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

Categories >> Engineering >> Electrical Engineering
Suggest New Category

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

Question Posted / sajjad kabir

6 Answers
6934 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

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

Post New Answer

More Electrical Engineering Interview Questions

What is meant by term Back to back in HVDC transmission?

1 Answers SSC,

What is the difference between generator and turbo generator - related to power gereration

1 Answers

Why we use shunt coil in breaker??????????

7 Answers

can any one explain about when EB supply failed then how the load will transfer onto DG's step by step.

1 Answers

how many desk top computer can connect to a 25kva 3phase generator?

1 Answers

What is the difference in Line PT & Bus PT.

3 Answers Bhel,

Explain about Dubai electrical sysaem? Explain about Dubai drinking water system? Explain about Dubai Burj tallest building Electrical,Water.etc.. maintenance system?

0 Answers

if two transformers are placed parallel & both have fault impedance of 50KA will it increase or decrease show example?

0 Answers

what is the difference b/w winding insulation class and winding temperature class?

6 Answers Bhel, NDPL, NTPC,

what will be fault level of 11 KV , 2000 A ELECTRICAL SYSTEM?

4 Answers

what is meant by VDC ?where its applicable ?

2 Answers

What is effect of power factor on change in voltage

13 Answers APNPDCL, apspdcl, My Home Industries,

For more Electrical Engineering Interview Questions Click Here