Household appliances are still widely used in our lives, in addition to common TV sets, washing machines, refrigerators, etc., there are a lot of equipment to help the family environment to use. For example, lawn mowers, which are widely used by families in Europe and the United States, are considered a kind of household appliances. Many manufacturers specializing in the manufacture of lawn mowers have always used the European and American markets as the main sales of their products.
CE certification standard is the most stringent, and various testing items are also very numerous. Even some of the test content in the appendix is more important, we will talk about the detection of leakage today.
In the given example circuit diagram, it is a measurement circuit to perform leakage current. In the whole Wang point, there is a main switch, and in the branch of the overall circuit there is a diode, a meter, and a resistor. The total resistance of the measurement circuit is between 1500 ohms and 2000 ohms, and a capacitor in parallel gives the time constant of the circuit a range of 210 only 240 microseconds. When determining the most sensitive area of the circuit and checking it, test that the current passing through the area is not less than 0.1 mA.
When the current passes through a relatively high area, it should be connected to the measuring instrument through the resistance, and the measured value should be adjusted after the resistance in the series circuit. In general, at sine wave frequencies of 50 to 59 Hz, the currents at the three basic measuring points are 0.25 mA, 0.5 mA, and 0.75 mA. The submitted sample can be tested using overcurrent protection, but it must be ensured that the overcurrent protection does not affect the overall performance of the circuit.
The above is the ce certification body on the CE certification of household appliances CE certification testing standards in detail introduction, I hope to help you, if you need to reprint, please indicate the source, Thank you for your cooperation!