Product Description:

The PSI63C0.787-W1 belongs to the PSI Frequency Inverters series produced by Bosch Rexroth Indramat. Classified as a medium-frequency inverter, it conditions three-phase power for induction generators, welding transformers, and other plant loads that need tightly regulated kilohertz output. Ethernet connectivity allows direct integration with PLC networks, while the built-in TriCore processor executes real-time current, voltage, and temperature control loops that keep the power stage stable during rapid duty-cycle changes.

The input section accepts 400–480 VAC and draws a nominal 110 A, which establishes the feeder and protection requirements for the cabinet. Inside the converter, a water-cooled bus bar carries up to 800 A of primary current. The heat exchanger must receive at least 4 L/min of coolant to keep semiconductor junctions within safe operating limits. At this flow rate, the hydraulic circuit experiences a pressure drop of 0.1 bar, so low-head plant chillers can support the cooling circuit. Ethernet I/O and an Ethernet-based timer coordinate firing angles with other drives over a common backbone, reducing latency between motion and heating profiles. Cable planning is simplified by a minimum conductor cross-section of 35 mm² and a maximum terminal capacity of 50 mm², helping conductor temperature remain within IEC guidelines.

On the secondary side, the inverter can supply up to 36 kA when paired with a PSG 3100 transformer, providing enough current for thick workpieces or short welding cycles. Control wiring uses shielded twisted pairs routed beside the TriCore CPU service port for access to diagnostic functions. The enclosure measures 239 mm wide, 463 mm high, and 280 mm deep, allowing it to fit standard 300 mm cabinet frames while leaving space for bypass contactors and water manifolds. The cooling loop must maintain continuous flow, and the integrated sensor shuts down the inverter if the coolant velocity drops to a level that could cause overheating.