PSI65C0.751-W1 Bosch Rexroth Indramat
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MPN: R911330647
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The Bosch Rexroth Indramat PSI65C0.751-W1 is a medium frequency inverter from the PSI Frequency Inverters series, designed with water cooling and a maximum water inlet temperature of 30 degrees Celsius. It supports 400 to 480 VAC mains voltage, handles a nominal system current of 660 Amps, and provides a maximum output current of 2400 Amps. The inverter has an IP20 protection rating and operates at altitudes up to 2000 meters.
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Product Description:
The PSI65C0.751-W1 medium-frequency inverter is produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. As a stand-alone power conversion stage, it transforms three-phase mains power into adjustable medium-frequency current that feeds induction coils, melting furnaces, or other process loads that benefit from precise thermal control. In automated lines, this inverter provides stable current modulation so temperature profiles follow programmed recipes and component quality remains consistent.
The mains voltage range of 400–480 VAC allows connection to standard factory supplies without a step-up transformer. Under rated conditions, the converter delivers a nominal system current of 660 A, while transient peaks can rise to a maximum output current of 2400 A; this margin covers startup or sudden load changes. Its secondary side can sustain up to 120 kA, enabling high coupling currents through the workpiece. Internal switching and filtering dissipate 850 W of cabinet power at maximum output, so proper water circulation is essential. To route the supply conductors, the terminal bar accepts 120 mm² cables secured with M10 bolts. The unit is water-cooled, and coolant enters through an M16 × 1.5 threaded connection. The maximum permitted coolant inlet temperature is 30 °C. Timing, diagnostics, and recipe calls are exchanged over an integrated Ethernet timer interface.
The base heat load during standby is 100 W, but when the inverter operates at full secondary current, the cooling circuit must remove up to 4400 W of losses. A flow rate of 10 L/min keeps semiconductor junctions within safe limits and prevents scale formation in the channels. The enclosure carries a protection rating of IP20, so it must be mounted inside a closed cabinet while remaining accessible for service. Operation is permitted at altitudes up to 2,000 m. The water-cooled design limits acoustic noise and eliminates the need for large air ducts, making the unit easier to integrate into compact process panels.
