GE PEX4-200是通用电气（GE）的一种微机保护与测控装置的型号标识。这种装置通常用于电力系统中的变电站，实现对不同电压等级的设备的保护、测量、控制、调节、信号、故障录波、电度采集等功能。

这种装置采用了国际先进的数字信号处理器（DSP）和表面贴装技术，以及灵活的现场总线（CAN）技术，能够满足变电站不同电压等级的要求，实现变电站的协调化、数字式及智能化。

It is the model identification of a microcomputer protection and measurement and control device from General Electric (GE). This type of device is usually used in substations in power systems to achieve functions such as protection, measurement, control, regulation, signal, fault recording, and electrical degree acquisition for equipment of different voltage levels.

This device adopts internationally advanced digital signal processors (DSP) and surface mount technology, as well as flexible field bus (CAN) technology, which can meet the requirements of different voltage levels in substations and achieve coordinated, digital, and intelligent substation.