there is a power transformer 66/11kV in delta-delta connection has 5 feeder com

there is a power transformer 66/11kV in delta-delta
connection has 5 feeder coming out from the secondary side.
One of the feeder in it normally loaded (loaded than other
feeder)and this feeder usually trips with double OCR causing
the bank transformer to trip. Now if the load of this feeder
is put on other transformer then that no problems occurs on
that transformer or the load. However normally all the
test(IR, PI, short ckt, open ckt,grounding test and other )
has been conducted for this but evertything transformer.....
I am not geting what is the actual problem...

Question Posted / ajit152007

2 Answers
5350 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

there is a power transformer 66/11kV in delta-delta connection has 5 feeder coming out from the sec..

Answer / parin patel

This thing happened dew to %Z of transformer.lesser the %Z current supplied by transformer will be more.
example:- there are two transformer
transformer 1: 66/11 kv,%Z= 5% ,15 kVA
transformer 2: 66/11 kv,%Z= 7%, 15kVA
If load is constant(same), current supplied by transformer 1 at 11 kv is more than current supplied by transformer 2 at 11 kv.

In your case ,you have to check the value of feeder current when it's supplied by two different transformer.in both case it might be different.

Is This Answer Correct ?

0 Yes

0 No

there is a power transformer 66/11kV in delta-delta connection has 5 feeder coming out from the sec..

Answer / k.prakashchandra

More data is required for analysis.If the transformers are
of same capacity and relays are identical ,interchange the
relays of transformer banks and watch.

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

what is the basic need of domestic loads 1- voltage 2- current

0 Answers

WHAT IS MEANT BY INSULATION CLEARANCE IN VACCUM?

0 Answers

what is the right method of laying cable tray if we are using EOT crane in shed, better is below or up

1 Answers

Which type starter is used for synchronous motor?

2 Answers Equate,

IS it possible for a feedbacksurge to travel over a wireless connection?

1 Answers HP,

Usually in the L & T make MCC feeders' power circuit,we have BMR after the MAIN CONTACTOR.,can we interchange their position, keeping the control logic same???

0 Answers

what is the difference between the voltage of 5 volts capacitor and and 5volts battery?

0 Answers

How i can decide that HVDC line is best for transmission.

0 Answers

Electrical Engineering

0 Answers Gamesa, Medha Servo,

What is installed in PAC that is control the humidity

0 Answers Sodexo,

if field breaker of generator is closed prior to its rated speed on a power generating unit. what will be the effect on generator, unit transformer and starting transformer.

0 Answers Power Plant,

what will be happen if we apply D.C supply to the transformer

14 Answers CCBPL,

For more Electrical Engineering Interview Questions Click Here