Electrical interview Question @ Answers.

Question 1 ):- What Is The difference between Isolator and Circuit Breaker?

Answers ):-    Isolator is a off load Device which is used for isolating the downstream circuits from Upstream circuits for the reason of any maintenace on downstream circuit.It is manually operated and does not contain any solenoid unlike circuit breaker. it should not be operated while it is having load.First the load on it must be made zero and then it can safely operated. it Specification only rated current  given.But circuit Breaker is onload automaticdevice used for breaking the circuit in case of abnormal condition like short circuit , Over load etc., It is three specification 1 is rated current and 2 short circuit breaking capacity And 3 is instantantneos tripping current.


Question 2 ):- Why In Earth Pin Is Big Than Other In (Power)plug Socket?

Answers ):-  Because Device Short Circuit Current  Direct Grounded.
                     Device Not Damage.


Question 3 ):-  Tell Me How Many Types Of  Earthing?

Answers ):-   Follwing Are Earthing Types. There are many types of earthing.
                    1)Piepe Earthing
                    2)Plate Earthing.
                    3)Chemical Earthing.
                    4)Spring Earthing.
What is the difnd Circuit Breaker?

Question  4 ):-  Write Types Of Circuit Breaker?

Answers ):-    Follwing Are Types Of Circuit Breaker.
                      1) Oil Circuit Breaker
                      2) Air Blast Circuit Breaker
                      3) Sulphur Hyxoflouride (SF6)Circuit Breaker
                      4) Vacuum Circuit Breaker

 Question  5 ):-   Continue...