what is the use of ballast in tube

2 Answers  

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How to calculate the slip ring induction motor rotor current and voltage.

1 Answers   Bhel,

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is it necessary for 200 kva transformer to have marshaling box and cu plate earthing for neutral

1 Answers   Blue Star,

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What is the purpose of stand by earth fault protection for transformer ?

0 Answers  

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Please, if 1kw is equal to 1.25kva; how then do I know how many kva in 7.5kw?

0 Answers  

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What is the knee point voltage of CT-100/5,15VA,5P20 ?

3 Answers   ERL, NTPC,

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state types of reflectors in illumination engg. ???????

0 Answers  

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Why we use startor to the motor?

5 Answers   Bhel,

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what is the use of reactive power

3 Answers  

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My system is 22kv/3.3kv transformer. client is asking to use NGR, but as we have dedicated Neutral Earthing systems which has a value less than 1 Ohm. So i want solid comparision. Why i should not use NGR as my system is already protected.Can any one help me to get out of this.how should i reply on basis of some great comparision and calculations. Please help

2 Answers   Ariel,

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how to arrange the generator protection ansi 48 (loss of phase?)

3 Answers  

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I have 3 1000 kva single phase transformers and I wish to replace them with one three phase transformer. What is he kva rating of the new three phase, is it 1000 kva also or 3000 kva.

5 Answers   Central Moloney,

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