Why secondary of a CT in a power system acts as an open
circuit after core saturation?
Answers were Sorted based on User's Feedback
Answer / arpita
Under normal operating condition m.m.f or ampere- turn
both primary and secondary oppose each other. When
secondary of C.T is open circuited then there is no
demagnetiging ampere-turn to oppose the primary ampere-turn
and therefore, the primary ampere-turns now become active
in producing a very high flux density in the core which
result in very high inductance e.m.f. in the secondary
winding.
This high induced e.m.f. is likely to cause
a) Overheating of core
b) Breakdown of insulation
c) An electric shock to the attending personnel.
For these reason secondary of C.T in power system not act
as an open circuit.
Is This Answer Correct ? | 5 Yes | 1 No |
Answer / gajanan
there are 2 possibilities
1.if we keep secondary of ct open, then only primary mmf
will be present in core which saturates the core
2.in fault condition due to high frequencu current core
saturates means permeability of core decreases very much as
good as wood
Is This Answer Correct ? | 0 Yes | 1 No |
how to design domestic earthing pit and earthing wiring?
what happens when ac supply is given to D.C motor.
What are the different types of controllers?
How we select the vector group of 3phase power transformer?
what is FET
What is the differance between vacuum breaker and vacuume contactor
If the load of transformer is getting more than its rating,,,than how to overcome this problem? Suppose thee rating of transformer is 315kva and the load is going beyond than the rating say around load: 352kva... Than how can we solve this problem without deducting the load.
are there rmu for 3 transformer?
where to use 3.5 core and 4 core cables, will this vary for type of loads
if 40 watt bulb has higher resistance then a 100watt bulb then according to joul farmula p=I^2R the 40 watt bulb more power consume then 100 watt bulb.
What is dynamo?How it works and what is the function of dynamo in a DG.
Hello sir i m student of gtu .what is idp.