Explain the working principle of Vacuum circuit breaker and Air circuit breaker

10 Answers   HP, Trinidad and Tobago Electricity Commission T TEC,

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1. When do you use a VFD motor? 2. If the ceiling fan is on slow speed, does it consume less electricity? 3. If we want the fan to consume less electricity at low speed, what do we have to do? 4. What does “battery of 180 AMP HOUR” mean to you? 5. What does “battery of 180 AMP HOUR” mean to you? 6. If you don’t have coal, salt and copper, then how would you earth your connection temporarily at a camp site.?

6 Answers   Asian Power, Bhel, Focus, Focus Energy, L&T,

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how to calculate the minimum permissible limts of insulation resistance of switchyard equipments

1 Answers   HVPNL,

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i have seen one 8.4 MW synchronous motor in a plant located in bellary it is fixed with brushless rotary rectifier ,anybody can explain its start up principle

0 Answers  

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difference between the applicability of nortons and thevenin theorem

0 Answers  

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Can we operate a DG Set in paralell with Transformer ?

6 Answers   NDDB, Sobha Developers,

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why neutral busbar size is half of the phase busbar size in control panels

1 Answers   IBS,

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Is LV shorted in magnettic balance test?If yes why?

2 Answers   Hindalco,

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Which types of gate insttaled in static switch. Please give me answer.

0 Answers   cpgn,

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can the measured percentage error during calibration of single phase energy meter be negative?

0 Answers  

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What is tan delta & PPM in transformer? and whats its IS value?

0 Answers  

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what is saturation? what role it plays in operation of ct's,motors etc and how its affects the behaviour of the same.

1 Answers  

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