what is cogging in motors?

1 Answers  

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what is transformer?

2 Answers  

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how you connect the induction motor first in star and then delta in star-delta starter

1 Answers  

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IF avr is voltage regulator of genset means why we are giving genset CT sense to AVR ?

3 Answers   ABB,

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How do we measure earth fault current in Generator Transformer(20/420kv),Station Transformer(20/11 kv) and Unit Transformers(20/11kv) for our plant system, since these don't have any Neutral earth Fault relay connected to their Neutral Earth? But for Unit Service transformers(11/.433 Kv) we have an Earth Fault Relay connected to its neutral earth.Why is such so?

1 Answers   NTPC,

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which level of transformer oil has got low dielectric strength ?why?

2 Answers  

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What is majour reason of Electrical Arcing ?

9 Answers   ABB,

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How phase to phase voltage comes 440V.

0 Answers  

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What meant by lagging and leading? When if they are occurred what preventive methods should be taken?

14 Answers   ABB, L&T,

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Why used in layer by layer charcoal and salt used in earth pits.

11 Answers   CESC, HP,

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How can i calculate knee point voltage of 800/5A Current transformer?please explain me with suitable calculation?

2 Answers  

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two TG running in parallel at equal load.one TG CB tripped in reverse power relay.after tripping found its excitation was on & turbine running at rated speed.Please clearify why that TG tripped in reverse power ?

1 Answers   Bhel, Birla,

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