电气运行原理
Principle of electric operation
电气系统微机保护装置的数字核心一般由CPU、存储器、定时器/计数器、Watchdog等组成。数字核心的主流为嵌入式微控制器（MCU），即通常所说的单片机;输入输出通道包括模拟量输入通道（模拟量输入变换回路（将CT、PT所测量的量转换成更低的适合内部A/D转换的电压量，±2.5V、±5V或±10V）、低通滤波器及采样、A/D转换）和数字量输入输出通道（人机接口和各种告警信号、跳闸信号及电度脉冲等）。
The digital core of electrical protection system is composed of CPU, memory, timer / counter, Watchdog and so on. The mainstream of the digital core is the embedded micro controller (MCU), which is usually described as the single chip microcomputer; the input and output channels include analog input channels (analog input conversion circuits (the amount of CT, PT measured to a lower voltage suitable for internal A/D conversion, + 2.5V, + 5V or + 10V), low pass filter and sampling, A/D Conversion and digital input and output channels (human-machine interface and various alarm signals, tripping signals and electrical pulse).
保护装置
Protector
电气系统微机保护装置是用微型计算机构成的继电保护，是电力系统继电保护的发展方向（现已基本实现，尚需发展），它具有高可靠性，高选择性，高灵敏度。微机保护装置硬件包括微处理器（单片机）为核心，配以输入、输出通道，人机接口和通讯接口等。该系统广泛应用于电力、石化、矿山冶炼、铁路以及民用建筑等。微机的硬件是通用的，而保护的性能和功能是由软件决定
The microcomputer protection device of electrical system is a relay protection made up of a microcomputer. It is the development direction of the relay protection of the power system (now it is basically realized and needs to be developed). It has high reliability, high selectivity and high sensitivity. Microprocessor protection hardware includes microprocessor (MCU) as the core, with input and output channels, man-machine interface and communication interface. The system is widely used in power, petrochemical, mining, metallurgy, railway and civil buildings. The hardware of a microcomputer is universal, and the performance and function of protection are determined by software.