Types of circuit breaker

1 Answers  

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What is the advisble power factor to be maintained in grid connecting power generation plnats without any effecting the generator.

1 Answers  

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sir i want previous entrance exam papers for written test

0 Answers   Vizag Steel,

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description about dry type transformers

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what is differentila pilot supervision in the incomer control panel in the power station?

0 Answers  

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when we r using 3.5 cable for a bldg. and put laod on each phase using the neutral and neutral is the return paht for the phase so the current of the neutral must be Ir+Ib+iY (return).But the size of the netural is .5 as comper to the phase.

2 Answers  

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If a 1.5V,3W torch light bulb is connected in series with a 15HP/11.19KW,230V single phase motor and the combination is connected against a 230V supply and switched on than what will happen keeping all other parameters as it should be A)the bulb will glow normally B)the bulb will not glow C)the bulb will glow with extra brightness D)the bulb will burn out and if a fuse is connected to the above circuit will something happen to the fuse and what about the single phase motor will it be affected? Please explain with derivation

4 Answers  

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What is the formula to calculate the size of Aluminium and copper cable?

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Please let me know when replacing electromechanical Relays for protection of generators with sr489 multilin Relay, then there is no need to use 86 master trip relay Too. I am wondering this multilin relay has no contact to Stop breaker reclosing as 86 does

1 Answers   Neucel,

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want happens when a dc is given to a commutator

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Why the brushes used in dc machines are made of carbon not from other metal?

3 Answers  

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how fault in an electric system is detected & hw protection of equipments is done ?

6 Answers   NTPC, RLY,

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