PSI64C0.632-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI64C0.632-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It features a maximum output current of 800 Amps and operates with a control supply of 24 V DC. The inverter is water cooled, accommodates a mains voltage of 400 to 480 VAC, and is protected to the IP20 standard.
Internal Product Review
PSI64C0.632-W1 is a Bosch Rexroth Indramat medium frequency inverter with water-cooled construction and 400 - 480 VAC mains voltage compatibility. A 1 kHz clock frequency paired with 1 ms time resolution supports stable process control and responsive output behavior. Strong current delivery remains a standout advantage, highlighted by an 800 A maximum output current.
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Product Description:
The PSI64C0.632-W1 medium-frequency inverter is produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. In resistance welding and induction-heating lines, the unit converts plant mains power into controlled medium-frequency output for precise energy delivery to transformers and loads. Its role in automation is to maintain stable current waveforms while the higher-level controller synchronizes process timing through the built-in DeviceNet timer interface. This type of inverter is suited to processes where repeatable pulse control is needed for consistent heating or welding results.
The inverter accepts a three-phase input of 400 – 480 VAC. Internal logic runs from a 24 V DC control supply, which keeps diagnostics active during short mains drops. A protection level of IP20 suits mounting inside a closed cabinet. Switching devices can dissipate up to 420 W, and that heat is removed by a closed-loop water circuit that requires 4 L/min of flow with water no warmer than 30 °C. Nominal system current is 110 A, while the power stage can tolerate short overloads up to 800 A. Process commands are handled at a 1 kHz clock rate, and the cabinet layout must provide space for both power wiring and coolant routing.
The power stage is dimensioned for secondary currents up to 36 kA, which suits medium-frequency welding transformers that require very high pulse amplitudes. Reliable operation is maintained in ambient temperatures as high as 55 °C, provided the inverter is mounted inside an enclosure and the water cooler runs continuously. Cycle timing inside the control logic uses a 1 ms time resolution, allowing deterministic switching of the output contactor. The water-cooled structure connects through a M16x1.5 port, and the piping is sized to match the stated flow. Field wiring lands on terminals that accept conductors up to 50 mm², while auxiliary circuits use conductors up to 35 mm². The terminal sizes support heavy power conductors on the main connections without crowding the auxiliary wiring area.
