1. Check whether there are any unsafe factors in the test environment. If not, power on the withstand voltage test equipment and preheat it for 5 minutes. 2. Check whether the test equipment is set to the required voltage gear, and whether the set leakage current value meets the requirements. 3. Short-circuit the high-voltage output terminal of the test equipment, and check whether the overcurrent relay operates or whether a breakdown signal is issued.
4. Set all switches of the electrical appliance under test to the closed state. 5. Connect the test clips of the test equipment to the specified parts for testing (for the main circuit...).
1. Check whether there are any unsafe factors in the test environment. If not, power on the withstand voltage test equipment and preheat it for 5 minutes. 2. Check whether the test equipment is set to the required voltage gear, and whether the set leakage current value meets the requirements. 3. Short-circuit the high-voltage output terminal of the test equipment, and check whether the overcurrent relay operates or whether a breakdown signal is issued.
4. Set all switches of the electrical appliance under test to the closed state. 5. For control and auxiliary circuits not connected to the main circuit, connect them to the metal support; when testing control and auxiliary circuits, connect the main circuit to the metal support.) 6. Operate the test equipment to increase the voltage. Avoid jumping, then quickly increase to the specified voltage value (the entire voltage increase process takes about 10 seconds). Time it, and maintain for 1 minute, during which no continuous flashover or breakdown should occur. 7. After 1 minute, if no continuous flashover or breakdown occurs, slowly reduce the voltage to zero, cut off the power, and the test is complete.
Using the sudden power-off method is inappropriate, because instantaneous voltage loss can cause oscillatory overvoltage and may break down the test sample. .
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