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The DC high voltage generator fails

time:2020/9/17   source:华天电力  reading:241 time

Inspection and Treatment of Failure of DC High Voltage Generator


1. When the power switch is turned on, the digital display on the control box does not light up. Please check the power connection and all fuses. If the fuse is damaged, please replace it with a new one according to the amperage marked next to the fuse holder.


2. If turn on the power switch. The digital display is bright and the high voltage is displayed. The green light is off and high voltage cannot be applied.


(1) The fault display "return to zero" light is on and there is no return to zero. Please turn the high-voltage output adjustment knob and fine adjustment knob counterclockwise to the zero position until the "return to zero" light goes out. You can add high pressure.


(2) There are two phenomena when the fault display "other" light is on: grounding protection; disconnection protection.


a. The ground wire may not be connected properly. Or the ground wire is not reliably grounded. Please connect a reliable ground wire. Turn off the power. Restart.


b. It may be that the cable connecting the control box and the high-voltage tower is not connected properly. Please turn off the power and restart after connecting the cable. Or this fault will occur when the welding heads at both ends of the cable are disconnected. Please weld the welding heads at both ends of the cable. Turn off the power and restart.


c. It is possible that a wire end in the control box is disconnected and disconnected. Please re-solder, turn off the power, and restart.


DC Hipot Tester.png


3. everything is normal. But in the process of not rising to the rated output voltage.


(1) The fault display "overcurrent" light is on


a. The sample is short-circuited, or the leakage current is too large.


b. When the load is large, the boost is too fast. Turn off the power and restart. Slow down the boost speed.


(2) The fault display "overvoltage" light is on and the overvoltage protection setting knob is not set to the maximum position. Please turn clockwise to the maximum point. Turn off the power and restart.


4. When a short circuit occurs under high voltage, the short circuit current is large. It is possible to light up all the fault indicators, which is normal. Please restart after troubleshooting the test product.


5. After troubleshooting of the test product. The fault indicator is still on, and high voltage cannot be applied. Power switch and fault protection reset switch. Please turn off the power and restart to boost the voltage.


6. If the voltmeter numbers fluctuate too much. Please check whether the 7-pin shielding joints of the aviation plug at both ends of the connecting cable are disconnected. If disconnected, please solder it.


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