Product Description:

The PSI62C0.733-W1 is a medium frequency inverter built by Bosch Rexroth Indramat and assigned to the PSI Frequency Inverters series. As a power-conversion module, it transforms three-phase plant power into controlled medium-frequency output for induction heating coils, resistance-welding transformers, and similar automation loads that need rapidly adjustable energy delivery. By providing this intermediate power stage, the unit allows production machinery to modulate heat profiles or current densities without mechanical switching components, which improves cycle accuracy and supports closed-loop process control.

The inverter accepts a supply of 400 - 480 VAC, matching standard industrial mains. Under continuous conditions, it delivers 220 A, and the output can be modulated up to 1 kHz, which is suitable for medium-frequency heating tasks. Control signals are handled through a 24 VDC logic system that can source 2 A for external relays, while the integrated EtherNet timer synchronizes firing sequences with PLC commands. Cable lugs sized for a 95 mm² cross-section accommodate the required conductor ampacity. Thermal loading inside the enclosure starts at 69 W of basic cabinet loss and can rise to 700 W during maximum cooling operation. Even at full output, the cabinet still dissipates 210 W to ambient air, separate from the coolant circuit.

Water cooling removes the bulk of the switching heat. A minimum flow of 4 l/min keeps the plate temperature stable and produces a pressure drop of 0.6 bar at that rate. When heavy transient demands occur, the inverter can draw 1200 A on the primary side and pass up to 54 kA through the secondary circuit, so the liquid circuit also helps protect the copper busbars from thermal fatigue. The mechanical package measures 653 mm high, 288 mm wide, and 280 mm deep and weighs 56 kg. These dimensions allow direct installation in medium-power cabinets without special bracing.