Product Description:

The PSI62C0.734-W1 is a medium-frequency inverter built by Bosch Rexroth Indramat for the PSI Frequency Inverters series. It converts a three-phase plant supply into a controlled high-current output used in induction heating, melting, and other precision energy-delivery tasks within industrial automation. By packaging power electronics, cooling interfaces, and protective circuitry in one cabinet, the unit streamlines system design for machine builders who need repeatable thermal profiles at the workpiece. Its compact footprint allows installation close to the load so that busbar length and associated losses stay minimal.

The inverter accepts a mains line of 400 – 480 VAC and draws a nominal input current of 220 A when operating at rated power. Heat generated in the IGBT stack is removed through an internal water channel, and with a coolant flow of 4 l/min the pressure drop remains at 0.6 bar. Under maximum switching duty, the liquid circuit must carry up to 700 W of thermal losses, while basic cabinet dissipation is limited to 210 W. The housing dimensions of 280 mm in depth, 288 mm in width, and 653 mm in height fit standard 600 mm control enclosures, and the required 95 mm² conductors can be routed through the lower gland plate without sharp bends.

Control electronics are fed from an auxiliary rail of 24 VDC that supports gate drivers, the EtherNet timer module, and diagnostics at 2 A. A protection rating of IP20 limits the unit to clean, closed cabinets while still allowing finger-safe access during service. The power stage can process primary currents up to 1200 A and forward secondary pulses reaching 54 kA, making it suitable for large induction coils that require steep current ramps. Even with this capacity, the enclosure weighs 56 kg and can be mounted using standard rail brackets.