PSI64C0.762-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI64C0.762-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It features water-cooled operation with cabinet losses of 210 W and max cooling losses of 700 W, and operates at mains voltages between 400 and 480 VAC with a nominal current of 220 A. The inverter includes Profinet fieldbus communication, supports 256 programs, and has serial inputs and outputs of 208 and 160 respectively.
Internal Product Review
The PSI64C0.762-W1 is a water-cooled medium frequency inverter built for demanding process control. Profinet communication and 256 program capacity support flexible integration and repeatable sequencing in automated cells. With 220 A nominal mains current across 400 to 480 VAC service, this unit stands out for stable high-power inverter performance.
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Product Description:
The PSI64C0.762-W1 is a medium-frequency inverter produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. It converts three-phase mains power for induction heating, welding, or other processes that demand precisely regulated medium-frequency energy. By modulating current and voltage, the unit supplies controlled power to a matching transformer or work coil, forming the central power stage in automated production cells. Stable output control helps the process maintain repeatable energy delivery when operating conditions change during production.
This inverter connects to grids rated at 400 – 480 VAC and draws a nominal input of 220 A; these figures set the upstream protection and cabling requirements. When a fast thermal ramp is needed, the current on the primary side can rise to 1600 A for short intervals, allowing high peak power without oversizing the line feeder. Water is the sole cooling medium, and a pressure drop of 0.6 bar at 4 l/min across the internal channels confirms that the plate heat exchanger is sized for plant water circuits. The housing accepts power leads up to 95 mm², enabling low-loss delivery of the rated current while maintaining acceptable temperature rise in the conductors. Integrated 24 VDC electronics, supplied at 2 A, support local control and diagnostics, while a Profinet interface links the inverter to the main PLC for process coordination and status exchange.
Total heat removed by the coolant can reach 700 W during maximum switching losses, so flow must not fall below the specified 4 l/min. On the secondary side, the power stage is rated for fault currents up to 54 kA when used with a PSG 3100 transformer, matching the safety needs of high-energy induction systems. Process precision is aided by a sequence frequency of 1000 Hz, giving fine resolution for pulse patterns stored in up to 256 user programs. Timing of those sequences is handled by an Ethernet-based timer, and the embedded I/O provides 208 digital inputs and 160 digital outputs for machine interlocks and sensor feedback. This arrangement allows the inverter to respond quickly to external commands and process state changes without requiring separate timing hardware.
