3 line plug for the input: AC GND AC connections

2 line plug for output 220V

Introduction: with the development of electronic technology, the problem of electromagnetic interference in high frequency electrical power, switching power supply has become an extremely difficult problem in circuit interference, they interfere with each other, but also self interference, to make the power by the high-frequency EMI pollution, light and unstable operation of equipment, while frequent restart problem strange. In this environment, EMI filters have been designed to greatly improve this situation.

Subject: for high frequency electromagnetic interference (EMI), there are usually three techniques for power filtering to suppress interference noise. In practice, two or even a variety of technologies are often used in combination. They are:

1 、 add capacitor between the fire and zero line, that is X capacitor.

2. Add capacitance between each power line and ground wire, that is, the Y capacitor.

3, common mode suppression (suppression coil on two power lines).

Our design of this EMI filter is the combination of the above three technologies, it can let the low frequency of useful signal pass smoothly, and the high frequency interference has inhibitory effect. Although the current is only 2A (400W) /4A (800W), is only applicable to the working current is small, but very high requirements for the power supply equipment, such as the input AC power before the small power level, the desktop CD DAC decoder, cameras and other equipment cleaning. It can suppress the noise of network and higher harmonics, noise and high frequency harmonic produced by switching power supply, motor and so on. Improve the purity of sound quality, reduce noise caused by AC power supply interference.

Installation position: power line interference is the main way to incoming and outgoing equipment equipment, through the power line, power interference can be passed to the equipment, interfere with the normal work of equipment, the same interference generated by the equipment may also be through the power line to the power grid, normal work interference with other equipment. Therefore, the ideal installation position is the power socket of the equipment, such as audio equipment, transformer, switch power supply, the power supply of the back of the display and so on.