Product Description:

The PSI6300.349-L1 is a medium-frequency inverter in the PSI Frequency Inverters series manufactured by Bosch Rexroth Indramat. It accepts three-phase utility power and produces a controlled medium-frequency output that drives induction heaters, weld power supplies, or other equipment that requires tightly regulated high-current waveforms. By isolating the load through matching transformers, the inverter serves as the core of production cells where fast energy delivery and repeatable thermal profiles are required for consistent process quality.

It accepts a three-phase supply of 400–480 VAC, matched to factory grids operating at 50/60 Hz, while drawing a nominal mains current of 110 A during rated duty. Heat generated by power conversion is removed by the built-in air cooling path, limiting basic cabinet losses to 69 W and allowing a maximum of 170 W inside the enclosure, while an additional 360 W can be exhausted through the dedicated cooling channel. The protection rating of IP20 requires installation inside a closed control cabinet. For load surges, the power stage can deliver up to 800 A of primary current, and the inverter modulates its bridge to a carrier frequency of 1 kHz to achieve the required medium-frequency output. Communication and timing both use an INTERBUS link.

The logic section operates from a 24 VDC supply, and the integrated 2 A power unit supplies auxiliary current for sensors or contactors. A secondary current capacity of 36 kA shows that, when paired with suitable transformers, the inverter can sustain the extreme peaks demanded by short-circuit-resistant heating coils. Up to 256 individual programs may be stored, allowing quick selection of process recipes through the INTERBUS controller. Copper conductors up to 50 mm² fit the main terminals, and reliable function continues until the installation reaches a height of 2000 m above sea level.