Portable relay protection tester

The utility model discloses a portable relay protection tester, which relates to the field of relay protection testing and comprises a shell, an output current adjusting knob, an output time adjustingknob, a test button, a current output socket, a lithium ion rechargeable battery, a power switch SPWM signal generating unit, a driving amplification unit and a full-bridge inversion output unit. Anda filtering unit, an output current control unit and a fault time controller. The tester provided by the utility model is simpler in structure and 2kg in total weight, but can meet the basic inspection requirement on the over-current three-section type protection function of the rural field distribution automation switch relay protection device. 本实用新型公开了一种便携式继电保护测试仪，涉及继电保护测试领域，本实用新型包括外壳、输出电流调节旋钮、输出时间调节旋钮、测试按钮、电流输出插口、锂离子充电电池、电源开关SPWM信号发生单元、驱动放大单元、全桥逆变输出单元，滤波单元，输出电流控制单元，故障时间控制器。本实用新型测试仪结构较简洁，总重量才2千克，但能满足对农村野外配电自动化开关继电保护装置过流三段式保护功能的基本检验要求。