why do we use magnetic contactors ?circuit breakers are not
enough?
Answer Posted / amit biswas
magnetic contractor is more of a sequence swiitcing device
while later is aprotection device.
even the contractrs on papers can perform the operation of
a cb.But to my cognizance I had never seen any contracor at
HT level
every time a c b operates it required to chare the spring
manually (or motor but with manual interferance) which is
not in case of contractors
Is This Answer Correct ? | 9 Yes | 10 No |
Post New Answer View All Answers
What is the difference between security constraint unit commitment and security constraint optimal power flow?
What is meant by a stray loss of a induction motor??? What is the equation to find it
What the main causes of transient interruptions on Over-Head Distribution Lines?
I have made a 3 phase thyristor full bridge rectifier. But at the moment it is working only for the half bridge operation. Both the half bridges are on operation separately but when i put it into full bridge operation the oscilloscope output is zero. I rechecked that the pulses are correct for each thyristor. what could be the possible reason for this?
if negative of DC supply used and positive is grounded through EGB, and if ELCB used in the system then is it sense the positive volatge and get tripped is it possible?
how to avoid electrical shock how capacitor store charges wat are the speed control of induction motors state faradays law flemings left hand rule what is rotary converter wat is transmission and distribution what are the sources of energy abrevation of acb,vcb,sf6,igbt what is output equation of transformer which test copper iron and iron loss are calculated what is eddy current draw a single line diagram (10 marks) draw direct online starter(10 marks)
what is the acceptable limit value for Desolve Gas Analysis/
WHAT IS counter flux IN CT?
Name the types of motors used in vacuum cleaners, phonographic appliances, vending machines,refrigerators, rolling mills, lathes, power factor improvement and cranes.
How to check the cable fault / hv test of transformer cable.
hello!my name is sheikh iam preparing for indian engineering servieces,please send me the old question papers..to sheikhshaazforjobs@gmail.com
A ray hit a smooth regular surface at an angle of 20 from the normal. Calculate : 1. The angle btw the incident and reflection ray. 2. The angle of deviation.
There are a trformer and an induction machine. Those two have the same supply. For which device the load current will be maximum? And why?
How much earthing frequency is capable?
How grounding is different than earthings?