Interested to Buy Any Domain ? << Click Here >> for more details...
Explain the working principle of Vacuum circuit breaker and
Air circuit breaker
- 10 Answers
- 48597 Views
- HP, Trinidad and Tobago Electricity Commission T TEC, I also Faced
- E-Mail Answers
Answer Posted / jobmon jacob
Vacuum is an excellent insulating medium. Arc is formed at the instant of contact separation from which metal vapour shoot off, constituting plasma. The cotact material are selected in such a way that the chopping current is very minimum. With alternating current arc, the current decreases during a portion of wave and tends to zero. . Soon after natural
current zero, the remaining metal vapour condenses and the
dielectric strength builds up rapidly, and restriking of
arc is prevented.A small portion of metal is exhausted during this process.This is used for Medium voltages.ACB is in low voltages.Here air is the quenching medium.
| Is This Answer Correct ? | 11 Yes | 3 No |
Post New Answer View All Answers
What is inverse definite minimum time lag relay? Where is it use?
how mass curve differs from hydrograph.
What happens if we run alternator on under frequency?
How to synchronization will be done between two DGs ?
please send me latest & previous years question papers for IOCL Technical level questions
how commomn gate triggering is given for TRIAC ? other thyristor wont be efffected?
A powerplant has 8 gensets operating in grid parallel mode. In one genset sometimes there is pf variation and kvar variation. The plant operates in pf mode. When this variation is observed the load is stable, voltage is also stable, freq and genset speed is also stable. How will you check the functioning of pf card. What shall be the ideal output vdc of the pfc, from there it is input to AVR?
Explain what is clipper and clamper circuits?
from generating station If 400v LT line length is 1000m how much voltage is drop and how do i calculate it? which cable will be use for this line?
HOW can i REuse the fused MLL LAMPS & GLS LAMPS at our factory
what does mean of RCT and STR in diffrential CT?
how a.c. genarator control power factor when its conected to grid supply by incrising or decresing excitation voltage.
what is efficient motors and how it is different from normal induction motors
if we install two earth pits with a clear space of 5m without any interconnection,by checking the digital multimeter will it show continuity between earth pits? If so what would be the approx. value
can any one tell me about the Extra low voltage systems?From where we give supply to these type of systems??
