TTR Tester
- GDBC-901 Single Phase and Three Phase Transformer Turns Ratio TTR Tester
- Three Phase Transformer Turns Ratio Test Set
- Portable Transformer Turns Ratio Testing Equipment 3 Phase TTR Tester
- GDB-P Three Phase Transformer Voltage Ratio Tester Turns Ratio TTR Meter
- GDB-IV Battery Charge Transformer Turns Ratio Tester Three Phase Transformer Excitation Current Tester
- GDB-D Z Type Three Phase Transformer Turns Ratio Meter