GDB-D Three Phase Transformer Turns Ratio Tester

GDB-D Three Phase Transformer Turns Ratio Tester

General Information

GDB-D Transformer Turns Ratio Tester is specially designed for three-phase transformer in power system,

especially for transformer of type Z winding and other transformers whose zero-load current is relatively high.

The tester has wide testing range, fast testing speed, favorable repeatability, flexible data processing, convenient connection, complete protection, easy learning and convenient operation


  • Applicable to transformers connected in Z type.
  • Two output voltages are optional and applicable to transformer whose zero-load
  • current is relatively high.
  • Wide testing range and the highest transformation ratio may reach 10000.
  • Automatically calculate tap position.
  • Fast speed, which is only 18 seconds for three-phase
  • Favorable repeatability.
  • Automatically save 99 data at most.
  • Flexible data processing, including retrieval, print, transfer to U-disk, delete and upload to PC computer for testing.
  • Functions of transformer short-circuit protection and interturn short-circuit
  • Protection functions. If there is short circuit, relevant information will be displayed on the LCD screen.
  • Small size and light weight.


  • Turns ratio range: 0.8-10000
  • Group testing range: 1-12
  • Turns ratio accuracy: 0.2% (180V: 0.81000); 0.5% (180V: 100010000) ; 0.2% (10V: 0.8200)
  • Turns ratio resolution: 0.0001
  • Power input: 220V±10%, 50HZ±1Hz
  • Working temperature: -20℃~40℃
  • Relative humidity: ≤85%, no condensation
  • Dimension: 325mm×278mm×188 mm
  • Weight: about 6.9kg



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