Safety precautions for DC high voltage generator:
Personnel using the DC high voltage tester must be professionals with a "High Voltage Test Operation Certificate".
1. Users must comply with Article 168 of the "Electric Power Safety Regulations" when using this instrument, and install two obvious disconnection points before the working power enters the tester. When replacing test samples or wiring, first disconnect the two power disconnection points clearly.
2. Before testing, please check whether the grounding wires of the tester control box, voltage doubling cylinder, and test sample are properly connected. The test circuit grounding wire should be grounded at one point as shown in this manual.
3. Discharge of large capacitance test samples should be done using a 100Ω/V discharge resistor rod. When discharging, do not immediately touch the test sample with the discharge rod; gradually approach the test sample until the air gap begins to ionize and discharge with a hissing sound. When no sound is heard, discharge with the discharge rod, and finally directly connect the ground wire for discharge.
4. When DC high voltage is 200KV or above, even if test personnel wear insulating shoes and are outside the safe distance area, due to the influence of the high-voltage DC ion space electric field distribution, several nearby standing bodies may carry different DC potentials. Test personnel should not shake hands with each other or touch grounded objects with their hands, otherwise there may be a slight electric shock. This phenomenon is more obvious in dry areas and winter, but generally does not cause harm to people due to the small energy.
5. After testing, the grounding wire must be hung on the high-voltage output terminal before removing the high-voltage lead.
6. Reliable grounding must be ensured during use, and the high-voltage output cable is prohibited from being held in hand to prevent accidents.
Fault handling of DC high voltage generator:
No. | Phenomenon | Cause | Handling |
1 | After the power switch is turned on, the green light does not light up and the fan does not rotate. | 1. Power cord open circuit. 2. Power fuse blown. | Replace the power cord. Replace the fuse. |
2 | Press the red button, the light does not light up. | The voltage regulator potentiometer is not returned to zero. | Return the potentiometer to zero. |
3 | Press the red button, the light is on, but when boosting, the red light goes out and the green light comes on. | The high-voltage output terminal is grounded or the test sample is short-circuited. | Check the output cable. Check the test sample. |
4 | During boosting, the red light goes out and the green light comes on. | The test sample discharges or breaks down, overvoltage or overcurrent protection activates. |
