2
Figure 2
In this method, the adjustable high voltage power supply shall be provided, the voltage
signal input is connected to the end of the measuring meter for the testing transformer, one end
of the metal oxide arrester is connected to the high voltage, the other end is grounded through
the protector to be connected with the ground of the instrument and the ground of the high
voltage power supply. The AC signal input is connected to the lower end of the arrester and the
ground.
Boosting value: ≤10KV/1.5
≥35KV/
3
2. Online wiring diagram (live test)
Figure 3
In the online measurement, the voltage signal input is connected to the secondary side of
PT located at the same phase as the measured arrester, the current signal input is connected to
two ends of the arrester counter, and the ground terminal of the instrument is connected to the
lower end of the counter and is connected with the ground.
Refer to the above wiring method for correct wiring according to the field requirements.
V. Instrument Operation:
1. Connect the line and the instrument power supply, and turn on the power supply, then the
screen displays as shown in Figure 4.
