what is the difference beteen differential protection and over current protection of an alternator

2 Answers   GVK,

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3) How earthing is done? How it measured? Write the method for earthing? How the earth resistance is kept low?

1 Answers   Innovative Energy,

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why we are giving D.C. supply to field of an alternator, why can't we give the a.C. supply

12 Answers   APTransco, Proman,

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if 3400kw slipring motor rotor shorting done and motor started on mv drive ,what will be the rotor shoring current

0 Answers  

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How can calculate rotor temperature of the alternator? and is there any method to calculate that

1 Answers  

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how to calculate the step resistance for slipring induction motor,how you deside the no of step for that?

0 Answers   ABB, Visa,

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Using 11000V/433V,3 ph,50Hz,500 KVA, what is the maximum capacity of motor in KW that can be connected and started at a single moment? Also explain about any calculations and formulas used in deriving the same.

4 Answers  

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What is corona? and what is the purpose of corona belt in substation ? why they connect these end of the buses ?

2 Answers  

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why colour of electrical equipment( like transformer) is grey

10 Answers   Trident,

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what is advantage of using star to delta in place of dol starter

4 Answers  

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IN MY SYSTEM THERE IS ONLY OVER CURRENT EARTH FAULT RELAY IS AVAILABLE. FOR THE UNBALANCE SENSING IS THERE ANY RELAY IS AVAILABLE? THE SAME CTs WHICH ARE USED FOR THE OVER CURRENT EARTH FAULT RELAY CAN USE FOR UNBALANCE ALSO?

2 Answers  

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what is SWA type of cable?????

4 Answers  

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