Product Description:

The PSI63C0.336-L2 medium frequency inverter is provided by Bosch Rexroth Indramat within the PSI Frequency Inverters series. The unit converts a three-phase high-voltage supply into a controlled medium-frequency output that can be used to drive specialized industrial loads or power electronic subsystems in an automation cell. By modulating voltage and current at kilohertz rates, the inverter permits precise energy delivery while remaining compatible with the protective and diagnostic infrastructure used on related drive platforms.

The power section accepts a mains input between 480 – 690 VAC and draws up to 110 A under rated operating conditions. During rapid load changes, the primary path can momentarily reach 800 A, a figure that sets the sizing of upstream fuses and busbars. Internal switching devices operate at a fundamental frequency of 1 kHz to create the medium-frequency waveform. Continuous conversion generates a basic cabinet heat dissipation of 100 W, and with full load the combined losses inside the enclosure can rise to 200 W, so the air-cooled design can handle permissible cooling losses of 420 W to maintain semiconductor temperatures. An IP20 housing limits access to live parts, while the terminal blocks accommodate conductors up to 50 mm².

The inverter includes an auxiliary supply delivering 24 VDC at up to 2 A for control electronics and contactors. Up to 256 programs can be stored, and command sequencing is coordinated through the INTERBUS timer interface. Installation guidelines call for a minimum clearance of 100 mm and cables no thinner than 35 mm², and the built-in terminals clamp conductors of that gauge directly. Operation is specified up to 2000 m above sea level without output derating. For safety coordination with medium-voltage transformers, the secondary circuit can withstand fault currents up to 36 kA.