* Overvoltage protection: Commutating overvoltage protection, overvoltage protection on AC side, overvoltage protection on DC side.
* Overcurrent short-circuit protection: Diode breakdown rapid fuse protection, bridge arm countercurrent detector protection.
* Overheat protection: A temperature monitoring point is set where the rectifier is the hottest.
* Failure alarm: Alarm in the case of failure at one diode on the bridge arm or temperature exceeding the set value.
* Failure tripping: Countercurrent trips in the case of the failure to both diodes of the bridge arm, failure alarming and tripping signals have the screening cabinet panel display, terminal junction output and the embedded RS485 serial communication port output.
* GGD standard metal screening cabinet with plastic coated surface, other metal connectors galvanized, bus bar tinplated and mounting insulating board coated with fire retardant paint.