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what is the difference between Ith & Iu rating in MCCB. Particularly on SACE ABB Circuit Breaker?
2 18126I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?
2259What is the difference between sensitive earth fault and restricted earth fault in power transformers?
4 52564what is the reason for drop in freq. from 50 hz at generating side to 49.8 ,49.6 etc.at receiving side???
2 4446how the rotating magnetic fieldis produced in induction machines??? give the correct explanation.is there any mathematical expression for the same?
1 3004If DC supply is given to a transformer it may a) Work b)Not Work c)Give lower voltage than the rated voltage on secondary side. d)burn the winding
12 16495Post New Electrical Engineering Questions
0.5,1,1.5,2.5,4.0.6.0,10,16 square mm electrical wires how much take maximum current in 50htz
What is the function of electron gun assembly used in crt?
when 20hp 3 phase motor start no load condition in star or delta connection.find current and write formula.(tariq)
when the time of backcharging the transformer three phases only enough or three phase with neutral is must.from these which one is the best one.
What range of speed can you get with the field control method of speed control of d.c. Shunt motor?
What is mean by spike arrester(Voltage Operated)
What is kvar?
If the Brush of DC motor is shifted by 90 deg, then what happens to voltage and torque? Both voltage and torque are zero. how to justify the answer?
why constant voltage transformer should be start without load? and if started then what will happen?
what is the difference between changer, converter and transformer?
What is primary and backup protection?
in power generator normaly voltagr betwween esth to neutral is 0 but my work place generator show the volatge is 60v any body know why? thanks
how to compare with Relay settings for HT< panels, RMU panel, and PSS CSS transformer?? 1) Load amps, 2)Tripping time, 3) CT ratio, 4)Cable size 5) Transformer KVA rating 6) transformer full load amps
explain the functions of main isolation switches
while starting a liquid starter ,is there any volage drop on water/soda on tank.can we touch the tank on starting?
