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.
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Answer Posted / 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 |
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