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What is the cause for a blown fuse in one phase of primery
side(HV) of a three phase transformer( 4169v-460v) in the
time of closing its supply breaker.
There is no load on the secondery side of the transformer
in this moment.

Answers were Sorted based on User's Feedback



What is the cause for a blown fuse in one phase of primery side(HV) of a three phase transformer( ..

Answer / engr.abdurrahim

As your Question, I think in your transformer is having
interturn fault or single phasing or may be LG
fault.Without load if any fuse blown means connected things
(Transformer)itself having problem.

Solution:
Do the Meggaring and check insulation between, phases at HV
side,LV side,
Check insulation between phase to neutral, Phase to earth.
Check Earth resistance also.

Is This Answer Correct ?    5 Yes 2 No

What is the cause for a blown fuse in one phase of primery side(HV) of a three phase transformer( ..

Answer / pillay

It could be just high inrush current,
incorrect fuse size or a defective fuse
in the first place.If it recurs than
further investigations should be taken.

Is This Answer Correct ?    3 Yes 0 No

What is the cause for a blown fuse in one phase of primery side(HV) of a three phase transformer( ..

Answer / niranjan

Due to high inrush of current or there may an inter turn
fault on ther primary side of the transformer

Is This Answer Correct ?    1 Yes 2 No

Post New Answer

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