Answer Posted / jai s s

Differntial protection is only use to protect winding
internal faults, It may be used in Generator or
transformer, it protect the paritcular inbetween zone while
we placed CT's. REF protection always used at star winding
side to protect nearby winding of star point which we can
not protect by residual earth fault.

Define open loop control system.

1109

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What is the reason of polyphase induction motor tripping suddenly on high current during running at 70% laod? Motor IR , winding resistance & inductance balance. Motor no load current is balance and ok as per mgfr. data.

2416

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how can i improve the power factor in domestic (230v)

2064

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As you achieve greater success with the company after some years, Will you like to be a share holder in our company?

2815

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which mm cable should be used for 1.hp immersible pump motor for the distance of 330 metres?

1713

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State angle criterion.

1118

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substation+ plc system

2081

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How to calculate impedance volt in Transformer?

2089

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how we decide scurt (disc) of insulator with respect to kv rating

3569

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when will be the iocl interview results i faced interview on 8th september 2008 iam from electrical branch i faced interview for the post of electrical engineer??????????????????????//

2052

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How DC earth leakage currents can be reduced ?

1927

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what will happen if the prime mover on the field excitation of the on-coming generator fails?Explain.

5547

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What should be the length of transmission line so that we can see/obtain the full sine wave of voltage??

1901

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What do you mean by dependent and independent voltage sources?

1050

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What is an Air COmpressor

2247

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