Answer / soumik

if it is open circuited the whole current in the primary becomes magnetising current and a dangerously high voltage will appear across the secondary which will cause insulation breakdown and even something worse.so it,s secondary always kept shorted.

Answer / sandesh

Basic transformer formula:-
Vp x Ip = Vs x Is
Now our Vp > is very less (5 to 10V)
Ip > 2000A
Is > 1A
hence, Vs = (Vp x Ip)/Is
If Ct Secondary open circuited then Is = 0
therfore Vs = ( 5 x 2000)/ 0
Vs = ∞ i.e Infinity.
Which will harmful to Human Being.
Therefor CT Secondary never short circuited.

Answer / leo thomas

In CTs only a negligible part of the primary ampere turns
is used to magnetising the core .Remaining ampere turns is
counter balanced by secondary due to shorted.Once opening
CT in energised condition high voltages presents in
secondary causing faintal shock and the CT core will damage

Answer / joseph

if it is open circuited the whole current in the primary
becomes magnetising current and a dangerously high voltage
will appear across the secondary which will cause insulation
breakdown and even something worse.so it,s secondary always
kept shorted.

Answer / santosh89

yes above answers in context of not being open circuited are true.
But If the secondary impedence is not kept as low as possible(as during short circuit ), then there is a voltage drop across it , which result in a decrease in CTs accuracy.

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