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DC high voltage generator operation

time:2021/5/7   source:华天电力  reading:265 time

DC high voltage generator operating instructions troubleshooting techniques:

(1) The indicator lights, switches, knobs, etc. on the control box have been clearly marked, please refer to the names of the components on the panel of the control box when reading this operating instruction;

(2) The seven-core socket on the side of the high-voltage tower chassis is the socket for connecting the control box cable, and the copper terminal on the side of the chassis is the ground terminal for connecting the ground wire;

(3) The attached high-voltage shielding ammeter is a digital micro-ammeter. The jack on the top of the meter is the jack for connecting the tested product line. It also serves as a power switch. When not in use, please unplug the plug to automatically turn off the power. When replacing the battery, please use a screw knife to open the upper cover, after the replacement, please fasten the cover and tighten it with screws. Open the back cover when changing the battery of the oblate watch;

DC Hipot Tester.png

1. Connect the grounding terminal on the control box panel and the grounding terminal of the high-voltage tower with a grounding wire and connect it firmly to the ground wire of the site or laboratory. To ensure the safety of you and the equipment, please check the ground wire repeatedly to ensure that all parts are well grounded.

Use the provided seven-core cable to connect the control box and the high-voltage tower. The two ends of the cable are the same fast aviation plugs. Pay attention to insert the side gap of the plug to the thick convex part of the socket and tighten it clockwise. (Either end of the cable can be connected to the control box or high-voltage tower) Connect the power cord, and the power supply is a single power frequency AC 220V.

2. Turn on the power switch, the power switch light (green) and the panel meter are on at this time. Turn on the high-voltage switch, the high-voltage indicator (green) lights up. If the high-voltage buzzer is in the on position, it will beep to remind the operator that the high-voltage is being applied. At this time, turn the high-voltage output adjustment knob clockwise to increase the pressure. The voltmeter displays the KV value of the voltage on the load test sample, and the ammeter displays the sum of the current flowing on the test sample and all leakage currents, but does not include the current of the built-in high voltage divider. The current is microampere value.

If the power switch is turned on and the high-voltage switch is turned on, the high-voltage indicator light (green) does not light up, and the "return to zero" light (red) is on in the fault display, it means that the high-voltage output adjustment knob is not at the zero position. The "return to zero" light is off, and then adjust clockwise to increase the voltage.

3. If the DC high voltage generator does not require voltage regulation protection within the rated output voltage range, turn the overvoltage protection setting button clockwise to the maximum value. At this time, when the output voltage exceeds the rated output voltage, it will automatically protect and cut off the high voltage. If it is required to perform voltage regulation protection within the rated output voltage range, please boost the no-load boost to the predetermined protection voltage according to the above steps, and then slowly turn the overvoltage protection setting knob counterclockwise to the required voltage. Perform over-voltage protection action, the "over-voltage" indicator light is on, keep the over-voltage protection setting knob at this position, return the boost knob to the zero position, and turn off the power. After connecting the test product, the high voltage will be cut off when the boost voltage exceeds the predetermined voltage.

4. When an over-voltage, over-current and other fault occurs, the high voltage is automatically cut off, the high voltage indicator light (green) is off, the buzzer stops beeping, and the corresponding fault indicator light is on, indicating that the product has been short-circuited. If you want to restart, you should The high voltage output adjustment knob returns to the zero position, the fine adjustment knob is also at the zero position, and then turn off the power switch, and then turn on the power switch to cut off the protection and re-boost.

(1). When shutting down during normal operation, first turn the high-voltage adjustment knob back to the zero position counterclockwise, then return the fine adjustment knob to the zero position, and finally turn off the power switch.

(2). The power switch is also used to protect the reset switch. When the fault indicator light (except the zero return indicator light) is on, the power switch should be turned off and on again to release the protection and re-boost.

5. When the DC high voltage generator load is a large capacitive load, in order to avoid triggering overcurrent protection due to excessive charging current, please slow down the boost speed appropriately. After the test, turn the output voltage adjustment knob counterclockwise to the zero position and turn off the high-voltage switch. At this time, the voltmeter still displays the voltage value on the sample. Please wait for the sample to be discharged through the high-voltage tower to below 20KV before using the ground rod to discharge To ensure safety.

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