Automatic delecting instrument for the power source of electric locomotives

The utility model discloses an automatic detecting instrument for the power source of electric locomotives, comprising a microcomputer and an interface circuit. The interface circuit comprises a high-voltage power source, a breaker control switching circuit, a zero passage pulse generation circuit and a detecting channel. The microcomputer, which adopts an MCS-96 single chip single-board computer, comprises an MCS-96 single-chip computer, a program memory, a data memory, a keyboard display unit and a printer. The utility model can detect the leakage current of each rectifying element of the half-controlled bridge of the power supply panel, the angle, the dissymmetry and the amplitude value of a trigger pulse, the power supply link, the governing link and the phase shifting link of a control card. The utility model with high detecting precision can automatically detect various detecting indexes.