Professional Transformer Service
Electrifying solutions for a bright future in power infrastructure.
Transformer Loading & Unloading
- Safe loading and unloading of transformers (01–500 MVA) using cranes, hydraulic trailers, and rigging equipment.
- Pre-loading inspection of packaging, skids, and protection systems to ensure transit integrity.
- Precise positioning and alignment at site with level-checking instruments and temporary supports.
- Unpacking and removal of transit braces, wooden supports, and protective coverings following OEM procedures.
- Verification of accessories (bushings, radiators, OLTC) condition and secure mounting points post-unloading.
- Documentation of process with photographs, condition reports, and handover checklists.
- Compliance with lifting plans, load charts, and safety protocols per IS 1180.
- Coordination with transportation agencies for seamless handoff to site erection phase.
Transformer Testing, Erection & Commissioning
- On-site testing of transformers before energization and after maintenance.
- Functional verification of mechanical and electrical systems, protection, and interlocks.
- Progressive and full-load testing to validate capacity, thermal performance, and voltage regulation.
- Testing as per IS 1180, IS 1812, IS 6681, and IEC standards with complete reports and compliance certificates.
Oil Filtration, Dehydration & Regeneration
- Advanced oil purification removing moisture, dissolved gases, and contaminants using high-vacuum systems.
- Oil regeneration via adsorption and vacuum techniques to restore dielectric strength.
- Portable on-site filtration units for in-service transformers, minimizing downtime.
- Environmentally responsible approach that extends oil life and reduces waste.
Low Frequency Heating (LFH)
- Specialized LFH for transformer windings to improve insulation performance and reliability.
- Significant improvement in insulation resistance (IR) values.
- Optimization of Tan Delta and capacitance across windings.
- Reduction of moisture content within insulation and oil-impregnated components.
- Precise controlled heating cycles tailored to transformer design and voltage class.
OLTC Inspection, Repair & Overhauling
- Complete OLTC inspection covering contacts, selector switches, diverter switches, and drive mechanisms.
- Cleaning, refurbishment, and replacement of worn components for smooth tap-changing performance.
- Repair and overhauling of in-tank and flange-mounted OLTC designs.
- Full disassembly and reassembly with documentation and performance verification.
Internal Inspection of Transformer Windings
- Visual inspection of windings, core assembly, and internal structure.
- Checking for displacement, deformation, carbon tracking, or insulation damage.
- Verification of mechanical tightness of clamps and core bolts.
- Documentation with photographs and inspection reports.
- Recommendations for corrective actions before oil filtration, LFH, and final testing.
