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A power transformer 4MVA/11KV/0.415Kv has been out of use in 12years. what maintenance actions/test need to be carried out before energizing.
1275In a Impedance Based Distance Relay (Quad Characteristics) - Could there be two different Line Angle(RCA) for Ph-Ph & Ph-Gnd? If So Kindly Let me Know.. Where, What are the advantages of the same?
1372can we choose current transformer secondary, to calculate residual flux in a power transformer, so as its saturation is close to the saturation level of power transformer?
1426What will be the current drawn by HT motor, if low voltage is applied.. any formula to calculate the LT amps of HT motor.?
1411Why Water motor is not taking a load or pressure while everything is correct. (Note: Motor running properly)
1364Post New Electrical Engineering Questions
What is a differential amplifier? Also, explain cmrr.
How we can calculate the life of Lead acid battery
what is fault level of power system ?
How will be the single line diagram of series trip HT breaker? how it works?
hi frnds...pls send me aptransco previous papers .....pls..pls,,,(madhar.rocking@gmail.com)and suggest me some websites
Why do we use copper cable for HT Supply and why not Aluminium?
how to compute kAIC? with formulas...
what is the difference between b c d curves on mcb
what are factors to be consider in electrical installation like load factor,diversity factor .....
What should be the voltage between Neutral and Ground in secondary side of the step down transformer (230 V to 110 V) with no load condition?
State superposition theorem?
A powerplant has 8 gensets operating in grid parallel mode. In one genset sometimes there is pf variation and kvar variation. The plant operates in pf mode. When this variation is observed the load is stable, voltage is also stable, freq and genset speed is also stable. How will you check the functioning of pf card. What shall be the ideal output vdc of the pfc, from there it is input to AVR?
Please clarify 1. Icw: rated short circuit working withstand capacity 2. Icu: Rated ultimate breaking capacity 3. Ics: Rated service short circut withstand capacity 4. other specification of ACB
5- What is the task (function) of the excitation and isolation transformers in power plant? 6- What is the task (function) of LCI (A), LCI (B) and LCI (COS) in power plant? : LCI (A) and LCI(B) are load commutating inverter for generator turbine starting. , LCI (COS) is load commutating inverter change over switch
