Precautions for the use of partial discharge tester:

1. Before the partial discharge detector starts the test, the test personnel must check the circuit in detail and comprehensively to avoid wrong wiring. Test whether the grounding wire of the instrument is firmly connected to the grounding body. If the connection is not firm or the wire is kicked off by the foot when the head is pinched during preparation, this may cause personal and equipment accidents.

2. Avoid exposing the connecting wires to prevent corona discharge, especially for partial discharge tests with higher voltage levels. If necessary, thicken the high-voltage connecting wires and install an anti-corona cover to reduce the excessive field strength. Caused by corona discharge. The shielding cover should not be in contact with the porcelain skirt of the test product.

3. Under normal circumstances, during the test, the partial discharge of the test product during the withstand voltage and pre-boost is much larger than the normal value. At this time, the instrument will inevitably exceed the full scale. In order to prevent damage to the instrument, the coarse gain adjustment knob of the instrument should be turned counterclockwise by one or more steps, and the standard is not to exceed the full scale. When the voltage drops to the measured voltage, turn the coarse gain adjustment switch clockwise by one or more gears to record the measured value.

4. After the partial discharge tester is tested, the entire test system should be rechecked and corrected again to verify whether the scale factor is equal to the calibration factor corrected before the test, so as to prevent the test instrument or other links from malfunctioning during the test and the test results are incorrect. .

5. After the calibration of the electric quantity generator is completed, it must be disconnected from the high voltage end, and the power switch should be turned off, and the gain fine-tuning knob of the instrument cannot be adjusted anymore. Because the relationship between each two adjacent gears of the coarse gain adjustment switch is ten times, and the gears are indicated, the appropriate range can be selected according to the discharge capacity after boosting. When rotating counterclockwise, the range is expanded ten times for each step down; conversely, when clockwise, the range is reduced ten times.