800a siemens vcb in our company can not be closed electrcally an mechanicaly cc and oc coils are found ok. why?

2 Answers  

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What the reson for frequant instantaneous ground over current fault in our sync. Generator... 15 triping in 24 hr...

1 Answers   HCPL, Jhunjhunwala Vanaspati Jhoola, Regen Powertech,

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and gate circuit diagram,amplifier circuit diagram

0 Answers   NHPC,

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difference between shunt coil and tripping coil

8 Answers   GE,

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In a Tap changing transformer where is the tap connected , is it connected in the primary side or it is connected in secondary side

8 Answers   Indiabulls,

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in small capacitor we use uf( micro farad) and in big quantity we used kvar. i want to know that in 1 kva how much will b uf(micru farad).

2 Answers  

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how does relay works?

16 Answers  

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clarify types of motor operated valves and advantages

0 Answers  

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Difference between SFU & FSU with advantantages & drawback?

1 Answers  

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wht is meant by sh6

2 Answers  

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Electrical breakdown strength of an insulating material depends on............?why because?

2 Answers  

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why white color LED light is not possible?

1 Answers  

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