PSI63C0.357-L2 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.357-L2 is a medium frequency inverter from the PSI Frequency Inverters series. It is air cooled, has a mains voltage range of 480 to 690 VAC, and features a degree of protection rated at IP20. The unit has an integrated power supply with 24 VDC output at a maximum of 2 Amps, and it weighs approximately 21 kilograms.
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Product Description:
Bosch Rexroth Indramat manufactures the PSI63C0.357-L2 as part of the PSI Frequency Inverters series. Classified as a medium-frequency inverter, this unit converts high-voltage three-phase mains power into controlled medium-frequency power for induction heating, shrink-fitting, and similar automated processes. By varying the output frequency, the inverter allows production equipment to match thermal energy precisely to the load. This controlled output can improve energy use and shorten process cycles while maintaining consistent operation.
For primary power, the inverter accepts a three-phase supply of 480–690 VAC at 50 or 60 Hz. The internal topology rectifies and switches this input, while an air-cooled heat sink removes heat generated by switching losses. Power loss is limited to 360 W, which must be considered when arranging cabinet ventilation and surrounding airflow. An integrated auxiliary rail eliminates the need for a separate control supply. It provides up to 24 VDC at 2 A for contactors, sensors, and fieldbus electronics. The broad input range supports installation on different industrial power systems, while the onboard low-voltage source keeps the connected control circuits energized when the main output is disabled.
The housing has a protection class of IP20, so the inverter must be installed inside a closed electrical cabinet and is protected against accidental finger contact. Operation is permitted from +10 to +55 °C, corresponding to the 3K3 climatic category in EN 60721-3-3 for temperature-controlled work areas. Storage and transportation are permitted at temperatures from -25 to +70 °C. A built-in INTERBUS timer coordinates heating cycles through the fieldbus without requiring separate discrete wiring for each command. The unit has an installation mass of 21 kg, which supports mounting on suitable panel studs or other load-rated cabinet hardware. Appropriate spacing around the enclosure allows cooling air to move across the heat sink without obstruction. Cabinet mounting also protects the open enclosure from conductive debris and unintended contact during normal machine operation.
