The DC high voltage generator is a relatively common DC withstand voltage device in the power preventive test equipment. Early, the DC high voltage generator can be used for the DC withstand voltage test of the power cable to check the insulation performance of the cable. At this stage, the DC high voltage generator is mainly It is used to measure the leakage current of zinc oxide arresters or act as a DC power supply.

The DC high voltage generator adopts large voltage feedback, which greatly improves the voltage stability, realizes high-quality, portable, and can withstand the rated voltage discharge without damage. With the characteristics of large output power and small size, it is widely used in electric power tests for leakage current tests such as lightning arresters. Let's talk about the test methods and precautions for measuring oxidizing arresters with DC high-voltage generators.

Before using the DC high-voltage generator, connect the connecting wire and the ground wire, and ensure that the grounding is reliable. If the zinc oxide arrester is removed for measurement, the zinc oxide arrester should be placed on the insulator, and a sufficient safety distance should be maintained.

First of all, the DC withstand voltage test should be carried out in dry weather as much as possible, and then wipe the test product clean and keep a sufficient safe distance from the surroundings. Before the test, the test product should be discharged to the ground.

Start the DC high voltage generator, turn the pressure limiting knob of the control panel to the right to large, and then increase at a constant rate at a rate of 2%%u8BD5 test voltage per second. Pay attention to the reading of the microammeter during the boost process, according to the zinc oxide The test specification for lightning arresters, when the leakage current value is read at 1mA, the leakage current at 0.75 times the voltage is the leakage current. Therefore, it should rise as slowly as possible during the boost process. When boosting, you can use the fine adjustment knob to cooperate. Try not to exceed the limit too much. The leakage current varies according to the voltage level. The smaller the leakage current, the better, usually 0 to 5mA. After the test is completed, remember to fully discharge, otherwise the residual voltage may constitute your safety. harm.