what is F.A.P in fire alarming system?

3 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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what is gridrotor resistance starter

0 Answers  

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tell me any book for current n potential trasformer with full knowledge ?

1 Answers  

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some meggers have three terminals. wat is the real function of the earth terminal?

2 Answers  

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if a 2 ohm resistor,2 ohm capacitor and a 2 ohm inductor is connected parallely to 12v source.Then what is the value of current in each branch.Is current flows in each branch at the same time?If not so then provide the proper sequence

1 Answers   Tata Steel Limited,

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what will be happened when a single phase motor is supplied by the dc supply

3 Answers  

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give 5 differences between relay and contactor

1 Answers   Texas,

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what is the RMU and RMU system in sub-station(11kv,66kv.....)

2 Answers   Alstom, Torrent Power,

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What is difference between Over Current & Earth Fault protection?

0 Answers   ABC,

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A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.

0 Answers  

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What is the rating of HT SUBSTATION and LT SUBSTATION?

11 Answers   NTPC, Sail,

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