how the earthing point or earthing is taken for ships and airplanes?

1 Answers  

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Is there any difference in AC current/ DC current carrying capacity of a conductor .What can be maximum current handling capacity of a 2.5mm stranded cu cable when connected to AC and DC supply.

1 Answers  

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what is the voltage level which is used in transformer short circuit test

1 Answers  

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how desiel generate sart fail of eb?

0 Answers   OPG, Wipro,

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what would happen if reactive power (kvar)is increased (more)or decreased (less)? how much exact reactive power should be maintained? and what should be done for that

0 Answers   ABB, Siemens,

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why transformers rating are in KVA

5 Answers  

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1) What is difference b/w impedence relay and differential relay? 2) what are substations equipments? 3) what is difference b/w circuit breaker and isolator? 4)what are the types of circuit breakers? 5) which medium is mostlty used in circuit breakers and why it is used?

1 Answers   NTDC,

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What kind of preventive maintenance are there for AC induction motor?

1 Answers   Gulf,

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why battery set is required for D.G.set?

7 Answers  

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how to control the generator output voltage? what r the condition should satisfy for synchronization?

7 Answers   HP,

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What conditions are required for transformer to operate at low frequencies ?

0 Answers  

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how to write program by ladder logic in case of PLC operation

3 Answers   Gridco, Sofcon,

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