Product Description:

The industrial medium-frequency inverter PSI62C0.179-W1 is manufactured by Bosch Rexroth Indramat as a member of the PSI Frequency Inverters series. The unit converts three-phase mains power into controlled medium-frequency output for induction heating, brazing, or similar automated processes that demand fast energy transfer to the workpiece. A 24 V timer circuit keeps auxiliary functions energized during the programmed cool-down phase, which helps maintain controlled thermal rundown after the heating cycle ends.

It accepts a three-phase input of 400 – 480 VAC and internally raises the switching rate to 1000 Hz, so coils or transformers connected to the secondary circuit can deliver localized heating without large reactive components. Under continuous duty, the inverter supplies a nominal line current of 220 A, so upstream protection and supply hardware must be sized for that steady load. Short-term process acceleration is supported by a primary peak current of 1200 A, while the integrated transformer can pass up to 54 kA on the secondary side for a brief interval. Cabling to the power terminals must use 95 mm² conductors to limit resistive losses. The stop contact rated at 24 VDC / 3 A permits external safety relays to interrupt the inverter.

Thermal management is handled by a water-cooled plate; basic cabinet dissipation is 69 W during idle operation and rises to 210 W when the power stage operates at maximum magnetization. If the full output cycle is sustained, the cooling circuit must be able to extract up to 700 W. Bosch Rexroth specifies a minimum flow of 4 l/min with a resulting pressure drop of 0.6 bar, supplied through the M16 × 1.5 threaded connectors. The electronics carry a protection rating of IP20, while the designated installation zone must reach IP54 so airborne dust or spray cannot enter the enclosure. For monitoring, cabinet loss and cooling loss values are routed to the process controller, allowing preventive shutdown before over-temperature events occur.