Answer / sunthosh080

Usually the mechanical life of the contactors will in
millions times and they are very easy to control and
operate. Other breakers are large in size and difficult to
control when compared. Also the opening & closing time will
be very less for contactors and in case of any short
circuits contactors can be easily repaired.

Answer / ashwani malhotra

The main function of magnetic contactor is to prevent
accidently operation after the power failure & again
recovery. Because as soon as power fail the holding coil
release the contacts and it will not operate untill someone
complete the hold circuit again .

Answer / 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

Answer / aamir ansari

the main function of magnetic contactor is control and CB is to protect generally the control is near to the load so it will protect only till the control panel and the CB is protecting whole (From power panel to the load) and also serving as secondary protection for load.

Answer / alok

magnatid contactor are use as aux. contact not for main arc
quanching chamber & medium so contector use in controll
ckt. not in power ckt.

Define open loop control system.

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