Electrical Engineering Interview Questions

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what are the different pre- commissioning tests performed on distribution transformer, power cable and switchgear?????

what is V.L.F. testing of power cable? do you know the voltage ratings, like for what rating and size of cable what rating of V.L.F. testing is used?

1019I 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)

If we connect the capacitor banks for DG set for maintainig the power factor, it will effect to alternator windings??????????

How can calculate the efficency of the rectifier. input 240V AC, current 5 amps,P.F 0.98, Output is 54 V DC,62.6 A.

In case of 11kV dual delta bank what are the recommended protections with specific CT / VT requirements? The capacitor bank is to be connected to the main 11kV switchgear from where the H.V.Motors and auxiliary 440V loads.

Hai I have 2500KVA,Transformer,13.8KV/380.DELTA/STAR.How much load that I can take interms of current?How can I calculate also when I have loads in KW?

L&T,

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Un-Answered Questions { Electrical Engineering }

how do prepare ongc exam.how is it question model.i am electrical. which part covering in electrical.tell me

WHAT IS THE PARTIAL DISCHARGE TEST?

what is difference between 5A and 100A CT constructional wise and operation?

What is meant by vector group

What is the formula to calculate the rating of power cable for three phase current.

how to calculate mf when meter and cTPT detail are given

What is the difference IN MCCB's between thermal magnetic and electronic tripping system ?

one electromagnet is called

The 3 phase Delta connection RB=440V, BY=350V,.......* is Line to Line voltage RY= ? And Formula....?

IF HT CAPACITOR IN ON POSITION IS THERE ANY LOSSES I.S I SQURE OCCURS IN THE SYSTEM

why three phase capacitor takes unbalanced current in capacitor bank?

An 8 pole, 50 Hz, 3-phase IM is loaded to a poing where pull out torque will occur. The rotor resistance per phase is 0.3 ohm and motor stalls at 650 rpm. The rotor reactance at stand still is A 2 ohm B 1.25 ohm C 3.15 ohm D 2.25 ohm

what is doid

why Y CONNECTION IS BETTER INTERMS OF EFFICIENCY AND P.F FOR A LAOD LESS THAN 40% AND WHY AFTER DELTA IS BETTER FOR > 40%

how to select energy meter? have any calculation?