Product Description:

The PSI6100.336-L1 is a medium-frequency inverter produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. Designed for variable-speed control of induction heaters and related loads, the unit converts three-phase mains power into a regulated high-frequency output. This controlled output supports precise thermal processing in automated production lines where repeatable power delivery is required.

At the input stage, the inverter accepts a three-phase supply of 400–480 VAC from TN, TT, or IT networks and operates at 50/60 Hz. An auxiliary supply of 24 VDC powers the logic and gate drivers, allowing the control electronics to remain active during line disturbances. Internally, a three-phase medium-frequency topology produces the carrier waveform, while an air-cooled channel removes heat through forced airflow. The inverter requires vertical mounting against the rear panel to maintain unrestricted airflow around the cooling surfaces. Component surfaces have an IP20 protection rating, so the inverter must be installed inside an IP54 enclosure where condensation is prevented. At ambient temperatures up to 45 °C, the inverter modulates its bridge to provide an output frequency of 1 kHz. Metal-oxide varistors limit overvoltage transients and protect the power semiconductors from excessive phase-to-ground voltage.

The climatic classification of 3K3 indicates suitability for control cabinets exposed to moderate temperature, humidity, and dust, but not active dripping water. Continuous operation is permitted at altitudes up to 2000 m; operation above this elevation requires derating to compensate for the lower air density available for cooling. On the output side, the inverter generates a PWM waveform that provides low harmonic distortion at high switching speeds and supports induction heating coils and specialized resonant loads. An INTERBUS-based timer coordinates enable signals with external motion controls or PLC sequences. The DC-link protection network also suppresses mains transients before they can place excessive electrical stress on internal switching components. Proper enclosure ventilation is necessary to maintain the permitted operating temperature and preserve the effectiveness of the forced-air cooling path.