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what is the difference between Ith & Iu rating in MCCB. Particularly on SACE ABB Circuit Breaker?
2 18325I 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?
2322What is the difference between sensitive earth fault and restricted earth fault in power transformers?
4 52819what is the reason for drop in freq. from 50 hz at generating side to 49.8 ,49.6 etc.at receiving side???
2 4553how the rotating magnetic fieldis produced in induction machines??? give the correct explanation.is there any mathematical expression for the same?
1 3087If 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 16847Post New Electrical Engineering Questions
how is the connection of a 3 phase ct trivector meter done on a pole mounted transformer
c++ write a program to use a fuction call "max"which accepts an intger arrey of size5.as an arrument and return the larger and smallest of the arrey to main without changing. the original changing of the original position of the element of the arrey.
what is the best transformer oil breakdown voltage?
how generator avr give to the input?
In aerodynamic turbines which element is NOT there a.stator b.compressor c. Fuel intake system d.fans
what is meant by IGBT how they differ from tyristor ?
Why 1/3 is used in symmetrical components?
Give some example of fault limiting devices?
what is the chemical name and formula of refrigarent R-134a.
Why neutral cable carry current.
What is the normal phase difference between the voltage and the no-load current in a transformer?
Advantages/Disadvantages of earthing of neutral bus on MSB instead of separate neutral earthing for transformer/DG sets feeding to MSB
I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?
how calculated Transformer losses.
transformer spections :: input voltage 0-110-230v; output volage 0-10-12-14v; amp=3A using CRNO CORE, capcaity=50VA primary turns = ? ; secondry turns =?
