Visual Inspection
Regular inspection helps identify oil leaks, rust, damaged bushings, loose connections, or abnormal noise and vibration.

Oil Testing and Maintenance
Transformer oil (for oil-filled units) should be tested for dielectric strength, moisture content, and contamination. Oil filtration or replacement may be required to maintain insulation quality.

Electrical Testing
Tests such as insulation resistance, winding resistance, turns ratio, and load checks help verify transformer health and performance.

Cooling System Check
Radiators, cooling fans, and oil circulation systems must be cleaned and checked to ensure effective heat dissipation.

Bushing and Terminal Maintenance
Bushings and terminals should be cleaned and tightened to prevent flashovers and overheating caused by poor connections.

Earthing and Protection System Inspection
Proper grounding and protection devices such as surge arresters and fuses must be inspected to ensure electrical safety.

Load Management
Monitoring transformer loading helps prevent overloading, which can reduce transformer life and cause insulation damage.