【摘要】 介绍了一种多功能电子继电器，它采用单结晶体管构成，具有短路速断动作、过流反时限延时动作、缺相延时动作等功能，体积小，功耗低，动作灵敏，价格低，适用于各种电力设备尤其是电机负载．更多还原

【Abstract】 This paper presents a new electronic relay consisting of unijunction transistors. It has the action of short-circuit protection, overcurrent protection and phasefailure protection. This relay featuring with small volume, low cost/power consumption and flexible action is applicable to all sorts of power equipment especially the electric motor.更多还原