Product Description:

The PSI63C0.325-L2 is a medium-frequency inverter produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. Designed for induction heating, welding, and other fast-switching drive tasks, the unit converts a three-phase high-voltage mains supply into a controlled medium-frequency output for precise power delivery in automated production cells. By integrating control electronics, protection, and air-cooled heat management in one cabinet, the inverter provides a compact interface between the plant’s supply network and the machine’s induction coil or transformer.

The inverter accepts an input range of 480 – 690 VAC and drives loads with a maximum output current of 800 A. Internal power devices are switched at a clock frequency of 1 kHz, enabling stable regulation of the medium-frequency waveform. A separate control supply of 24 V DC powers the logic circuits, fieldbus nodes, and the INTERBUS timer that coordinates cycle timing with a higher-level PLC. The cabinet carries a degree of protection rated at IP20, so it must be mounted inside an enclosure that excludes conductive dust and liquid spray. Metal-oxide varistor overvoltage protection clamps incoming transients, and integrated temperature monitoring supervises semiconductor junctions during high-current bursts.

Thermal dissipation is controlled by an air-cooled heat sink that limits basic cabinet loss to 100 W under standby conditions and permits up to 360 W of cooling loss during rated service; an additional 200 W power-cabinet loss is factored into airflow calculations. Continuous operation is allowed at ambient temperatures up to 55 °C, provided a vertical clearance of 100 mm is left above the exhaust grill. Line current in steady state equals 110 A, and terminations accommodate 35 mm² motor conductors while mains terminals accept 50 mm² wiring. The MOV clamps, airflow path, and integrated sensors help keep internal components within safe thermal and electrical limits.