Answer / sunil solanki

circuit breaker operating time & tripping time should be in
ms.also tripping time should be less than operating time.

Answer / barkha thakur

Circuit breaker operating time & tripping time should be
few cycles of the supply voltage

Answer / electrix

Cicuit Breaker Opening / Closing time are always in milli
secs. usually in 11 kv breakers it is around 60 - 80 ms for
closing and 40 - 60 ms for opening.

What is stepper motor. What is its uses?

0 Answers  

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a transformer runs by electro-induction principle like all motors.then why dosen't it rotate just like any other motor

2 Answers  

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why capacitor do not switch ON the DG power? (I had checked, capacitor ON in DG power that time current rating was reduced.)

1 Answers  

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what are the different functions of mccb, rccb / elccb ?

2 Answers  

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what is the function of potential transformer in s/s

6 Answers  

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what is a synchronizing lamp ?

0 Answers  

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what is difference b/w squirrel cage rotor and wound rotor

2 Answers   Bhel, Electrical,

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what is the maximum load on for 10 kva & 25 kva transformer

8 Answers   ABB, Power Grid,

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Why 3 over-current and 1 earth fault relay is used on primary side of transformer? Why 2 over-current and 1 earth fault relay in used on secondary side of transformer?

1 Answers   Adani,

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Use of electrical theorems (thevenin's,norton's,millmen's,superposition,reciprocity, Maximum Power Transfer theorem,Compensation Theorem) IN REAL LIFE???(IF YOU KNOW EXACT OR CORRECT ANSWER).

2 Answers   College School Exams Tests, L&T, PESIT, Wipro,

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Can any body describe me why a soft starter is used for 6.6kv induction motor instead of VFD ?

1 Answers   Cairn,

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What is the working of SCM CT or purpose in genrator ?

3 Answers   Bhel,

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