Product Description:

The PSI6200.257-W1 frequency inverter is built by Bosch Rexroth Indramat and belongs to the PSI Frequency Inverters series. As a medium-frequency inverter, it converts three-phase plant power into a regulated high-frequency output used to energize induction heating coils, melting furnaces, or similar automated processes that demand precise power modulation. Within an automation cell, it acts as the power stage between the mains supply and the induction load, responding to PROFIBUS commands from the higher-level controller. This arrangement supports repeatable heating control in production systems where output must track changing process demand.

The unit accepts three-phase supplies in the range of 400 – 480 VAC at 50/60 Hz through TN or TT mains networks, and it draws a nominal 220 A under rated conditions. Its internal power section can dissipate up to 700 W of thermal energy, so water cooling is used, and the cabinet retains an enclosure rating of IP20. The inverter generates a carrier-based output up to 1 kHz, allowing tight control of the magnetic field in workpieces. All operating parameters and timing functions are exchanged over the PROFIBUS interface, which is duplicated for both I/O and the integrated timer. Physically, the housing measures 653 mm in height, 288 mm in width, and 280 mm in depth, which supports placement in standard control racks.

Process peaks are handled by a maximum primary line current of 1200 A, provided that the cooling loop delivers a minimum flow of 4 l/min and maintains approximately 0.6 bar pressure drop across the heat exchanger. The auxiliary supply offers 24 VDC at 2 A for gate drivers and diagnostic electronics, keeping control boards energized during standby states. A transport mass of 56 kg must be considered when planning panel installation and lifting provisions. These operating limits should be observed when the inverter is installed in medium-frequency induction systems.