Product Description:

The PSI63C0.731-L2 is a medium-frequency inverter introduced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. This power-conversion unit transforms three-phase utility power into a regulated medium-frequency waveform that feeds induction coils, infrared emitters, or similar loads. By coordinating with higher-level controllers, it supplies tightly metered energy for brazing, forging, and material-treatment cells used throughout automated manufacturing environments. Stable frequency control helps the process deliver repeatable heat input during automated production runs.

The inverter accepts a utility connection of 480 – 690 VAC, and its power stage draws a steady 110 A during continuous operation. For startup surges, the bridge and bus are rated for 800 A on the primary side, while the PSG 3100 secondary path can tolerate fault currents up to 36 kA without magnetic saturation. An output carrier of 1 kHz produces the medium-frequency envelope used to heat workpieces uniformly. Conductors of at least 35 mm² are required by the wiring guidelines to maintain temperature limits, and the assembly is air-cooled through integrated fans. I/O is handled through Ethernet, and an EtherNet timer aligns firing sequences with external PLC clocks to maintain phase coherence during timed process steps.

A TriCore processor supervises modulation algorithms and local diagnostics, which helps the unit respond quickly to operating changes. An auxiliary supply provides 24 VDC at 2 A for sensors and contactor coils, which simplifies cabinet wiring. Control-cabinet heat dissipation starts at 100 W, and full-load cabinet losses reach 200 W, values that influence airflow and HVAC sizing. The unit is intended for the 3K3 climatic category, a maximum installation height of 2000 m, and an ingress rating of IP20, so it must be mounted inside a protected control bay.