Answer / virender

Low tension panel safety
Earthing of panel
ACB proper maintance
MCCB proper rating
Capictor panel working
Automation for backup supply proper working.
Rubber mat on the flore for person safety

what is the principle of vvvf drive motor

3 Answers  

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what should we do when the CT secodary gets open? how do we short circuit it? using tester or screw driver? not dangerous?

6 Answers  

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If current and resistance in a circuit is increased by 20%, what will happen to its voltage drop??

4 Answers  

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To prevent the mal operation of a differentially connected relay while energizing a transformer, the relay restraining coil is baised with (a)second harmonic current (b)fifth harmonic current (c)third harmonic current (d)seventh harmonic current

2 Answers  

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If we have a 2000kva load,How much kvar capacitors we go to add to improve the power factor at 0.9?pls give the calculation and fully theory?

2 Answers   ABB, Unitech,

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how much value of resistance should connect to 15 kw, 6 pole 3 phase slip ring induction motor having RV-240, RA-42.

0 Answers  

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What is measurement?

0 Answers  

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whats the reletion betweet flow,pressure,head,rpm and motor rating?

1 Answers  

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Why is back emf used for a DC motor? Highlight its significance.

0 Answers   ABB,

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why we r not earthed Control cable of C.T. terminals

0 Answers   HCC,

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whatis the commertial spec. of distribution boards ?

0 Answers   Bosch,

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tell me the operation of ELCB. How it detects a fault?

4 Answers  

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