PSI63C0.789-W2 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.789-W2 is a medium frequency inverter from the PSI Frequency Inverters series. It is water cooled with an IP20 degree of protection and weighs approximately 25 kg. The integrated power supply unit delivers a maximum output current of 2 Amps at 24 VDC, and the inverter operates on mains voltages between 480 and 690 VAC at frequencies of 50 or 60 Hz.
Internal Product Review
The PSI63C0.789-W2 is a medium frequency inverter with water-cooled thermal management, well suited for stable operation in high-demand installations. Support for 480 to 690 VAC mains input and 50 or 60 Hz service makes integration straightforward across a wide range of industrial power systems. An integrated 24 VDC power supply rated to 2 A adds useful control-side support and rounds out a very capable inverter package.
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Product Description:
The PSI63C0.789-W2 is a medium-frequency inverter manufactured by Bosch Rexroth Indramat for the PSI Frequency Inverters series. It converts high-voltage three-phase mains power into a controlled medium-frequency output used to energize induction heaters, resonant test rigs, and other specialized loads in automated plants. The unit integrates a supervisory supply, an Ethernet-based timing interface, and a liquid cooling circuit, allowing installation inside dense control cabinets while limiting heat transfer to neighboring electronics.
Heat is removed through a water-cooled plate, allowing the cabinet to remain sealed against airborne contaminants. The housing has an IP20 protection rating, preventing finger contact with live conductors while relying on the host enclosure for additional sealing. Control boards receive power from an internal regulator that supplies 24 VDC at up to 2 A, providing power for contactors, sensors, and fieldbus transceivers. The input stage accepts utility power from 480–690 VAC, matching the high-voltage distribution systems used in heavy industry. Climatic category 3K3 per EN 60721-3-3 indicates suitability for temperature-controlled switch rooms. The Ethernet timer supports synchronized starts and stops commanded by a PLC, allowing the inverter to coordinate its output with automated processes.
The rectifier and IGBT bridge accept source frequencies of 50 or 60 Hz, allowing operation with common industrial power systems. During sustained output, the coolant circuit must dissipate up to 420 W of semiconductor loss, so coolant flow and inlet temperature must be selected accordingly. The permitted ambient operating temperature ranges from +10 to +55 °C, while unpowered storage is permitted from -25 °C to +70 °C. The inverter weighs approximately 25 kg, so the panel and mounting hardware must provide adequate support for the installed unit. Its liquid connections should remain accessible for routing coolant lines and inspecting fittings without obstructing nearby electrical connections.
