Answer / nagarjun

Apply 1.732*v*i*cospi.. We hv to know Wt the supply voltage is..

Answer / k.prakashchandra

Take pf as unity. kva= v x I/1000 .If three phase 1.732 x Vline x I /1000

how to reduce the transformer size in ups ?

2 Answers  

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Require Generator Capcity ( KVA ) for 3 Phase Motor having 4.7Kw with starting current of 16amps?

1 Answers  

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what is power factor ? how we can calculate the low power factor and amount of capacitor for improve that low factor ?

0 Answers   AB, JLL,

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State ohm’s law?

0 Answers  

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What do you mean by transformation ratio of instrument transformer?

0 Answers  

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what is the circulate the diesel in DG in side pls tell parts name and picture with circulate the diesel

0 Answers   Mukand,

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What is process of anneling transformer core

0 Answers  

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Hi My dear all Friends, There is a question regarding HVAC Engineering and widely used in Power Projects. Question- What is the diffrence Between REF, SEF and Differential Protection....???? Where REF - Restricted Earth Fault SEF - Senstive Earth Fault.

0 Answers  

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what i the full form of ABS 111 in transformer.

1 Answers   Birla, Ford,

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At no load the PF of an alternator -Zero -Zero Lagging -Zero leading -None of the above

2 Answers  

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For polarity test on a 11/3.3kV 2.5MVA delta-star Unit Auxiliary transformer,415V 3-phase supply was applied at the HV. Connection between Aa was made with a 2.5mm cable. As soon as power was switched on the cable caught fire and burnt. This test was then abandoned. It is noteworthy to say that a similar cable was also used in a similar transformer for the same. The cable did not burn and test was successfully completed with good result. What is wrong? Please, help me out.

3 Answers  

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why, when birds sit on transmission lines or current wires doesn't get shock?

36 Answers   College School Exams Tests, Infosys,

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