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what is the difference between Ith & Iu rating in MCCB. Particularly on SACE ABB Circuit Breaker?
2 18144I 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?
2263What is the difference between sensitive earth fault and restricted earth fault in power transformers?
4 52574what is the reason for drop in freq. from 50 hz at generating side to 49.8 ,49.6 etc.at receiving side???
2 4454how 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 16518Post New Electrical Engineering Questions
What are the function of different components of servo motor?
what is the voltages using in movie theaters??? why ??why not other??
For a stable system, where should the poles of a system be in a root loci plot?
Explain about retrofitting of machine tool.
do anyone out there know where to find a compleete list on acronyms/abbreviations used in offshore electric engineering. MCB - Micro Circuit Breaker, MCCB-Mouldes Case Circuit Breaker, ELCB-Earth Lekage Circuit Breaker, ELMCB- etc.....
what are the interview question asked in wind mill about electrical
pre arcing time of ehv breaker
why dimmerstate always connected in star connection? what will happen if it connected in delta?
If we need 4c× 50mm sq cable but it's not available so we can pull 4c×25mm sq two cables?
hii this is ranjith from hyd... i want to know what type of questions they ask in interview...and hw the interview will go..? what subjects thay ask specially for electrical engg students?
how can i improve the power factor in domestic (230v)
how to calculate the conductor size for certain KV transmission line and distribution line?
what is working process of star delta controlling circuit ?
How many double suspension hardware fittings are required on a double circuit transmission tower?
How will polarity test of Dy5 Transformer ?
