Automatic Substation Transformer Turn Ratio Meter TTR Ratio Tester
GDB-IV Transformer Turns Ratio Tester is suitable for measuring variable ratio phase of power transformers, phase-shift rectifier transformers, Scott transformers, reverse Scott transformers, etc.
The internal power module in the tester generates the three-phase power or two-phase power, which is output to the high voltage side of the transformer. Then the high voltage and low voltage are sampled at the same time. Finally, the group, ratio, error and phase difference are calculated.
Main Features
- 7inch touch screen, full menu.
- It generates 3-phase power or 2-phase power, and output to HV side of transformer.LV side and HV side are sampling at the same time, and group, turns ratio, error and phase error are calculated at last.
- The instrument output 2 voltages, which enhance the adaptation of different voltage grade transformer.
- For the transformer with tap changer, after rated parameter is set, the position of tap changer, tap changer ratio of current position can be determined automatically when measuring.
- Fast speed, testing time for one group data is 10s.
- Three-phase(120°) or two-phase(90°) power supply with stable amplitude and constant phase.
- With over-current, over-voltage protection function, over-heat function, reverse connection protection function.
- With 2pcs USB port, one for online and it can be controlled and measured by PC, data can be uploaded and saved by EXCEL file, one for inserting USB disk to save data.
Technical Index
Voltage ratio test range: 1-10000
Group test range: 0-11
Voltage ratio test accuracy
1-500: 0.1% High voltage
500-2000: 0.2% High voltage
2000-10000: 0.5% High voltage
1-100: 0.2% Low voltage
100-500: 0.5% Low voltage
Voltage ratio resolution: 0.0001
Angle accuracy: 0.1°
Angle resolution: 0.01°
Accuracy of current measurement: 1% FS+2digits
Power Input: Lithium battery 12V 10Ah
Dimension: 387*175*379mm
Weight: 25kg
Operating temperature: -20ºC-40ºC
Relative moisture: ≤85%, no condensation
Pictures
Test Results
Audited Supplier 
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