how to diffrentiate between ac & dc motors from a distance

5 Answers  

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Explain Active power,reactive power,how its related to each other , & inductive ,capacitive.

0 Answers  

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What is working principal of V.C.B., O.C.B., A.C.B & Over load relay?

4 Answers   Unitech,

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what is lap & wave winding

1 Answers  

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How can you calculate in detail the VA burden of current transformer used for Restricted earth fault protection? Please understand that the CT required here is Class PX or X. Also please show the calculations for knee point vtg, stabilizing resistor, magnetising current.

3 Answers  

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what happens if we earth negative electrode of an rectifier transformer used in ESP. In which normaly positive is earthd from inside the xmer.

1 Answers  

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why Ac current is alternating in nature?(or)why alternating current changes its direction?

3 Answers   APGenco,

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why ups rated in kva

1 Answers   MRF,

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What is AVR? Explain the function AVR?

11 Answers   HSL, NHPC,

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On a 10 KVA UPS we have to provide a DC MCB for Battery bank of 16 nos (12 V 65 AH). What Shall be the current rating of DC MCB ?

6 Answers   RR, TNEB Tamil Nadu Electricity Board,

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What is cable gland,why does use for?

5 Answers   ABB,

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How to select the gauge of wire for winding of motors? How to select number of turns for winding of three phase induction motor?

0 Answers   npcc,

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