Answer / meenakshi

its a device or combination of devices which is mainly
intended for the purpose of making,carrying and breaking of
electric current in a circuit under normal condition or
also under abnormal(faulty)condition.

Why use the vcb at high transmission system ? Why can’t use acb?

0 Answers  

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why we are grounding the neutral?

1 Answers   GE,

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there are 3 transformers each of 1500 kva and one transformer of 1000kva for a 11 floor building . total otgoing kw is 4066 kw. i need an extra 260 kw .is there any provision for that? what is the max kw that can be connected with these transformers?

2 Answers  

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how to calculate busbar size? if ex:1000amps i need to calculate busbar size and what size of bar?if any example caculation pls give the formulas.

2 Answers  

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How to determine the short circuit current for breakers and VCB.

1 Answers   Sabic,

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what is the difference between current rating and breaking current of an MCCB? and for a known load how to calculate the current rating of a MCCB?

1 Answers   HPL,

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Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

0 Answers   Pride Hotels,

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if AVR fails in D.G set, what will be the effect?

7 Answers  

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what is the difference between R Y B windings in three phase.does it differ by construction or by number of windings?Explain the difference between them.

3 Answers  

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if one of the phase is failed to 3 phase IM. what will happen?

6 Answers  

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I have a 25kVA three phase transformer on our property. Will this transformer be large enough to run a large home with swimming pool, spa, 2 off full size reverse cycle air conditioners to service a 100 square house (10,000 square feet or 930 square metres)and the general power consumption of this house without upgrading to a 63kVA transformer.

1 Answers  

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What is the meaning of floating point earthing in battery backed systems ?

0 Answers  

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