Answer / shariff

It is recommended to use two watt mater method, then W1+W2 will give total power in all the 3 phase, this method can be used for this un-balanced load conditions.

Answer / subbarao

Measure power in all the 3 phases separately and add them.

For 7.5HP motor 2880rpm 415VAC Connected with Pressurisation Fan we used Star Delta Startor why not we use DOL startor

2 Answers   DLF,

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how to measure earth resistance of a substation

0 Answers  

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What is the diffrence between an ELCB(earth leakage circuit breaker) and RCCB(residual current circuit breaker)?which has higher degree of safety and why?

2 Answers  

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Hoe to calculate body earthing conductor size ?

1 Answers   IES,

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4-Why we measure the insulation resistance of main core and frame in spite of that must be connected with ground before energize the transformer?

3 Answers  

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whether Transformer is singly excited or doubly excited machine?

2 Answers  

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1 no. 22 kV feeder is taken from state electricity board. 350 MVA is the S.C. MVA. now i am feeding this feeder to HT Panel having 2 outgoings which further supply to 2 Transformers. Can you please suggest me the type & rating of cables are 3 of these cables same? or they are different? please help...............

2 Answers   TCE,

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What do you mean by transformation ratio of instrument transformer?

0 Answers  

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Define unilateral circuit?

0 Answers  

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Difference between rating factor of cable and derating factor of cable?

0 Answers  

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How much current can 11KV line carry? What are the formulae used to calculate current across both side of transformer? Moreover I need to know can I connect 33KV line with transformer of 1600KVA? Details are: V=415, Pf= .9

3 Answers  

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What do you mean by creepage distance?

4 Answers   Amara Raja,

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