Why colled 440V to 3-phase supply.

0 Answers  

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Does RCCB do the job of MCB? Lets take 16A RCCB. it trips when residual current exceeds 30mA. does it trip in an over current situation, i.e when current exceeds 16A ??

2 Answers  

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what is meant by trip circuit supervision & directional or non directional over current ?

1 Answers   ABB,

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what is difference between speed mode and torque mode in motor?? explain in simple words please.

0 Answers   Toyota,

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How we can recongnise the phase displacement of transformer connection between primary & scondary...plzzz explain it with example.........

0 Answers   BOC,

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A 500 V shunt motor runs at its normal speed of 250rpm when the armature current is 200A. The resistance of the armature is 0.12 Ω. Calculate the speed when a resistance is inserted in the field reducing the shunt field to 80% of normal value and the armature current is 100A.

0 Answers   VECL,

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how many earthing should give for transformer body and nuetral

5 Answers   GMR, GOMS,

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how do you reduce the skin effect

2 Answers  

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how to modify DOL control panel into Delta Y connection?

0 Answers   ABB, PDCS,

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Mention the disadvantages of low power factor? How can it be improved?

0 Answers  

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In more then 1 phase bulb will glow are not?if yes then how it will glow?

2 Answers  

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how the specific fuel consumption of 320 kva deisel genarator set (explain with formulas please)?

2 Answers   RRB,

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