in 11kv/400v transformer when only one phase of 11kv supply fails what happens

Categories >> Engineering >> Electrical Engineering
Suggest New Category

in 11kv/400v transformer when only one phase of 11kv supply
fails what happens to sec voltage and why

Question Posted / guest

6 Answers
14061 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

in 11kv/400v transformer when only one phase of 11kv supply fails what happens to sec voltage and ..

Answer / sunit

from my point of view what i have seen physically .. if one phase of the 11kv line is faulty or jumper in transmission lines burnt out then there will be a low voltage in the secondary side of transformer,
actually DTR breaker in control room needs to trip the circuit but if the relay time settings are not accurate then it won't trip the circuit rather show low voltage in the secondary side...

Is This Answer Correct ?

2 Yes

0 No

in 11kv/400v transformer when only one phase of 11kv supply fails what happens to sec voltage and ..

Answer / k.prakashchandra

If delta/star ,one phase voltage will be normal and the
other two 50%, If star/star two phases normal and the third
missing

Is This Answer Correct ?

5 Yes

4 No

in 11kv/400v transformer when only one phase of 11kv supply fails what happens to sec voltage and ..

Answer / b.janardhana rao

I seen physically. One phase of 3 phases failure in HT. I said Example it will shows like RY - 415, YB-415, BR - 230Volts in seconary side. In that time two phases what loads are there is working. Remaining phase is not working. So 3 phase loads like pums, motors are not working. So we can put in ACB phase failure relay to be used. In that case the ACB breaker wads tripped.

Is This Answer Correct ?

1 Yes

1 No

in 11kv/400v transformer when only one phase of 11kv supply fails what happens to sec voltage and ..

Answer / suresh

HT side one phase fails means secondary side unbalance voltages coming ,that means upstream side breaker will trip within time limit.

Is This Answer Correct ?

0 Yes

2 No

in 11kv/400v transformer when only one phase of 11kv supply fails what happens to sec voltage and ..

Answer / technical1210

11kv/415v T/F is designed for 3 phese supply , if 1 phase
fails then t/f will trip automaticly and no voltage will be
avaliavle at secondary side.

Is This Answer Correct ?

11 Yes

17 No

in 11kv/400v transformer when only one phase of 11kv supply fails what happens to sec voltage and ..

Answer / m.prasath

Here,
Primary voltage is 11kv.
Secondary voltage is 400v.
If primary voltage is failed means nothing will happen in secondary side. ie almost zero in secondary side in transformer....

Is This Answer Correct ?

6 Yes

12 No

Post New Answer

More Electrical Engineering Interview Questions

In a tap changing transformer where is the tap connected, is it connected in the primary side or secondary side?

0 Answers

what is the principle of motor

6 Answers

Why does an induction generator is preffered as compared to synchronous generator in especially a wind energy power production project?

0 Answers

why induction motor's p.f 0.8

0 Answers Suzlon,

Does the motor power displayed on the Motor name plate is the mechnical power motor delivers or it is consumed power from the system?

2 Answers

what is the standard values(Megger test) of resistances between L&N,L&E and N&E for a system on IEE regulations?

0 Answers

how to check the continuity of a cable with a megger

4 Answers Metro,

can you give me some names of projects which can be used in our daily life & which is having medium cost?

1 Answers

freuency meter

1 Answers

what will be the magnetizing current in the testing of 27 MVA transformer?

1 Answers

is it necessarry to charge the battery of ups always??

3 Answers

As a good company employee, can you report your supervisor to the company management if he or she is going against the company interest in his or her actions?

3 Answers

For more Electrical Engineering Interview Questions Click Here