how to understand the controling circuits example star- delta-starter controling daigram please let me know
GMR,
3 7753i am electrical and elctronics engg passed out in 2009 want to attend for reliance placements.plz send me apttitude ,technical and hr question answers to my mail plz. my mail id-kat.bindas@gmail.com
1758Is C.T will sense the current in both direction. As i know the C.T will sense the current in only one direction.
2 5453can we use existing delta star with neutral grounded,step down(6.6kV/415V), 3 phase power transformer bi-directionally.
GMR,
3 5559A three phase transformer 460v primary 220v secondary (three phase four wire system.) Why did we get 460 volts across the neutral on the secondary side?
3 6221I have 12MW gas engine based power plant its running parallel with grid. my problem is When cpp run in island mode(without geb) that time geb transformer power factor is 0.2 lagging. When cpp run with parallel that time power factor is 0.94 lagging So how can i maintain power factor ofgeb transformer in island mode 0.9 lagging?
SPCL,
1 2423Post New Electrical Engineering Questions
I am doing apprenticeship training at HT switch yard in NLC. How can i get electrical c license. ??? What r the rules for getting it as an apprentice? ??
Why neutral is not used in three phases dol starter
The principle of switching circuits for different types of batteries in application of storage systems
in the case of 6.6kv motor starter combination contain fuses on it VCB. but in 11KV motor starter combination Fuses are not using in it's VCB why?
how to protect motor in dol starter having capacity of 30 hp.40 hp?
in conventional fan regulators how the current varies with speed?
Why does inductive loads consume KVARs?
How npn and pnp transistor works
with 3 phase board on a 63 amp rcd is it ok to have 6 electrical showers 2 on each phase and what problems could happen
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I - is the value of AC fault current. t - is the operating time of disconnecting device in seconds. K – is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.
what is mean by restructuring power system?
how to calculate the earth fault current
why do we put a transformer on soak before loading it
actually i can't understand what is 3dB ? and it's really not clear to me.please any one let it me be cleared.
what is the electrical?
