Transformer Turns Ratio Tester
Compares measured turns ratio with nameplate and tap values; deviations can point to tap-changer, connection or winding issues that need further investigation.
Measurement method
With the transformer isolated and safe, each tap is measured for ratio, phase relationship and deviation. Findings are assessed against the nameplate and previous records.
Field applications
- Pre-commissioning ratio verification
- Tap-position comparison
- Post-fault winding and vector-group assessment
