The DC high-voltage power supply utilizes high-precision, high-stability high-voltage electronic components and high-frequency high-voltage technology. It features overcurrent, overvoltage, and overtemperature protection, zero-position start-up protection, high-voltage side voltage metering, and real-time display of residual voltage and current.
Individuals operating the DC high-voltage power supply must possess a "High-Voltage Test Certificate." Before operating the instrument, it must be securely grounded. Two prominent disconnect points must be installed before the power supply cable is connected to the fault detector. These must be disconnected when replacing test samples and wiring. Three personnel are also required to be on-site to ensure personnel safety.
Before turning on the instrument, ensure that the DC high-voltage power supply is connected to a 220V AC power source, verify that the wiring is correct, and check that the high-voltage discharge probe is securely grounded.
After the test is complete, zero the instrument. Then, disconnect the power supply during the discharge process. The discharge process is divided into two steps: first, discharge the test sample with the discharge probe. Do not immediately bring the discharge probe into contact with the test sample.
The discharge probe should be gradually brought closer to the test sample, and discharge should begin at a certain distance from the ball gap, with a crackling sound. When the sound disappears, use a discharge rod to ground the discharge.
When the DC high voltage is 200kV or above, even if test personnel wear insulated safety shoes and remain at a safe distance, due to the static field of positive ions, adjacent personnel will have different DC potentials. Workers should avoid shaking hands or touching each other, as this may result in a mild electric shock. This is more pronounced in arid climates and winter.
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