Why do you get a typical sound when the transformer is put into operation?

4 Answers   IIT,

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how a.c. genarator control power factor when its conected to grid supply by incrising or decresing excitation voltage.

1 Answers  

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A 7 storey building has a floor area of 35,000sq.ft on each storey. On the ground floor 11KV electrical sub-station is to be erected. A load of 3kw for every 400sq.ft (p.f is 0.8) is proposed for each floor. fire pump 7.5hp, water pump 5hp, lift 2 nos, each 10hp and 20shop load of each shop is 5kw. calculate a. load each floor b. total load of building c. L.T feeders for aech floor and from transformer to main. d. distribution diagram e. capacity of sub-station/capacitor bank f. line diagram

0 Answers  

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why secondary of c.t. will kept open ?

4 Answers   L&T,

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What is limitedly stable system?

0 Answers  

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formula for cable size calculation for current?

10 Answers   KL Power, ONGC, RL Clean Power Pvt Ltd RLCPPL, SAS, Sobha Developers,

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Please describe HT and LT?

1 Answers  

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Is it possible to protect 3phase overload and earth fault of the 3phase system using two CT's.

0 Answers  

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Why we can't start a tube light without a starter(choke) and an inductor?

1 Answers  

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if one potential missing in energy meter , how much % slow the energy meter?

1 Answers   NTPC, SK,

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Define settling time.

0 Answers  

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as we see that in our country the power rating for transmission is always rated in multiple of 11 like 11kv,33kv,66kv132kv. So i want to know wht is reason or logic here.

2 Answers  

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