what is resticted earth fault protection ? how did it protect & work in power transformer

3 Answers  

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What is water cooled chiller plant?

1 Answers   Gulf, IOCL,

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when ac current flows thru d coil of a contactr,it energizes,magnetic field attracts d contact of the coil...nw wont dt ac current in d contct induce current back on to d coil thru mutual inductance leading to high currnt in d coil

0 Answers  

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what is formula of illumation calculation

0 Answers  

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what's the meaning of the negative going half cycle in the circuit containing a bulb and a switch in series with a input ac source. i mean what happens in the -ve cycle. the dir. of current changes or any other thing. if dir. changes then why we use fuse in only phase wire.

2 Answers  

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define transient state &steady state

1 Answers  

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how we can varying the speed of dc motor ?

6 Answers  

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what will happen to the core losses if we perform the open ckt test on high voltage side of a transformer ?

2 Answers  

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what is the purpose of battery tap voltage.

3 Answers   ABB, Crompton Greaves,

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Explain the working of any one cutting machine

0 Answers   Mahatma Gandhi University,

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How to choose primany and secondary side MCB

1 Answers  

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In TNC switch, is there any 1NO+1NC block ? and if we move over closing position, is ther any affect on trip position or vice versa?

0 Answers  

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