Transformer rewinding · Budgam
A lightning-struck 100 kVA, back on the pole
An oil-cooled distribution transformer took a strike in a spring storm. We stripped, rewound and tested it rather than scrapping the tank.
- Where
- Budgam
- Rating
- 100 kVA
- Tested
- Ratio + IR
- Windings
- HV + LV rewound
Sample content — replace before launch
01Brought in
The problem
After a spring thunderstorm the transformer feeding a cluster of orchards and homes tripped and would not hold. The oil smelt burnt and the HV fuse had gone twice.
02On the bench
What we found
Insulation resistance on the HV side was near zero and the oil had carbonised. The core and tank were sound, so a full HV and LV rewind made more sense than a new unit.
03The work
What we did
Drained and filtered the oil, lifted the core and coil assembly out of the tank
Stripped the damaged HV and LV windings and cleaned the core laminations
Rewound both windings in copper to the original rating and insulation class
Dried the assembly, refilled with fresh transformer oil and sealed the tank
Tested ratio, insulation resistance and no-load current before dispatch
04Outcome
The result
The transformer went back on its pole with the same rating and a written test record, at a fraction of the cost of a new unit.
- Rating
- 100 kVA
- Tested
- Ratio + IR
- Windings
- HV + LV rewound
Sample content — replace before launch
I send them anything with a winding in it. What I value is the report that comes back — what failed, why, and what they changed — so I can tell my client straight.
05Photographs
From the job
Illustrative photographs of this kind of work.
Something similar? Tell us the rating.
A kVA or HP figure and what the job is — that is enough to start.