We have AC-transformer 110/13.8kv,40MVA.If DC-Voltage=110kv is applied in its

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We have AC-transformer 110/13.8kv,40MVA.If DC-Voltage=110kv
is applied in its primary what will happen?

Question Posted / sajjad kabir

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We have AC-transformer 110/13.8kv,40MVA.If DC-Voltage=110kv is applied in its primary what will ha..

Answer / shivashankar

It will act as short circuit, bcoz the rate of change of
flux will induce voltage in sec,whereas in Dc there is no
such phenomenon ..R=V/I..if V=0 R=0/i ultimately R=0......It
nay tend the transformer to overheat ...

Is This Answer Correct ?

10 Yes

1 No

We have AC-transformer 110/13.8kv,40MVA.If DC-Voltage=110kv is applied in its primary what will ha..

Answer / guest

Due to the high short circuit current (110KV/0 ohms) the
primary winding will burn..

Is This Answer Correct ?

7 Yes

0 No

We have AC-transformer 110/13.8kv,40MVA.If DC-Voltage=110kv is applied in its primary what will ha..

Answer / adel

no voltage produced in secondry winding

Is This Answer Correct ?

9 Yes

6 No

We have AC-transformer 110/13.8kv,40MVA.If DC-Voltage=110kv is applied in its primary what will ha..

Answer / vasudeva rao

according to the faraday emf is developed in the winding
when there is a rate of change of flux is present.
(E=dΦ/dt ) i.e time variant flux is present. but in d.c
current is constant i.e time invariant. here flux is
constant. so differentiation of constant is zero. i.e
dΦ/dt=0. i.e e=0.

it means winding gets serious short circuit.

Is This Answer Correct ?

1 Yes

0 No

We have AC-transformer 110/13.8kv,40MVA.If DC-Voltage=110kv is applied in its primary what will ha..

Answer / mohammad saber

for any dc value the the transformer insulator will ichrist
because of the direct current ,and as we know the
transformer operation theory work on the the alternating
current generate the mutual between the transformer windings

Is This Answer Correct ?

6 Yes

6 No

We have AC-transformer 110/13.8kv,40MVA.If DC-Voltage=110kv is applied in its primary what will ha..

Answer / prabhakar

since the primary winding is of thin guage with large no.
of turns as compared to its secondary winding i.e.,the
resistance of the primary winding will be more and so that
no more short circuit happens with the winding and
eventually no more secondary voltage appears at the
secondary.(as per the basic of transformer principle)

Is This Answer Correct ?

1 Yes

2 No

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