Wuhan Wei Austrian three high Electrical Equipment Co., Ltd. - WABC-H the multifunction (special) ratio test group Overview: multifunction ratio group tester can be used for power system three-phase transformer testing, especially suitable for the Z-winding Scott inverse Scott, transformer, rectifier transformer and railway electrical system, balanced transformer testing. The instrument uses a large-screen LCD, full Chinese menu and character printout, friendly interface, fully functional, easy to operate, the power system, transformer manufacturers and railway electrical systems ideal transformer turns ratio group polarity tester. The instrument input single-phase power, the internal use of the high-pressure side of the power module output to generate three-phase power transformer, three-phase transformer or other specialty transformer turns ratio error and group or phase angle of the test, the addition of this instrument can provide two-phase power output of a group, a difference of 90 °, inverse Scott transformer turns ratio and phase difference test. Features: 1 Auto generate stable amplitude, constant-phase three-phase or two-phase standard power supply. 2 from the transformer internal wiring way constraints, direct measurement of the high and low-voltage side of the voltage ratio and phase angle difference. 3 speed, the test time of a set of data for a few seconds. 4. Internal overcurrent protection. Test results from work frequency power frequency and amplitude of the fluctuations. 6. Particularly suitable for special transformer turns ratio and phase difference test. The true sense of the three-phase measurements. 8 with RS232 interface, convenient test automation requirements of manufacturers. Technical indicators: the ratio test: 1000 group test range: 1 to 12 ratio test accuracy: ± 0.2% reading phase difference test range: 0 ~ 360 ° phase difference resolution: 0.001 ° instrument power input: 220V ± 22V, 50Hz ± 1Hz instrument panel power outlet, power switch, reset button, rotate the mouse, to test power open and close indicator, LCD contrast adjustment knob, grounding terminals, printers, etc.. Test the power supply output terminal, the signal input terminal behind the instrument panel.