PSI6300.750-L1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI6300.750-L1 is a medium frequency inverter from the PSI Frequency Inverters series. It supports a mains voltage range of 400 to 480 VAC, handles a maximum output current of 800 Amps, and has a nominal current of 110 Amps with a 3-phase configuration. The inverter is air cooled, features a protection rating of IP20, and weighs 20 kilograms.
Internal Product Review
The PSI6300.750-L1 is a medium frequency inverter built for stable 3-phase operation on 400 to 480 VAC mains. Air-cooled construction and IP20 protection support dependable cabinet integration in controlled industrial environments. The 800 A maximum output current stands out for demanding power conversion service.
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Product Description:
The PSI6300.750-L1 is a medium-frequency inverter manufactured by Bosch Rexroth Indramat and supplied within the PSI Frequency Inverters series. It is designed for inductive heating, welding, and other automation tasks that require precisely modulated medium-frequency power. The unit converts three-phase utility energy into a controlled output that can be synchronized with motion or process controllers through an EtherNet timer interface.
It accepts a mains input of 400-480 VAC on a 3-phase supply and delivers up to 800 A of output current, while its continuous rating is set at 110 A. This distinction allows short bursts of high current without oversizing the cabinet busbars. A switching pattern generated at 1 kHz shapes the medium-frequency waveform, giving a balance between transformer size and output ripple. Logic and gate drivers are powered from an isolated 24 V DC control supply that keeps the main power stage disabled during service work. The enclosure carries an IP20 protection rating, so it must be mounted inside a guarded panel while still allowing straightforward access to the 50 mm² line terminals and 35 mm² load wiring. The inverter also supports a maximum secondary current of 36 kA for short durations, providing sufficient headroom for low-impedance loads.
Thermal management is handled by an air-cooled design that draws cabinet air no hotter than 45 °C across the heat sinks. At nominal load, this produces a basic cabinet loss of 69 W, and it rises to 170 W when the inverter operates at maximum power. Additional process-side losses can reach 360 W, so airflow must be sized accordingly. The electronics remain functional up to an ambient limit of 55 °C, which permits installation close to furnaces or annealing lines without external chillers. Overall mass is 20 kg, and the assembly connects through an EtherNet timer for accurate cycle coordination with PLC sequences.
