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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.
1879How to apply 'c' license and also explain what is difference between 'c' and 'b'license.i am also working in one of the private company.i have finished my diploma in 2014 .i have already finished in ITI electrician course.....
2021what is conductor constant of raccun conductor
CSPDCL-Chhattisgarh State Power Distribution Company Limited,
2236Please tell me in DETAIL about the following 3 types of fuses or recommend me a good power system protection book or a website link ? 1.Dropout Fuse 2.Striker Fuse 3.Empulsive fuse (not sure if its impulsive or explosion fuse , sorry)
2105What is the difference Marshaling box and RTCC (Relay tap changer circuit) Panel of transformer ?
1 6102Do you know what is dry-out test in x'mer
First American Corporation, GPSC Gujarat Public Service Commission, Jindal,
2651Post New Electrical Engineering Questions
What is the exact minimum vale of voltage between an earth and netural which can damage or can do malfunction of the electronic equipments ? If this is mentioned in any book, pl.give reference.
What are the classifications of heating element?
What si the d/f b/w KVA & KWH, kvarh & kvar, kwh & kvar phase voltage & line voltage
(1)WHAT HAPPENS WHEN SUDDENLY LOAD GIVEN TO THE INDUCTION MOTOR ? (2)CAN WE MAKE WOOD AS MAGNET ? (3)WHAT IS THE VALUE OF MAGNETIC FLUX DENSITY IN TRANSFORMER ? (4)WHY WE ARE USING ELECTROMAGNETI NOT ELECTROSTATIC IN MACHINE ?
what is earthing transformer? draw the winding dia.of earthing transformer.
in single phase converter, the no.of scr's conducting during overlap a)1 b)2 c)3 d)4
In EB metering we face problem kva jump even in no load condition.can any one help to control this
working principle of oil startar
I had applied for JE in PSEB, Can you pls send me the Question bank for related to my field
what is meant by 2 within a star in a voltmeter dial?
Could Please Explain briefly. Why used stabilizing resistance series with High impedance bus differential protection relay.
What are marginally stable systems?
what will happen if OLR CT in all phases are short circuted
Usage of flywheel diode in relays
Differentiate between kirchhoff’s first law and kirchhoff’s second law?
