【摘要】 本文描述了一种基于PIC1 6F877单片机的电子式过载保护继电器的硬件系统结构和软件系统设计。该电子式过载保护继电器一方面可实现电动机的多种保护功能 ,另一方面可与通信管理机进行串行通信。更多还原

【Abstract】 The paper describes the hardware configuration and software design of an electronical overload protective relay with PIC16F877 singlechip. This overload protective relay can not only finish the systematical protection of many kinds of failures, but also realize serial communication between the protective relay and the superior computer by RS-485 interface chip.更多还原