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.

Why the transmision line are 11,33,63,132kv?

10 Answers   Power Grid,

what is the role of reactive powerin transmission and distribution?

3 Answers  

what main difference betwenn invetter & ups & major difference

2 Answers   ABB,

what is meaning of sympathetic tripping with respect to relays and give the values for current carrying capacities for copper and aluminium cables from 16sq mm to 500sq mm

1 Answers  

Name the test signals used in control system

0 Answers  

What is transient Phenomenon?

0 Answers  

The capacitive reactance of a capacitor of 1/(2(PI)) F at 10^3 H is

0 Answers  

what is the working principle of UPS?

2 Answers  

how many units will 100 kvar capacitor consume for one day?

2 Answers   Philips,

PLEASE EXPLANE WHAT IS " MOSFET AC CONVERTER"? WHERE AND HOW IT IS USED?

2 Answers  

. Is there a simple method to measure the horsepower of a small motor (1-3 hp) for a non-technical person

2 Answers  

the winding of Generator and Motor is star or in delta ? and why

0 Answers