The invention discloses a detecting and testing device and method for an
inverter or a charger. The detecting and testing device comprises a power supply host, a detection
system and a module to be detected, and is characterized in that the module to be detected comprises a three-phase
inverter detection module I for simulating a dining car, or a three-phase
inverter detection module II for simulating a local
train, or a detection module III for testing a uniform single-phase inverter, a uniform charger, a non-uniform single-phase inverter and a non-uniform charger; the power supply host and the detection
system 2 are electrically connected, the power supply host comprises a DC power supply generation unit arranged at the upper layer, a simulated neutral-section passing unit arranged at the middle layer and a monitoring unit arranged at the lower layer; and the detection
system comprises a
chassis assembly with a box-type structure, a control panel arranged at the front end face of the
chassis assembly and a detection unit installed inside the
chassis assembly. The detecting and testing device has the characteristics of simple structure, convenient operation, stable quality, accurate judgment, wide
test object, high adaptability and the like.