全称：三相组合式过电压保护器，是6kv以上的电力系统中用来限制存在于某两物体之间的冲击过电压的一种设备。简称：过压保护器。有的地区还叫做”三相组合式避雷器“。

Full name: three-phase combined-type overvoltage protector, which is a kind of device used in the power system above 6kv to limit the shock voltage between the two objects. The overvoltage protector. Some areas are also called "three-phase combination arrester". 

过电压保护器为一种比较先进的保护电器，主要用于保护发电机、变压器、开关、母线、电动机等电气设备的绝缘免受过电压的损害。相当于浪涌保护器的高压形态。属于一种避雷器部分替代品，它的作用相当于避雷器，但与传统的避雷器不同。

Over-voltage protector for a more advanced protection appliances, is mainly used to protect generator, transformer, switch, bus, motor and other electric equipment insulation from the damage of overvoltage. This is the high pressure form of the surge protector. It is part of a lightning arrester, which ACTS as a lightning rod, but is different from the traditional lightning conductor. 

1：普通避雷器只能是相地保护（单相保护，每组用三个），即可以相地保护也可以相间保护（三相）。

1: the common lightning arrester can only be protected by phase protection (single phase protection, each set of three), which can be protected by the same phase and can be protected by phase and phase (phase 3). 

2：过电压保护器一般安装在柜体内，而传统的避雷器既可以安装在柜体内也可以安装在箱体外（箱体外部的基本上都是避雷器）。

2: over-voltage protector generally installed inside the cabinet put oneself in another's position, and the traditional lightning arrester can be installed in the cabinet put oneself in another's position inside can also be installed outside the enclosure (cabinet external basically arrester).