Answer / bivin shankar

in vcb the arc extinguishing medium is vaccum which is
having high arc extinguishing capacity .but in ACB the arc
extinguish medium is air which is having low arc
extinguishing capacity, so if we use the air circuit
breaker in the place of vcb the arc will not extinguish and
may cause the equipment damage.

what is a FACTS devices? what is mean by STATCOM????

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What is CCTV System???Applications........

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Which is remain unchanged in transformer action?

6 Answers   NTPC,

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can any one provide some material?

1 Answers  

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pls tell us AC plant are how do work and parts name with picture

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what is the capacity of storing mass electricity.

1 Answers  

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What is the significance of %Z in case of transformer?

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what are the units of cable insulation?

3 Answers  

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we have require a Motor (1500kW, 6.6kV, 50Hz) which shall operate at 1500rpm during 30min and after it shall run on 500rpm during 15min. The same cycle shall be repetitive during the whole working days. Which method is best and economic to achieve such type of task. VFD, VVFD, Pole changing motor etc.

0 Answers   MTN,

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