What value of resistance required between Saftey earth and instrunment earth , maximum and minimum values required

1 Answers  

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where to use CT and PT?

4 Answers   CEB, Reliance,

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it says in neutral wire current flows under normal condition, but when we put tester it wont glow, why?

7 Answers   HCL,

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Is there any other method of damping the oscillation in a synchronous motor other than using damper winding and if yes what is it?

2 Answers   IOCL,

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types of transformer ?

3 Answers   CG, JLL,

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if voltage in transmission line more than current will be more or less,if less what about the Ohm's law

2 Answers  

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how can I calculate charging current of cable/overhead conductor? what is roll of voltage in it ?

0 Answers  

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Difference Between B Curve & C Curve in MCB.

3 Answers  

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please give me all the Alarm .Trip ,Safety Relays & Conditions of Chiller mail me on ashokbabunhce@gmail.com

0 Answers  

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I did oil BDV test of 1600 KVA trafo 20KV/400V as per IEC 156. Result is 1) 58 KV 2) 58 KV 3)40 KV 4) 50 KV 5) 58 KV 6) 18 KV. Avr is 47 KV. Can we say oil is still ok even in the 6th test BDV is 18 KV ?

1 Answers  

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When a square wave is applied to primary of a transformer then what will be output wave form of secondary ?

15 Answers   Bhel, Sail, Sterling Telecom, TCS,

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Different types of relay fault which phase sequence??

0 Answers  

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