The difference between withstand voltage leakage current and leakage current leakage current

1、 Define and test conditions
Voltage leakage current: Voltage leakage current refers to the leakage current that flows through the internal insulation of a product when a high voltage of several thousand volts is applied during testing when the product is not charged. This type of test is usually used to test the insulation performance of products under high voltage.
Leakage current: Leakage current is the current formed between metal parts with mutual insulation or between live parts and grounded parts in electrical systems, through their surrounding media or insulation surfaces, when no fault voltage is applied. The leakage current test is conducted under normal operating conditions, usually with the application of AC voltage.
2、 Test purpose and application scenarios
Voltage leakage current: mainly used to test the insulation performance of products under high voltage, ensuring that the products will not be damaged due to high voltage during normal use. The testing condition for withstand voltage leakage current is no working power supply state, so the current value tested is relatively large, generally ranging from a few milliamps to tens of milliamps, and even up to 100 milliamps and 200 milliamps.
Leakage current: mainly used to verify the safety of power supply in contact with human body. The testing conditions for leakage current are normal working conditions, so the tested current value is relatively small, usually between a few milliamps and a few milliamps. The standard requirements for leakage current vary by industry, for example, the medical industry has very strict requirements for leakage current, usually requiring less than 0.1 milliampere.

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3、 Measurement method
Voltage leakage current: When measuring voltage leakage current, it is necessary to apply a high voltage higher than the working voltage without a working power supply to detect the leakage current of the insulation system under high voltage
Leakage current: When measuring leakage current, it is necessary to apply AC voltage to power the equipment under normal working conditions, detect the ground current of the equipment, and detect the danger of electric shock caused by excessive current of the equipment to the human body.
4、 Different hazards
Leakage current:
(1) Electric shock hazard: Leakage current can cause the metal shell to become electrified, and the generated voltage can easily cause harm such as electric shock to the contact person;
(2) Asset loss: Leakage current can damage electrical equipment and even cause fires, resulting in property damage;
Leakage current:
(1) Electric shock hazard: Grounding fault current caused by leakage current may pose an electric shock hazard, resulting in personal injury;
(2) Energy waste: Leakage current can cause energy waste and increase electricity costs;
(3) Equipment damage: Excessive leakage current can have adverse effects on electrical equipment and shorten its service life;