what is the working principle of contactor and conditions of
normal open and normal close on it?
Answers were Sorted based on User's Feedback
Answer / abhilav vishwakarma
A contactor works on the principle of Electro-magnetism. IT
comes under the category of switch gears and all the switch
gears performs the same function of Switching.
A contactor consists of mainly 2 parts-Fixed and movable
jaws. the fixed jaws are firmly connected with the circuit
and is a provided with a COIL having movable jaw as soon as
current is allowed to flow from the circuit the COIL gets
charged and due to electromagnetic effect it attracts the
movable metal jaw, thus the circuit is complete with the
CONTACT provided by the movable jaw. this is the
functioning of contactor. When current through the circuit
ceases , coil demagnetises and movable jaw is pulled apart
Is This Answer Correct ? | 79 Yes | 9 No |
I am having a DG set.The 415 V from Generator is step up to 460 v and then the same is used for Induction furnace. before Step up, I am connecting LT load to my factory use. When Induction furnace is in service from DG, when i try to start a motor, the generator is tripped.Please tell me the reason.
what is the change over switch ,switch disconnector ,bypass switch and switch disconnector fuse unit?
Which standard i will refer for size of earthing conductor for equipment? (Eg:415V Switchgear, MCC, DB shall be 50x6mm GI flat)
Why capacitor bank does not require in DG Set?
What is CCM in Electrical ? where can we use this material?
when the size of the cable used for the ht voltage is 300sqmm then what is the size of the conductor of each phase
describe your self.
what happen to the voltage and current in all phases when an earth fault occur in a phase in three phase three wire system(delta connected)...
1. Synchronization is not required A. Thermal B.Hydel C.Wind D.Nuclear
2 Answers APGenco, Birla Power,
What is a commutator?
Fot testing new star-delta 132 kw motor in electrical worshop.we should check in star or delta connection as we do not have higher capacity cable in worshop?
i've iocl interview.. if you know the interview process please give me information..