totol capacity?

1 Answers   Mother Dairy,

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what will be the energy loss =? Voltage drop = ? Conductor resistance at 20 degree C = ? Temprature convertion Factor at 50 degree c = ? on ACSR DOG Condutor at following data. distance = 4.8 kM Load = 2980 kWh Size of Conductor = 6/ 0.186 Volt = 11 kV.

1 Answers   Pakistan Atomic Energy Commission PAEC,

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