Handheld portable current loop impedance and current type relay tester

The utility model discloses a handheld portable current loop impedance and current type relay tester, and relates to the field of power system test tools. Conventional relay protection single-phase testers are large in size, tedious in test operation, inconvenient to carry and transport in outdoor tests and poor in waterproof effect. The mobile power supply comprises a shell, a standard current source module, a CPU module, a battery module and a display screen, wherein the standard current source module, the CPU module and the battery module are arranged in the shell; a contact state indicating lamp, a current output coarse adjustment knob, a current output fine adjustment knob, a tester power switch, an AC/DC output change-over switch and a current loop state indicating lamp are further arranged on the front face of the shell, and waterproof treatment is carried out. The size is effectively reduced, outdoor test carrying is facilitated, test operation is convenient, and the waterproofeffect is good. 本实用新型公开了