how percentage impedence effect on the size of the power transformer?

2 Answers   Bhel,

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why we take movement of rotor always in counter-clockwise direction in 3-phase induction motors?

0 Answers  

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my UPS suddenly goes off and all panel light also blow off.This happens even main electric supply is not interrupted.After some time it automatically starts functioning normally.Batteries are new.

0 Answers  

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why some transformer without breather.

1 Answers   GTS,

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What is meant by Load Encroachment in OHL Feeder Protection?

0 Answers  

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why US countries maintains 110v and 60HZ

0 Answers  

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I got shortlisted in RRB thiruvananthapuram for the post of Junior Electrical engineer, waiting List - 7. i want to know about the validity of the current list and chance to get the job please help anybody knws abt it,, thank you

1 Answers  

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Dear all i want to know FEWA Electrical Supervisor Licence test Previous Year Questions ? If any body know please send to me shibin_75@yahoo.com

1 Answers   FEWA,

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How to calculate 33 kv panther conductor line losses.

1 Answers   Construction, Orange,

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What will happen if supply to three phase motor is given wiyhout inerting rotor in it?How much current it will draw?

5 Answers  

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What is the problem, if a circuit breaker is not closing.

4 Answers   KSEB, L&T, Siemens,

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Hi, I've just got into my electrical engineering course and I need some help with a question of mine here. During a site visit, we were shown a main LT panel which has switchgears, ammeters and different kinds of relays and the distribution network from that panel. In the main LT panel I've noted down the current readings as Ir - 163A, Iy - 150A and Ib - 147A. The Line to Line voltage is 415 V at 50 Hz and Line to Neutral voltage is 230V at 50 Hz. From the above details, how would I calculate the kVA rating of transformer? The primary side voltage of the transformer is 11 kV and the secondary side voltage is 415V and the frequency is 50 Hz.

2 Answers  

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