Answer / nagendra

Whenever a fault occurs the circuit breaker trips.Reclosing of the breaker automatically when the fault on the system cleared is known as auto reclose system in circuit breakers

Answer / raul

basically there r 3 types of faults..... transient fault
(80%), semi-permanent fault (12%) and permanent faults
(8%). transient fault occurs only for a small duration, the
CB is opened for a short duration of time so dat d cause of
failure is cleared and the line is re-closed by closing the
CB. for semi-permanent faults which r basically due to a
twig falling on d line or a bird spanning around a
conductor.......the auto-reclosing after the cause is burnt
away.........and finally the permanent faults ie single
phase permanent fault n 3phase permanent fault.....for 1-
phase fault, the remaining two phases r operational n the
faulted phases is taken out for repairs n after d repair is
done the line is reclosed n for the other 3-phase fault,
the complete 3-phases r taken off for repair n after d
repair is done, all d 3-phases r reclosed

Answer / vinod

Auto reclose is using in transmission line circuit breaker
with selection of single phase, three phase or single and
three phase.

In transmission line there is chance of momentery fault,
based on the area and lenth the time and times of auot
reclose being selected.

Answer / tarun purohit

When any fault occures in line,the circuit breaker trips the supply off to the line.This is called the auto reclose system in Circuit breakers.

if main CT is of ratio 50/5, and meter CT is -/5 what will be overall multiplying factor of meter.PT is 11000/110 .

0 Answers   BSNL,

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why ups rated in kva

1 Answers   MRF,

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Please tell me in DETAIL about the following 3 types of fuses or recommend me a good power system protection book or a website link ? 1.Dropout Fuse 2.Striker Fuse 3.Empulsive fuse (not sure if its impulsive or explosion fuse , sorry)

0 Answers  

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What is miller crystal oscillator? Explain its operation?

0 Answers  

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do we people experience any shock if we catch any one of the three phases (R Y B)in air with out touching ground.

7 Answers  

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When are the directional relays used?

0 Answers  

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What is the use for cable entry in control room?

0 Answers  

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what is dc transformer? how it work?

15 Answers  

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What is meant by pitch of a synchronous machine.??

1 Answers   Kirloskar,

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what is saturation? what role it plays in operation of ct's,motors etc and how its affects the behaviour of the same.

1 Answers  

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WHY PROTECTION CT IS USED NEXT TO METERING CT?

1 Answers  

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what is the clearance time circuit breakr?

1 Answers  

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