Product Description:

The PSI63C0.638-W2 is a water-cooled medium-frequency inverter produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. It converts three-phase mains power into regulated medium-frequency current for induction heating, hardening, and forging stations used in automated manufacturing cells, allowing precise control of coil temperature and energy input in closed-loop production sequences. Water circulation through an integral heat exchanger removes semiconductor losses so the device remains stable even in high-duty cycles. The inverter also integrates local control electronics, reducing external cabinet wiring.

It connects to a three-phase supply at 480 – 690 VAC with a nominal mains current of 110 A, and installation requires a minimum conductor cross-section of 35 mm². Heat generated inside the basic cabinet averages 100 W, while the liquid circuit can remove up to 420 W when coolant flows at 4 l/min, causing only 0.1 bar of pressure drop across the exchanger. Control tasks run on a TriCore CPU, and eight discrete inputs plus eight discrete outputs are routed through a DeviceNet interface for PLC communication. A diagnostics channel on the same bus reports temperature, current, and flow status back to the host controller.

During peak demand, the inverter’s enclosure dissipation rises to 140 W, and the power stage can deliver 800 A of primary current, which translates to 36 kA on the PSG 3100 secondary circuit. Terminal clamps accept conductors up to 50 mm², while the minimum bus-bar connection remains 35 mm² to match thermal ratings. All field devices are powered from 24 VDC, and timing of energy bursts is handled by a DeviceNet timer module. The complete assembly weighs 25 kg, so it can be mounted in standard power cabinets without special lifting equipment.