Product Description:

The PSI63C0.777-W1 belongs to the PSI Frequency Inverters series manufactured by Bosch Rexroth Indramat. Classified as a medium-frequency inverter, it converts fixed three-phase mains energy into controlled output suitable for induction heating, welding, or other process equipment that benefits from adjustable medium-frequency power. The integrated control electronics, cooling circuit, and 24 V auxiliary supply make the unit a compact drive component for industrial automation cabinets.

The power section is built around a water-cooled heat sink, allowing stable semiconductor temperatures even when the inverter is fully loaded. It accepts a three-phase mains range of 400–480 VAC, which covers common industrial distribution voltages without requiring a step-up transformer. A line frequency of 50 or 60 Hz lets the inverter operate in plants that follow either IEC or North American grid standards. Control electronics and external sensors are supplied by an internal auxiliary rail rated at 24 VDC. The rail can provide up to 2 A for contactors, relays, or fieldbus nodes. Supervisory timing and diagnostic data are transmitted through the model’s Ethernet-based timer interface, enabling a direct connection to compatible PLC networks without additional gateways.

The housing has a protection rating of IP20, so it prevents finger contact with hazardous internal parts but must be installed in an enclosed panel. During operation, the cooling circuit removes up to 420 W of thermal losses, a value used to select the heat exchanger capacity and coolant flow rate. Reliable operation is maintained at ambient temperatures from +10 to +55 °C, matching the 3K3 climatic class for control rooms with filtered air. During transportation or storage, the unit tolerates temperatures from -25 to +70 °C without performance degradation. The inverter has an approximate mass of 25 kg, which must be considered when selecting cabinet supports, mounting hardware, and safe handling equipment.