If
the fault current is 2000 amp, the relay setting at 50% and CT ratio is 400/5,
then the plug setting multiplier will be
25
10
50
None of the above
25
Given
:Fault current = 2000 amp
Current
Transformer (CT) ratio = 400/5
Fault current at secondary side of CT
Pick up current = Rated current of CT x Current setting
= 5 x 0. 5= 2.5A
Now, plug setting multiplier is given by,
Note
: Plug Setting Multiplier is unit-less quantity.
Hence,
the correct option is (A).
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