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.

Could you measure voltage in series?

0 Answers  

How can I calculate the trnaformer effciency at different loading condition?

2 Answers  

How can we determine or find out the proper size of any cable if nothing is mentioned on it.Calculation of size in Sq.mm???

1 Answers  

Any formula to calculate neutral current in 3 phase 4 wire system

1 Answers  

What type of DC motor would you see for a lift?

0 Answers   Ericsson,

Can you tell me more about pu systems (per unit systems )calculation in large power systems? how to get the base for voltage and power in generator, transformator and transmission lines?

0 Answers  

What will be the effect of circulating current in HT xlpe cable when both the armour ends are grounded. Will the termination fils after some time in case of 33 kv supply.

0 Answers  

WHAT IS THE USAGE OF Buckoltz relay IN POWER TRANSFORMER AND AND HOW ITS FUNCTIONS?

3 Answers  

1 Kva = How many KW

3 Answers   Reliance,

sourse is 66 KV / 350 MVA, transfarmer is 1000 KVA 6.6 / 0.415 kv, iF fault is 28.75 MVA on 0.415 KV Bus then calculat the Transfarmer Impidance

0 Answers  

what is the maximum current carrying capacity of a 95 sqmm cupper under ground cable laid partialy in land and partialy in ground?

4 Answers  

how the diesel generator maintain the rpm when the generator loaded varies from 10% to 70% immediately?

3 Answers