Product Description:

The PSI65C0.789-W1 is a medium-frequency inverter manufactured by Bosch Rexroth Indramat for the PSI Frequency Inverters series. The unit converts three-phase plant power into regulated medium-frequency output that drives induction heating coils, weld transformers, and other high-current processes in automated production lines. By combining solid-state switching with closed-loop cooling, the product provides stable current shaping for equipment that must track changing load conditions while maintaining thermal limits inside a control cabinet.

Electrical performance centers on a switching clock of 1 kHz, which defines the carrier frequency applied to the output bridge and sets harmonic content in the secondary circuit. The inverter accepts a utility supply of 400 – 480 VAC on a 3-phase bus, while its logic layer is energized by 24 V DC. Peak conduction capability reaches 2400 A, yet continuous operation is designed around a 660 A nominal system current. Because the power stage is Water Cooled, 10 l/min of coolant at or below 30 °C removes the heat that generates a basic cabinet loss of 100 W and limits total enclosure dissipation to 850 W. A metal-oxide-varistor array clamps input transients, and cabinet wiring remains protected by MOV-based overvoltage suppression.

Integration details address the higher-power path. Transformer secondary pulses can rise to 120 kA, so the inverter permits outgoing conductors up to 120 mm² that are secured with M10 connection bolts. Liquid heat extraction capacity reaches 4400 W, handled through M16 × 1.5 water connections that fit standard hose couplings. Runtime sequencing relies on an EtherNet-based timer interface that aligns gate commands with plant controllers. An enclosure rating of IP20 confines installation to protected cabinets, rounding out the thermal and cabling provisions outlined above.