PSI6100.146-L1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI6100.146-L1 is a medium frequency inverter from the PSI Frequency Inverters series. It operates with a control supply voltage of 24 V DC and a mains voltage of 400 to 480 VAC, providing a maximum output current of 400 Amps. The unit uses air cooling and offers IP20 protection.
Internal Product Review
The PSI6100.146-L1 is a capable medium frequency inverter with 400 - 480 VAC mains voltage. Air-cooled design and IP20 protection support dependable performance in enclosed industrial installations. A 400 A maximum output current makes the unit an excellent choice for high-demand power applications.
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Product Description:
The PSI6100.146-L1 is a medium-frequency inverter produced by Bosch Rexroth Indramat for the PSI Frequency Inverters series. It converts three-phase plant power into controlled medium-frequency energy for induction heating, brazing, and similar industrial processes, providing regulated current and voltage that help maintain precise thermal profiles in automated production cells. When paired with a dedicated transformer and process coil, the unit supports rapid ramp-up and stable hold periods in high-throughput forging lines and other heat-based manufacturing systems. Its controlled output is suited to applications that require repeatable heating cycles and fast process response.
An internal oscillator pulses the IGBT bridge at 1 kHz, producing a near-sinusoidal medium-frequency waveform that helps reduce eddy losses in the workpiece. Control logic and the auxiliary timer are energized from a separate 24 V DC line, which isolates signal electronics from the main bus. The power section accepts supply ranges of 400–480 VAC and can furnish up to 400 A of continuous output to the coil. Short, high-energy demands are supported by a permissible secondary crest of 20 kA, while forced-air channels guide heat away from semiconductors and inductors during sustained operation. Basic cabinet loss is 69 W at idle and rises to 170 W at rated throughput, while full-load cooling loss can reach 360 W.
For mounting inside a switchboard, a clearance of 100 mm around the heat exchanger inlet and outlet is required to sustain the intended airflow. The busbars are rated for a nominal system current of 110 A, and the power terminals accept crimped conductors up to 50 mm². The enclosure has an IP20 protection level for installation in dry, finger-safe cabinets, and integrated metal-oxide varistors clip overvoltage events across the DC link to help limit component stress during line transients.
