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.

how to select the rating of neutral ct with reference to transformer secondary current(in power transformer,stepdown tansformer,for example2000kva,11kv/415volt

2 Answers   ASD Lab,

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why we use 25 kv in railway .not 11kv, or 33 kv

2 Answers   ISRO,

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is it value of power factor is more than unit. whats effects in the source supply

0 Answers  

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why substation ratings are multiple of 11 means 11\33 kv substation

6 Answers  

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yesterday i am using my laptop by plugging power supply also battery was working properly after while i unplugged AC power source ,using my battery i played car game (use much power) after that the battery finished the charge and it closed my PC. after that my battery not charge (when unplug automatically PC will turn off)

1 Answers   HPCL,

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When will you multiply and devide with derating factors to the actual value while sizing the cable?

0 Answers  

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kVA rating of open delta connected transformer is _____% kVA rating of delta/delta connection A 50 B 70.7 C 57.7 D 75.7

2 Answers  

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how to connect generators in parallel and what are the required equipment to do so?

2 Answers   MSEB,

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what is power factor? is it good or bad for a system? what will happen if power factor increase or decrease?

4 Answers   Bhel,

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What are the advantages of autotransformer?

0 Answers  

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Excat meaning of burden in only one word?

3 Answers   Bhel, DG Electricals,

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how mass curve differs from hydrograph.

0 Answers  

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