In Transformer testing at Shop test we normally test for vector group, open ckt

In Transformer testing at Shop test we normally test for
vector group, open ckt.,short ckt. but what are the other
test performed for transformer once it reaches at site.For
e.g:if the transformer is dry having rating 1000KVA?

Question Posted / rk

2 Answers
4391 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

In Transformer testing at Shop test we normally test for vector group, open ckt.,short ckt. but wha..

Answer / guest

1. Insulation Resistance Measurement
a . For LT systems, use only 500V or 1000V Megger
b. For MV & HV systems, use 2500V or 5000V Megger
c. Remove Earth from Transformer neutral
2. Winding Resistance Measurement
R-N AND r-n
Y-N y-n
B-N b-n
3. Magnetic Current Test
Applied Voltage : RY YB BR
Measured Current : R Y B
4. Magnetic Balance Test
5. Vector Group Confirmation.
6 . Short Circuit Test and Differential Stability.
7 . REF Stability Test
8. Cooler Circuits.
9. Auxilliary Protection Circuits

Is This Answer Correct ?

2 Yes

0 No

In Transformer testing at Shop test we normally test for vector group, open ckt.,short ckt. but wha..

Answer / brahma

Also Double voltage double frequency, if customer ask impulse

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

What is difference between Dy11 & Dyn11 vector group transformer. Can both these transformers operate in parrallel.

5 Answers Jaypee, JOY,

what happens when a DC supply is given to AC motor?

9 Answers Areva, ISMT,

what is the advantage and disadvantage of billing in kwh and kvah by electricity board .

6 Answers Nespak, NTPC,

why is used for starters for staring motors?

6 Answers Amrapali, L&T,

What are the insulation standerds for eg H clase and how many insulation standerds are there and its standerds??????

0 Answers

1.What is isolators and bus bars?give answer in details

2 Answers

Why hydropower stations are preferred solution for meeting peak loads in grids?

0 Answers

what is interpose vt where it is used and y it is used?

0 Answers

I need the recommended size for a 3 phase transformer at 13.8 KV Primary and connected loads of 3000 kVA at 4200 volts and 2375 kVA @ 480 volts AC.

0 Answers Duke Energy,

how to syncronize two dg sets

3 Answers

advantage of using 110v than 230v

1 Answers NTPC,

could i arrange a faulty and healthey battery bank togather in parallel , if your ans is not then why?

3 Answers

For more Electrical Engineering Interview Questions Click Here