on 22.03.2015 at 17:15hrs Y phase 66kV class Power Trf-2 Current transformer has

on 22.03.2015 at 17:15hrs Y phase 66kV class Power Trf-2 Current transformer has flashed over and oil came out. The failed CT has been replaced on 24.03.2015 at 13:15hrs and the Trf has been charged in presence of RT Hassan after conducting the pre-commissioning tests. On the same day at 17:00hrs the commissioned CT has again flashed over and immediately the Trf has been isolated from power supply. It is confirmed the secondary is not opened and checked the earth integrity and is found ok. Here what would be the reason for the CT failure?

Question Posted / sri

2 Answers
3232 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

on 22.03.2015 at 17:15hrs Y phase 66kV class Power Trf-2 Current transformer has flashed over and oi..

Answer / dheeraj.yadav

It may be cause due to meter internally circuit open the secondary of ct in meter.due to circuit problem.

Is This Answer Correct ?

0 Yes

0 No

on 22.03.2015 at 17:15hrs Y phase 66kV class Power Trf-2 Current transformer has flashed over and oi..

Answer / k.prakashchandra

Lightning stroke or metering core open circuited due to operation of faulty rotary phase selector

Is This Answer Correct ?

0 Yes

1 No

Post New Answer

More Electrical Engineering Interview Questions

If single phase voltage level is 230V than why three phase voltage level is not 660V ?, but it is only 440V.

16 Answers BSNL, DOS, EFS, HMT, L&T, TCS, ThyssenKrupp,

Is single load(eg: three phase motor) having all the components like positive,negative,zero sequence components during fault condition?

0 Answers

Why syn. Generators are used for the production of electricity?

0 Answers

what is dead tank CT AND what is live tank CT

2 Answers TATA,

How to decide the rating of CBCT? We have 6.6Kv switchgear & having 50/1 cbct ,i want to know how this 50/1 A came? On what basis we decide CBCT reting?

1 Answers Cross,

Why motor initial starting current is high?

9 Answers Pennar,

how can we decide where we have to DYn11 or other vector group transformer

4 Answers BSL, Knight Frank, Security Printing and Minting Corporation of India Limited,

testing of transformer

1 Answers Vijai Electricals,

WANTCONTACT NUMBER & EMAIL/ WEBSITE TO CONTACT THE SECRETARY,MADHYA PRADESH LICENSING BOARD(ELECTRICAL),K- BLOCK,3RD FLOOR,SATPOODA BHAWAN,BHOPAL

0 Answers

If I want to replace a 26KW Slip ring Motor with a Squirrel Cage motor & Drive (for a Hoist Application). How can I approximate the Motor & Drive HP required in new Setup.

0 Answers

What is zero of the system?

0 Answers

what is the highest voltage for transmitting electrical power in india

5 Answers

For more Electrical Engineering Interview Questions Click Here