Transformer Repair
Emergency On-Site & Workshop Bushing, Gasket, Radiator & Tap-Changer Repair
Rapid response repair of distribution and power transformers. Specializing in high-voltage bushing replacement, tank radiator leak welding, off-circuit and OLTC tap changer restoration, and silica gel breather overhaul.
Key Deliverables & Specifications
Emergency 4-Hour Response Team
Fully equipped mobile engineering vans ready for immediate industrial dispatch.
Original Spare Bushings & Gaskets
Ready stock of 11kV/33kV porcelain and resin bushings, gaskets, and conservator parts.
Pressure-Tested Radiator Leak Welding
TIG/MIG welding and pneumatic pressure testing to guarantee 100% leak-free operation.
Tap Changer (OLTC / OCTC) Repair
Precision contact resurfacing, transition resistor renewal, and timing alignment.
Engineering Scope & Capabilities
Emergency On-Site & Workshop Transformer Repair
Transformer breakdowns cause immediate and costly factory production halts. Trafo Engineering provides emergency 24/7 on-site and workshop transformer repair services across all industrial zones in Dhaka, Gazipur, Narayanganj, Chattogram, and nationwide.
Common Transformer Faults We Repair
- HV/LV Bushing Damage: Flashover flash marks, cracked porcelain, and burnt copper stem terminals.
- Radiator Fin & Flange Leaks: Micro-fractures, gasket failures, and corrosion holes sealed with certified MIG/TIG pressure welding.
- Tap Changer Malfunctions: Pitted contact points, broken Geneva gears, transition resistor burnout, and drive motor faults.
- Silica Gel Breather & Conservator: Oil contamination in breathers, punctured rubber diaphragms, and clogged breathers.
Step-by-Step Engineering Methodology
Emergency On-Site Fault Inspection
Visual inspection, winding insulation test, and leak source localization.
Component Disassembly & Repair
Replacing damaged bushings, welding radiator fissures, and overhauling tap contacts.
Nitrogen Pressure Holding Test
0.5 kg/cm² pneumatic holding test to verify complete seal hermeticity.
Dielectric Oil Top-Up & Re-Energization
Restoring filtered transformer oil and performing safe step-up energization.
Diagnostic & Calibration Instruments
| Testing Instrument / Apparatus | Capability & Standard Compliance |
|---|---|
| AC High Voltage Test Set | 50kV AC Dielectric Withstand Test Unit |
| Precision TIG Welding Unit | Miller Dynasty 280 TIG/MIG Pressure Welding |
| Winding Resistance Analyzer | Digital Micro-Ohmmeter (0.1 uOhm Resolution) |
| Nitrogen Purging Manifold | High-Purity Dry Nitrogen Pressurization Kit |
Frequently Asked Technical Questions
Book Transformer Repair
Get an on-site engineer dispatched or receive a formal branded quotation.
Available 24 hours a day for factory power outages and emergency substation repairs.