过电压保护器与避雷器的区别

The difference between the over-voltage protector and lightning arrester

二者都有抑制过电压保护电气设备的作用。

Both have to inhibit the action of the overvoltage protection of electrical equipment.

　　一般意义上的过电压保护器是对工频过电压进行保护的，所谓工频过电压，往往产生在操作过程中，如开关开断时电弧未过零就被开断时会有过电压，回路开断时由于回路波阻抗不同而产生电压反射波叠加的操作过电压等等，这些过电压都是工频过电压，也就是其电压波形的频率还是维持50HZ没变。

In general factory frequency overvoltage protection, over-voltage protector is the so-called power frequency overvoltage, often produced in the process of operation, such as switch open circuit when the arc is not zero was open circuit when the overvoltage, when circuit open circuit due to lupo impedance resulting voltage reflection wave superposition of different operating overvoltage, and so on, these overvoltage is power frequency overvoltage, which still maintain its voltage waveform frequency 50 hz.

　　避雷器是保护雷电过电压的，避免器件遭受雷击瞬时高压的损坏，这种过电压波形前端很陡，频率很高，但后续电流很小，避雷器可以将雷电波的峰值泄放从而保证其后面的电器安全。通常避雷器正常情况下是处于断路，在经过雷击高压时导通将其释放到大地上。

Lightning arrester is lightning overvoltage protection, avoid instantaneous high pressure device lightning strike damage, the overvoltage wave front is steep, the frequency is very high, but the following current is very small, lightning arrester can be thunder electric wave peak discharge to ensure that the following electrical safety. Arrester is normally in the open circuit, usually after a lightning strike when high pressure conduction to release it to the earth.