Directional over current relays have two exciting coils connected across _____ secondary's of two _____ phases

GETCO Exam Paper (30-11-2008)
Directional over current relays have two exciting coils connected across _ secondary's of two _ phases

T., different

T. & P.T., different

T. & P.T., same

P.T., different

T., different

T. & P.T., different

T. & P.T., same

P.T., different

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GETCO Exam Paper (30-11-2008)
The disadvantage of transmission lines as compared to cables is

exposure to lightening

exposure to atmosphere hazards like smoke, ice, etc.

All of these

inductive interference between power communication circuits

exposure to lightening

exposure to atmosphere hazards like smoke, ice, etc.

All of these

inductive interference between power communication circuits

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GETCO Exam Paper (30-11-2008)
If the folt current is 2000 A, the relay setting is 50 percent & CT ratio is 400/5, the plug setting multiplier is

10

50

25

15

10

50

25

15

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GETCO Exam Paper (30-11-2008)
A buchholz will operate in a transformer whenever there is

any of the above

large internal fault

saturation of magnetic circuit

over load

any of the above

large internal fault

saturation of magnetic circuit

over load

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

GETCO Exam Paper (30-11-2008)
Rewirable fuse has _____ time-current characteristic

inverse

linear

square

none of these

inverse

linear

square

none of these

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GETCO Exam Paper (30-11-2008)
The symmetrical components are used in fault analysis because

the result are in terms of symmetrical components

the number of equations become lesser

none of these

the sequence networks do not have mutual couplings

the result are in terms of symmetrical components

the number of equations become lesser

none of these

the sequence networks do not have mutual couplings

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GETCO Exam Paper (30-11-2008)

GETCO Exam Paper (30-11-2008) Directional over current relays have two exciting coils connected across _____ secondary's of two _____ phases

GETCO Exam Paper (30-11-2008) The disadvantage of transmission lines as compared to cables is

GETCO Exam Paper (30-11-2008) If the folt current is 2000 A, the relay setting is 50 percent & CT ratio is 400/5, the plug setting multiplier is

GETCO Exam Paper (30-11-2008) A buchholz will operate in a transformer whenever there is

GETCO Exam Paper (30-11-2008) Rewirable fuse has _____ time-current characteristic

GETCO Exam Paper (30-11-2008) The symmetrical components are used in fault analysis because

GETCO Exam Paper (30-11-2008)
Directional over current relays have two exciting coils connected across _ secondary's of two _ phases

GETCO Exam Paper (30-11-2008)
The disadvantage of transmission lines as compared to cables is

GETCO Exam Paper (30-11-2008)
If the folt current is 2000 A, the relay setting is 50 percent & CT ratio is 400/5, the plug setting multiplier is

GETCO Exam Paper (30-11-2008)
A buchholz will operate in a transformer whenever there is

GETCO Exam Paper (30-11-2008)
Rewirable fuse has _____ time-current characteristic

GETCO Exam Paper (30-11-2008)
The symmetrical components are used in fault analysis because