Answer / k.prakashchandra

% impedance = (rated current * impedance *100)/rated voltage

Is better to supply the voltage for static exciter from the auxiliary power source or from the SG terminals? And why?

0 Answers  

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how much percentage set in transformer diffrencial relay

1 Answers   Bajaj,

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I am an electrical power engineer and arranged power system for a data center, I installed MCB, ELCB and erthing system TN-C-S. But some times several ELCBs Disconnect circuits at the same time! what may be the reason? (the ELCBs are 25A ,30mA)

9 Answers  

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working of diesel generator ?

0 Answers  

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What is the use of centrifugal switch in 1phase induction motor? Why is it so called?

2 Answers  

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After synchronization with grid how to maintain the power factor in lagging or in leading? if lead of lag what is the problem?

3 Answers  

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what are symmetrical and non symmetrical components in electrical installation.

0 Answers  

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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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What are pre paid energy meters ? How it works ?

1 Answers   Siemens,

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Short circuit voltage of a transformer mainly depend on A ohmic resistance of primary B ohmic resistance of secondary C magnitude of leakage flux D cross sectional area of core

1 Answers  

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my question is Megger of cable insulation or swgr board meggerring some values in one day 50mohms,some other day checking different values(20Mohms). this tell that some person tell that that values ok. how to identify the megger value is correct. pls tell me the answer.

2 Answers  

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What is meant by pilot exciter and its working?

2 Answers  

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