GDZX ZXHQ-A+ CT, Руководство пользователя, Страница: 12 / 23

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measured on the circuits on the primary and secondary sides will be displayed on the
screen in real time. After the test, the transformation ratio and the polarity state will be
worked out automatically.
Polarity Discrimination Method: the homochromatic terminal of the tester is in-phase
terminal, namely P1 connected to P1 of CT, and S1 connected to S1 of CT. The polarity is
“-”subtractive polarity according to the test result.
During the test process, the controller will be displayed on the “Test” item and flashes
constantly unless escaped from the automatic test interface when the test is completed or
the test is interrupted manually through pressing down controller. After the completion of
the test, select “Print”
、
“Save”or “Print”.
Figure 24 Figure 25
2) PT Transformation Ratio and Polarity Test (connection mode shown in Figure 6)
Parameter Setting: as shown in Figure 25,
U-p : Setting range of output voltage: 0
～
2500V.
U-s
：
100V
、
100/√3V
、
100/3V
、
150V
、
220V.
After checking the correct wiring, Turn on the output. Move the controller to start item of the
transformation ratio and polarity test menu and press down the controller to start the test.
The equipment will automatically give the transformation ratio result and polarity
state(Figure 21).
Polarity Discrimination Method: the homochromatic terminal of the tester is in-phase
terminal, namely A and a are in-phase terminals. The polarity is “-”subtractive polarity
according to the test result.
During the test process, the controller will be displayed on the “Stop” item and flashes