Common transformer testing instruments include:
1. Transformer winding resistance tester
2. Transformer winding insulation resistance tester
3. Transformer turns ratio tester
4. Transformer on-load tap changer tester
5. Transformer oil temperature gauge
6. Transformer oil moisture content tester
7. Transformer partial discharge tester
8. Transformer AC withstand voltage tester
9. Transformer DC withstand voltage tester
10. Transformer power factor measuring instrument
11. Transformer reactive power compensation device detector
12. Transformer short-circuit impedance tester
Different types of transformer testing instruments have different testing functions and can be used for different aspects of transformer testing and detection.
