Operation principle

The digital core of microcomputer protection device in electric system is composed of CPU, memory, timer / counter, Watchdog and so on. Mainstream digital core for embedded micro controller (MCU), commonly referred to as SCM; input and output channels including analog input channels (analog input conversion circuit (CT, PT measured quantity into less suitable amount of voltage, internal conversion of A/D + 2.5V, 5V + +, or 10V) low pass filter and sampling, A/D conversion) and digital input and output channel (man-machine interface and alarm signal, tripping signal and electric pulse etc.).

Protector

Microcomputer protection device of electric system is composed of microcomputer relay protection, is the direction of development of power system relay protection (now the basic realization, it is necessary to develop), it has high reliability, high selectivity, high sensitivity. The hardware of microprocessor protection device includes microprocessor (microcontroller) as the core, with input and output channels, man-machine interface and communication interface. The system is widely used in power, petrochemical, mining, smelting, railway and civil construction. The hardware of the microcomputer is universal, while the performance and function of the protection are determined by software.