How instantanious short circuit current is calculated? its
formula?
Answer / sriram
This calculation Applicable for 3 phase fault.
Transformer:
Step 1:
First calculate Full load current
I(F.L)=(KVA*1000)/(V*1.732)
Step 2:
Calculate multiplier factor(M)=100/%Z
Step 3:
I(sc)=I(F.L)* M
Motor
Step 4:
F=(1.732*L*I(#phase))/(c*n*E(line-ground))
step 5:
M=(1/(1+F))
step 6:
I(s.c)sym rms=I(s.c)*M
I(s.c) MOTOR=4*I(s.c)
Total fault current =Is.c(trans)+Is.c(Motor)
Is This Answer Correct ? | 2 Yes | 0 No |
A 3 phase motor operating off 415V system is developing 20Kw at an efficiency of 0.77 and power factor of 0.73. determine:- a)the line current. b)the phase current if winding are delta connected. c)the phase voltage if winding are star connected.
Merits & Demarits of Oil circuit & Air circuit breakers ?
what is meant by earth fault and how it happens....
how can we check a fully charged battery?
why select the 3 phase power supply system in electrical system.
APPLICATIONS OF SHUNT GENERATOR
Why insulation layer of a High Voltage cable is more than a current carrying cable?
In a star to star transformer can we use a common neutral for both star connected primary and secondary
hi i have a 400kva transformer i want to know the test i can use to check on it thx
why battery set is required for D.G.set?
what is the difference between b c d curves on mcb
what is the setting of locked rotor in HT motor ? (answer expecting in percentage)