PSI63C0.789-L1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.789-L1 is part of the PSI Frequency Inverters series and is a medium frequency inverter with an air-cooled design. It operates at a mains voltage of 400 to 480 VAC, supports a mains frequency of 50 or 60 Hz, and provides an integrated power supply output of 24 VDC at 2 Amps. The inverter has IP20 protection, a weight of approximately 20 kilograms, and operates within a temperature range of +10 to +55 degrees Celsius.
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Product Description:
Bosch Rexroth Indramat manufactures the PSI63C0.789-L1 as part of its PSI Frequency Inverters series. This medium-frequency inverter converts fixed three-phase mains power into a regulated output for induction heating, soldering, and process power stages used with metalworking furnaces. Its control electronics coordinate switching sequences so the commanded frequency, voltage, and current reach the connected load with the required accuracy. The unit is intended for industrial automation systems that require controlled power delivery during precisely timed production processes.
The inverter connects to three-phase supplies rated at 400–480 VAC and operates at grid frequencies of 50 or 60 Hz, allowing direct connection to common industrial power networks. An internal auxiliary source provides 24 VDC at up to 2 A for relays, sensors, or drive interlocks, reducing the number of separate power components required in the cabinet. Heat generated by the IGBTs and rectifiers produces up to 360 W of cooling losses, so the air-cooled design requires unobstructed intake and exhaust paths. The housing has an ingress protection rating of IP20, which prevents accidental finger contact but requires installation inside a closed electrical cabinet. Control commands and time-critical triggers reach the unit through an Ethernet timer channel, supporting the deterministic frequency ramps required by many heating profiles. Adequate spacing around the enclosure allows cooling air to move freely and provides access to the power and control connections.
The inverter complies with climatic class 3K3 under EN 60721-3-3, indicating that its electronics can withstand moderate humidity and nonconductive dust during operation. Continuous operation is permitted within an ambient temperature range of +10 to +55 °C. When de-energized, the unit may be stored or transported at temperatures from -25 °C to +70 °C. The enclosure has a mass of 20 kg, so the mounting surface and surrounding cabinet structure must support the unit securely. Appropriate lifting equipment should be used when positioning the inverter to prevent damage to the enclosure or mounting points. The cabinet layout must also leave sufficient clearance for cable routing and routine access to the electrical terminals.
