Product Description:

The PSI6200.750-W1 belongs to the PSI Frequency Inverters series manufactured by Bosch Rexroth Indramat. Classified as a medium-frequency inverter, it converts three-phase mains power into regulated medium-frequency power for induction heating, welding, or smelting equipment on automated lines. Its integrated low-voltage logic stage and internal sequencing allow the unit to coordinate with PLCs and process controllers. Ethernet timer functions support process timing, while the MOV-based overvoltage circuit protects downstream components from line transients.

This inverter accepts a mains voltage of 400 to 480 VAC at 50 or 60 Hz and can deliver a maximum output current of 1200 A with a nominal system current of 220 A. Switching events are paced by a 1 kHz clock frequency, and the control electronics draw a 24 V DC supply that can be furnished by the built-in 2 A auxiliary power source. An enclosure rating of IP20 permits installation inside ventilated cabinets while protecting against accidental contact with internal components. The water-cooling circuit requires a flow rate of 4 liters per minute and inlet water below 30 °C. It connects through an M16 × 1.5 fitting and removes cooling losses that can reach 420 W during peak operation. Communication and diagnostic signals pass through an X1 9-pin D-Sub port, and control programs are retained in nonvolatile memory when the equipment is not operating.

A backup battery rated at 3.6 V preserves real-time data when mains power is absent, supporting cycle timing managed by the Ethernet timer. The logic accommodates 256 selectable job sequences, while secondary current can peak at 54 kA for use with resistance-welding transformers. Operation is permitted at ambient temperatures from +10 °C to 55 °C within the 3K3 climatic category. The inverter can be installed at elevations up to 2,000 meters above sea level. Storage temperatures may range from -25 °C to +70 °C, and the housing has a mass of 25 kg for cabinet mounting.