Product Description:

The PSI6300.176-L2 is a medium-frequency inverter built by Bosch Rexroth Indramat as part of the PSI Frequency Inverters series. In automated production cells, it converts a three-phase high-voltage mains feed into a controllable medium-frequency output that drives induction heating coils, melting furnaces, or other resonant loads. The unit bridges plant-level power distribution and the process equipment, providing precise current regulation, programmable run profiles, and diagnostic interfaces required for repeatable thermal cycles and energy management within industrial automation lines. Because it is air-cooled and designed for cabinet installation, the inverter integrates easily into switchgear racks while still meeting airflow and service access requirements.

The power section accepts a three-phase supply between 480 – 690 VAC, rectifies it, and delivers up to 800 A of inverter current to the secondary circuit, while continuous current draw is limited to 110 A. Dissipation inside the enclosure stays under 200 W, so the air-cooled design is sufficient as long as inlet air does not exceed 45 °C. Control electronics rely on a separate 24 V DC feed that also energizes the 24 V timer circuits. A 3.6 V lithium cell maintains memory when all external power is removed, and a 1 kHz clock governs the switching sequence. The inverter has a protection rating of IP 20, so it must be placed in a closed cabinet. Power lugs accommodate conductors from 35 mm² up to a terminal capacity of 50 mm², minimizing connection losses.

Configuration flexibility is provided by storage for 256 individual programs, allowing rapid selection of process recipes. When connected to a PSG 3100 transformer, the inverter can supply a peak secondary current of 36 kA for short bursts. The inverter can operate at ambient temperatures up to 55 °C and at installation sites as high as 2000 m, provided cooling air meets the specified limits.