Motor

Transformer Oil Temperature Alarm Activates Frequently

Symptoms

Transformer oil temperature alarm operates repeatedly during normal loading conditions.

Likely Cause

Overloading, cooling fan failure, blocked radiators, low oil level, or high ambient temperature.

Testing Procedure

1) Check transformer loading. 2) Verify cooling fan operation. 3) Inspect oil level gauge. 4) Measure oil temperature. 5) Inspect radiators for blockage.

Tools Required

Infrared thermometer, clamp meter, thermal camera

Safety Precautions

Follow lockout/tagout procedures. Maintain safe clearance from energized equipment.

Step-by-Step Solution

1. Restore cooling fan operation. 2. Clean radiators. 3. Top up transformer oil if required. 4. Reduce load. 5. Verify alarm settings.

Prevention

Perform annual cooling system inspections and oil testing.

Engineering Notes

High oil temperature accelerates insulation aging and reduces transformer lifespan.