Product Description:

The PSI64C0.325-W1 is a medium-frequency inverter manufactured by Bosch Rexroth Indramat and supplied in the PSI Frequency Inverters series. It converts three-phase factory mains into controlled medium-frequency power for induction heating lines, forging furnaces, and other automated processes that require tightly regulated energy delivery. Integrated closed-loop control allows the unit to exchange status data with supervisory systems and manage real-time power flow between the mains transformer and the load coils. The inverter is intended for process equipment that depends on repeatable power delivery across changing heating cycles.

It operates from a three-phase input range of 400 – 480 VAC and draws a mains nominal current of 220 A during rated operation. Internal losses under standard load are limited to 69 W, while cabinet dissipation can rise to 210 W when the inverter is driven at maximum modulation depth. The assembly is water-cooled, requiring at least 4 l/min of flow with a pressure drop of 0.6 bar across the heat exchanger. Water cooling removes most heat through the exchanger instead of releasing it directly into the cabinet air, which helps in enclosed installations. Protection level IP20 prevents accidental finger contact, and the housing stands 653 mm high, 288 mm wide, and 280 mm deep for switchgear integration. A 95 mm² line conductor carries the supply, the 24 VDC auxiliary output rated at 2 A can feed external control devices, and INTERBUS timing circuitry coordinates gating patterns with the plant PLC.

For short bursts, the cooling circuit must remove up to 700 W of heat. The primary bus can momentarily supply 1600 A, and the isolated secondary can tolerate fault currents up to 54 kA. These current limits are relevant to the upstream transformer and protective devices. The enclosure weighs 40 kg. Clearance is required for the water connections and front-panel diagnostics so the unit can be mounted and accessed properly.