what is the working principale of air circuit breaker ?
Answer Posted / suni
In Air circuit braker Air is used as a media to arc
extingusar.It is less cost maintance is eassy
Is This Answer Correct ? | 5 Yes | 5 No |
Post New Answer View All Answers
i have attended the interview on 4th June,08 at Kolkata in IOCL, can anybody tell me what is its result
What is excitation in case of dc motor?
what happend to DC shunt motor if its field winding insulation becomes slightly weak? will that motor can run on full load or not explain in detail. thanks
where we use the SFU & FSU?
what is cathodic protaction?
Why should we hire you over the others waiting to be interview?
What should be current in the Primary and secondary side of 1000KVA (11KV Supply)Transformer.?
What is domestic transformer? Draw the connection of domestic transformer.
What is Phase margin?
How Load Factor, Demand Factor, Diversity Factor etc best applied in designing an electrical circuit? Is it allowed to consider these factors in each and every panel in an electrical distribution system? Can any body suggest a good book for reference?
list of tests to be carried out at manufacturers end while purchasing a step up transformer of 11kv to 66kv ,2MVa Capacity.
Sir,In our company there are 3 caterpillar make(capacity:(1) 3.3KV,2.5MW(2)3.3KV,2.5MW & (3)3.3KV,1.9MW) & 1 deutz make (capacity:11KV,3.8MW)gas engines utilised,all are running in paralell. There are three transformer utilised,(1) 6.25MVA,3.3KV/22KV,Impedence voltage:6.7% used for two generator,both are 2.5MW(2)5.5MVA,3.3KV/22KV,Impedence voltage:7.2% used for one generator of 2.5MW & (3) 5.5MVA,11KV/22KV,Impedence voltage:7.8% used for one generator of 2.5MW.all generator breakers capacity of 1250Amps. Sir,I want the details of fault level calculation of generator,transformer individually & for whole system. If you require any information from me.feel free for contact me sir.pl.send the answer of my question as the earliest as possible.
why we change the direction of winding in rotor ?how we make the north and south pole?
what is the difference between oil surge relay and buchholz relay.
how to determine the cable size...pls explain me with the formula taking particular load....does the factors like impedance & short circuit rating influence the cable size, if so how....