This paper introduces the design of a new protection device for small current neutral grounding power network, combined with curriculum teaching of principles of protective relaying in power system.

• 结合电气工程专业“电力系统继电保护原理”课程教学,介绍了一种电力系统小电流接地保护实验装置的设计,采用零序电流群体比幅原理实现,由集成电路运算放大器构成。