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LED lighting withstand voltage and countermeasures

Time:2022-03-07 Views:0

LED lighting leakage current setting:


    The leakage current here refers specifically to the leakage current generated in the withstand voltage test, which is the alarm threshold we set in the test. The human body's response to the current is as follows: sensing current: 1.1mA for males, 0.7mA for females; escape current: 9mA for males, 6mA for females (probability 99.5%); lethal current (ventricular fibrillation current): 50mA (current duration exceeds the heartbeat cycle) , 500mA (current duration within 0.1 seconds). When the current flowing through the human body exceeds 10mA, there is a danger of electric shock. Therefore, in general, the leakage current standard of type test is defined as 5mA. In GB 7000.1, the type test section does not clearly specify the leakage current in the withstand voltage test, but in the factory type test in the appendix, the size of this value is clearly specified.


    LED lighting withstand voltage test and breakdown test:


    The standard will specify the specific voltage value during the test. After the withstand voltage test, it can only show that the insulation structure of the product can withstand the test voltage, but it cannot explain how high the voltage of the insulation structure of the product can withstand. If the application research of insulating materials and the design of electrical equipment are carried out, the breakdown test should be carried out when the dielectric strength needs to be determined. The breakdown test is to test the voltage at which the dielectric is broken down. When the electric field strength exceeds a certain limit, the relationship between the current through the medium and the voltage applied to the medium does not conform to Ohm's law, but increases suddenly. As shown in Figure 1, the insulating material is destroyed and loses its insulating properties. For electrical products, if its insulation breaks down, it loses its function of running and using.