Introduction to safety testing equipment:

The safety tester is used for voltage withstand measurement and testing of high-voltage components and devices (using AC and DC voltage testers), such as silicon stacks. It is mainly used to detect whether the product leaks electricity, whether it is well grounded, and whether it will harm personal safety. The main testing items include voltage, leakage current, insulation resistance, and grounding resistance.

Precautions for safety testing equipment:

Note that the DC high voltage output is negative voltage, while the ground is positive. When testing capacitors, there is a charging process when voltage is applied across the capacitor. At this time, there is a charging current in the testing circuit. When the current is greater than the set leakage current value, the voltage tester will alarm, interrupting the test and preventing it from proceeding. Therefore, when testing with a safety tester, the voltage should be slowly increased and the charging current should be less than the set leakage current value until the specified test voltage is reached for testing. And fixed voltage cannot be used for resetting—Test the startup method.In the AC circuit, it is equivalent to the resistance in the DC circuit. Therefore, the safety tester generates a current in the AC circuit. When the current exceeds the set leakage current value, the voltage tester will alarm, causing the test to be interrupted and unable to proceed. Therefore, before testing, the capacitance impedance of the capacitor should be calculated first（Xc）Then calculate the loop current value under the test voltage, and adjust the preset leakage current value of the withstand voltage tester to make it slightly greater than the loop current value, and then conduct the test.J）Testing components (equipment) with high distributed capacitance such as cables should be equivalent to capacitor testing.

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