can anyone send me some sample question regarding power grid corp

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What are the causes of unbalanced current on 34.5kv feeder Ia=0.05,Ib= 0.25, Ic=0.15 and In=0.27 prior to tripping current are balance?

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What is purpose of reactor?.What is different between line and bus reactor?

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Is potential difference materials property ..? if yes tnen how.. explain brifly.

0 Answers  

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if an alternator or turbine using fuel to produce ele energy and we didn't connect load to the ends then where was gone the ele energy

2 Answers  

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My switchgear busbar is rated at 2000A and just imagine the actual load on busbar is 1000A. From that busbar there are 10 outgoing feeders. Now the question is will the load be 1000A on each outgoing feeder or 100A per outgoing feeder. 2nd thing how do i calculate the load on individual feeder. Thanks for your time. Please provide some clarification on this issue.

1 Answers   Alstom,

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transformers? power factor? machiences?

3 Answers  

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Why 1/3 is used in symmetrical components?

0 Answers   ABB,

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What is the voltage b/w nutral and earth

11 Answers   Mind Space,

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In aircraft,why we use 400 htz equipment.and use common earthing

1 Answers  

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how much load should be given on 5 mva transformer

7 Answers   NTPC, OHPC, Power Grid,

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what happens if commutator is removed in an dc machine?

3 Answers  

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