Answer / nandagopan

This is found in telecom area.most of the phone wires are
copper.its almost exposed to atmosphere,sand and corrode
producing copper oxide this is why copper act as positively
charged ion to act with negatively charged oxygen.so a wire
with a positively charged accelerates corrosion.to slow down
the positive is grounded to give a negative charge.

VCB in closed position during opertion if vaccume break then what will happend? it has any protection ?

1 Answers  

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Is there any question in the name of Static Switch in UPS??

0 Answers  

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how does commutator convert a.c to d.c?

0 Answers   NRSC National Remote Sensing Centre, RBC,

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The rating of Transformer are 11KV, 22KV, 33KV instead of 10KV, 20KV & 30KV?

2 Answers  

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how we can differentiate a motor and a generator just by a glance?

5 Answers  

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Why we are use 11KV / 22KV / 33KV / 66KV / 110KV / 230KV / 440KV this type of ratio. why cant we use other voltage ratio like 54KV / 99KV et.,

8 Answers   College School Exams Tests, Hino, ITC Infotech, Reliance, UPRVUNL,

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Why induction motor can not be operated at synchronous speed?? what would happen if it is operated at synchronous speed??

5 Answers  

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Explain the operation of grid connected central solar inverter ?

0 Answers  

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i have gear oil pump with single phase motor.some time its motor starts running in reverse direction rather than forward direction...whats the reason behind this issue. 1- either capacitor is week? 2- or winding is week?

0 Answers  

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which has more heat effect(dc or ac)

4 Answers   CCEL, TATA,

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what is the difference between thyristor & IGBT?

2 Answers  

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dear friends, we are use 130 hp load run with 0.98 power factor ( 38KVAR capacitor connected ). if we need improve the the power factor to 1 (unity). how much kvar capacitor to be add. have any formula? please share with me.

3 Answers   Reliance,

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