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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.
1825How 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.....
1987what is conductor constant of raccun conductor
CSPDCL-Chhattisgarh State Power Distribution Company Limited,
2184Please 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)
2066What is the difference Marshaling box and RTCC (Relay tap changer circuit) Panel of transformer ?
1 6010Do you know what is dry-out test in x'mer
First American Corporation, GPSC Gujarat Public Service Commission, Jindal,
2606Post New Electrical Engineering Questions
How to convert 2 phase to 3 phase electricpower in induction moter?
Why Transformer Neutral having one earth pit ( more earth electrode resistance) whereas body have many earth pit ( less earth electrode resistance)?
If a air condition consume 2.50 to 3.00 amp then how much it will consume in watts if it is running 10 hours out of 24 hours????
What is meant by rotor?
Draw a circuit diagram in which if button is open we can use socket and bulb as a series test circit and if button is close than simple we can use socket as any load purpose.
from generating station If 400v LT line length is 1000m how much voltage is drop and how do i calculate it? which cable will be use for this line?
During Starter Panel Com missing I Found The Main Incomer 40Amp MCB 10KA Trip When Motor Change Star To Delta Motor Rating 20HP BUT When We Use Same MCB To Other Motor It Does Not trip Or What Is Necessaries for Star Delta Starter MCB SFU MPCB OR MCCB And What are The Breaking Capacity of MCCB in the Motor above 15HP
What is resistance reading of earth copper rod with grid and without grid?
what is proper capacitor placement? How to evaluate capacitor size?
EHV current carrying parts need to have smooth finish,then how can a 245kv GIS with emery finish can run so long?
State ohm’s law?
WHAT IS MEANT BY INSULATION CLEARANCE IN VACCUM?
What is the Current equation in series RLC circuits.
Which type of DG need Netral Earthing?
explain the Trip supervision circuit
