PSI6300.108-L1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI6300.108-L1 is a medium frequency inverter in the PSI Frequency Inverters series, featuring an air cooled design and IP20 degree of protection. It operates with a mains voltage of 400 to 480 VAC and a nominal current of 110 A, with a maximum primary current of 800 A. The integrated supply voltage is 24 VDC with a maximum current of 2 A, and the inverter weighs 20 kilograms.
Internal Product Review
The PSI6300.108-L1 is a Bosch Rexroth Indramat medium frequency inverter built for demanding industrial power conversion. Operation on 400 to 480 VAC with a 110 A mains nominal current gives the unit strong electrical capability for high-load applications. Air-cooled construction and IP20 protection make this inverter a dependable choice for controlled cabinet installations.
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Product Description:
The PSI6300.108-L1 medium-frequency inverter is built by Bosch Rexroth Indramat for the PSI Frequency Inverters series. The unit converts three-phase mains power into a controllable medium-frequency output for induction heating, welding, and other automation processes that need concentrated energy above line frequency. By combining the power stage, control electronics, and a standard CPU in one housing, the inverter provides a self-contained drive section. This integrated layout keeps the main control functions close to the switching hardware and supports direct coordination of process timing through a discrete I/O interface.
The converter accepts a three-phase input of 400–480 VAC and draws a nominal line current of 110 A while remaining within the enclosure’s IP20 protection class. Internally, air-cooled heat sinks remove 69 W of base cabinet loss and 170 W at maximum inverter load, and total thermal removal can reach 360 W under worst-case cooling calculations. During dynamic heating cycles, the power section can reach a primary current crest of 800 A while generating a regulated output at 1 kHz. The cabinet layout reserves space for straight-through airflow from the bottom plenum so heat can move upward through the cooling path rather than collecting around the power devices.
On the induction transformer side, the companion PSG 3100 secondary can tolerate peaks of 36 kA, allowing wide load variation without saturation. System weight is 20 kg, which reduces mechanical strain when the unit is mounted in swing-out frames or compact cabinets. Field wiring uses a minimum conductor cross-section of 35 mm² to limit voltage drop and keep cable temperature within the recommended range at full current. An integrated 24 VDC auxiliary bus rated at 2 A powers sensors, contactors, and the timer stage directly from the inverter logic, which lets the process sequence run without a separate low-power supply.
