The power supply circuit breaker tripping a A4022 frequency in the process of using circuit breaker tripping. Jump up and down. Measuring frequency

Time: 3/28/2017 7:42:11 PM

A A4022 fncy power in power the process of using circuit breaker tripping. Jump up and down. Measuring transducer power supply terminal RST, three-phase all pass. Finished, the rectifier burned. Open to see if there are any deep marks, no arcing, no visible damage.
Measure between RST and + terminals, all pass.
Measure between RST and - terminals, unidirectional conduction.
The inverter does not have any brake unit, no bus