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How to calculate capacitor bank value to maintain unity power factor with some suitable example?
1140Why we do 2 types of earthing on transformer (ie:)body earthing & neutral earthing , what is function. I am going to install a oo kva transformer & 380 kva dg set what should the earthing value?
1145Why an ac solenoid valve attract the plunger even though we interchanges the terminal? Will the poles changes?
1214What is derating?, Why it is necessary, it is same for all means for drives, motors,and cables.
1 1950Post New Electrical Engineering Questions
what will happen if i connect 12 volt battery with 24 volt battery charger.
BSNL TTA EXAM QUESTION
what is the range of maximum DOL and SDS can be use for pump and fan application
i am an maintenance engineer. one distribution board have 5 feeder. recently its ELR trips frequently, but it take some times after trip( 10min,20min..)but 3 feeder no load. two feeder only loaded. i checked one feeder IR value all values are above 50Mohm.but B phase to Earth is only 9Mohm.any problem about low value
How to decide the size of the capacitor for a single phase induction motor say 2 HP ??
how we decide wire gauge for ac or dc coil and what is the basic diff. B/w these two coil?
1.why should we connect the measuring instruments in l.v side in short circuit test of a transformer? 2.why the power factor is less in open circuit test of a transformer?
Electrical Engineering
What is miller crystal oscillator? Explain its operation?
WHAT IS SITTING AMPS IN OVER-LOAD RELAY FOR 1PH OR 3PH MOTORS?IF ITS NAME PLATE GIVEN MAX AMPS 10AMPS?
what is meant by 2 within a star in a voltmeter dial?
why we are using Load factor?
Pl. brief about break-down maintenance of machine tool.
what is charger supervision and control supervision?
what are the precuation should be taken ahen installing power transformer,circuit breaker,current & potential transformer
