PSI64C0.637-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI64C0.637-W1 is a medium frequency inverter from the PSI Frequency Inverters series. This water cooled unit supports a mains voltage of 400 to 480 VAC and has a nominal mains current of 220 Amps. It features 8 discrete inputs and outputs, an I/O module voltage of 24 VDC, and uses an HDFK lead-through terminal type.
Internal Product Review
The PSI64C0.637-W1 is a medium frequency inverter with water-cooled construction for efficient thermal control. Technical performance is impressive with 400 - 480 VAC mains voltage and a 220 A nominal current for demanding industrial power stages. A strong choice for high-capacity installations, highlighted by the 1000 Hz sequence frequency.
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Product Description:
The PSI64C0.637-W1 is a medium-frequency inverter produced by Bosch Rexroth Indramat under the PSI Frequency Inverters series. The unit converts three-phase mains power into controlled medium-frequency energy that drives induction heaters, weld generators, or similar loads in automated lines. By delivering adjustable current and frequency, it serves as the central power source for processes that need fast thermal response or precise electromagnetic fields within industrial automation cells. Its compact water-cooled cabinet simplifies integration into OEM machine frames while limiting electrical losses to the surrounding enclosure.
The inverter accepts supply voltages from 400 - 480 VAC and draws a mains nominal current of 220 A, yet it is engineered to withstand momentary demands up to 1600 A on the primary side when heavy loads are started. An internal power section switches at a sequence frequency of 1000 Hz, producing a smooth medium-frequency waveform. Thermal design accounts for component dissipation, and maximum cooling losses reach 700 W. Base cabinet losses are 69 W and rise to 210 W at maximum duty, while the water-cooled plate is linked to the plant circuit and power conductors enter through HDFK lead-through terminals sized for the required high-current path.
Proper operation requires a coolant flow of 4 l/min, and at that flow the exchanger exhibits 0.6 bar at 4 l/min of pressure drop for stable circulation. Conductors of up to 95 mm² carry the output without excessive temperature rise. Control and diagnostics are handled by eight discrete inputs, eight discrete outputs, and a DeviceNet-compatible timer function. The I/O module is energized from 24 VDC and draws 2 A, while a 0.1 A analog signal output with 8-bit pressure resolution is available for feedback to the PLC.
