Product Details:

The SEW 1122-403-1-00 frequency inverter belongs to the MOVITRAC series, a robust drive spare part from SEW-EURODRIVE for variable speed control of three-phase asynchronous motors. This vfd unit supports V/f control and sensorless vector control modes, adjusting output voltage and frequency synchronously to regulate motor speed and torque. It is designed for single-phase 200–240V AC input, receiving speed reference signals from terminal blocks, local operation panels or optional fieldbus adapters, processing internal control logic and supplying variable-frequency PWM power to matched AC motors. Built-in soft start and soft stop functions effectively reduce starting inrush current and mechanical shock to conveyor, packaging and other automation equipment. If the internal power module or control circuit is damaged, the motor will run abnormally, trigger overload, overvoltage and overheat alarms, and lead to unexpected production halt.

This vfd unit adopts compact IP20 cabinet-mounted modular structure. It reserves connection interfaces for external braking resistors and EMC filters, and integrates multi-channel digital and analog I/O terminals for signal interlock and status output. It can be equipped with SEW operation panel and communication option modules for parameter setup and remote data exchange. Multiple complete protection functions are embedded, including overcurrent, overvoltage, undervoltage, short circuit, overheat and motor overload protection. The rated working ambient temperature range is 0℃ to 55℃, and storage temperature ranges from -20℃ to 70℃. The front panel is fitted with LED indicators and digital display to show running frequency, output current and fault codes for maintenance technicians to quickly locate faults.

This SEW 1122-403-1-00 frequency inverter is widely used as maintenance replacement spare parts for small conveyors, packaging auxiliary machines, fans, pumps and other general automation equipment requiring adjustable speed. The original manufacturer has discontinued this model, and most units available on the global industrial spare parts market are fully tested refurbished units. Before installation, technicians need to inspect IGBT power modules, electrolytic filter capacitors, drive chips, cooling components, PCB traces and power terminals for aging, bulging and poor contact. After installation, users need to input motor nameplate parameters, select control mode, adjust acceleration and deceleration ramp time, and complete no-load and load running tests. Proper parameter configuration and regular inspection of this frequency inverter can guarantee stable motor operation and reduce unplanned production downtime.