PSI65C0.779-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI65C0.779-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It features a TriCore CPU, 256 program capacity, and supports a control cycle time of 1 millisecond. The unit is water cooled with a maximum cooling loss of 4400 W and operates with a mains voltage range of 400 to 480 VAC.
Internal Product Review
PSI65C0.779-W1 is a medium frequency inverter designed for demanding industrial power control, featuring water-cooled operation and a 400 to 480 VAC mains voltage range. A 1 ms control cycle paired with a TriCore CPU supports fast, stable response in high-load applications. Strong thermal management with 10 l/min minimum water flow makes the unit an excellent choice for continuous-duty installations.
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Product Description:
The PSI65C0.779-W1 is a medium-frequency inverter produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. The unit takes a three-phase factory supply, modulates it through high-frequency switching, and delivers regulated output energy for induction heating, welding, or resonant power supplies in industrial automation. By embedding power electronics and closed-loop control in a single cabinet, the inverter simplifies energy conversion tasks on the plant floor.
Input compatibility spans 400 – 480 VAC, letting the device operate on common low-voltage power networks without an isolation transformer. Digital regulation is updated on a 1 ms control cycle, so current and voltage remain stable during rapid load swings. Under heavy operation, heat removed by the water circuit can climb to 4400 W, while static cabinet dissipation is 100 W and rises to 850 W at maximum inverter utilization. The primary bus can deliver up to 2400 A, and through the internal step-up topology, the secondary winding can conduct pulses as high as 120 kA for short-duration, high-current applications. A water-cooled plate extracts junction heat continuously and is required for rated current operation.
Thermal management is anchored by a brazed stainless manifold; the fittings use the M16x1.5 cooling thread, and flow must stay above 10 l/min to prevent localized boiling. When that flow is maintained, the pressure drop across the exchanger remains near 0.65 bar, so standard factory chillers can be used. A Bosch-designed TriCore CPU oversees pulse generation, EtherNet timer synchronization, and the 256-step program table that stores parameter sets for different workpieces. Mechanical integration uses M10 power terminals, M6 mounting bolts tightened to 6 Nm, and control wiring secured by the cabinet’s connection screws for secure installation.
