Portable small-current grounding line selection device tester

The utility model discloses a portable small current grounding line selection device tester, comprising a tester main body, a DSP module and a power supply, the tester main body is connected with the power supply, a three-path voltage power amplifier module, a merging module and an input module, the DSP module is connected with an AVR single-chip microcomputer, an AT control digital processor, a power amplifier overheating alarm mechanism, a first waveform recovery protection alarm mechanism, a six-path D/A conversion module, a second waveform recovery protection alarm mechanism, an output module and an input module, and the second waveform recovery protection alarm mechanism is connected with a three-path current power amplifier module. And the first waveform recovery protection alarm mechanism is connected with a three-path voltage power amplifier module. The portable tester for the small-current grounding line selection device can better meet the test work of the small-current grounding line selection devi