Product Description:

The PSI63C0.333-L1 is a medium-frequency inverter produced by Bosch Rexroth Indramat for the PSI Frequency Inverters series. It changes standard three-phase plant power into regulated medium-frequency energy that feeds induction heaters, hardening generators, or other equipment that needs tightly controlled high-frequency current in automated lines. Within an automation cell, it also supplies discrete control signals, allowing close coordination with motion controllers and safety interlocks.

The inverter accepts a supply of 400 - 480 VAC and draws a nominal 110 A, setting the baseline for upstream fuses and busbars. An MOV stage handles transient overvoltage, and insulation is rated for 480 VAC phase to ground. Cooling relies on forced air through its perforated frame, yet the enclosure still achieves IP20 protection, which helps prevent accidental finger contact. The unit has a 3K3 classification for use in temperature-controlled production halls with low condensation. Control electronics run from a separate 24 VDC feed, landed on terminals that accept conductors up to 50 mm². Eight discrete inputs and eight discrete outputs give the machine PLC direct access to start, inhibit, or alarm lines without extra interface relays.

For load pulses, the power stage can supply up to 800 A, and the carrier operates at 1 kHz, providing concentrated energy with minimal skin-effect loss. Logic outputs are rated for 2 A, so contactor coils or brake valves can be driven directly, while timing is managed by the INTERBUS timer for synchronized machine cycles. Integrated temperature monitoring issues a shutdown before semiconductor limits are exceeded, even when the cabinet is installed at elevations reaching 2000 m. Air cooling, discrete diagnostics, and the MOV network support stable operation across the stated duty range.