PSI64C0.181-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI64C0.181-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It operates with a mains voltage of 400 to 480 VAC and a nominal current of 220 Amps. Featuring water cooling, the inverter achieves maximum cabinet losses of 210 Watts and requires a minimum water flow of 4 liters per minute.
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Product Description:
The PSI64C0.181-W1 is a medium-frequency inverter manufactured by Bosch Rexroth Indramat as part of the PSI Frequency Inverters series. It converts plant-level mains power into controlled medium-frequency output for tasks that need precise energy dosing in automated systems. A TriCore CPU executes the modulation algorithms, while a discrete 24 V I/O interface exchanges start, stop, and fault signals with a PLC. The unit is water-cooled, so thermal energy is routed away from the cabinet instead of being released into the surrounding air, and installation requires 100 mm of free space above and below the housing for service access. This layout helps keep nearby electrical components from absorbing unnecessary heat during operation.
The power section accepts a three-phase supply of 400 - 480 VAC and draws a nominal line current of 220 A during rated operation. On the primary bus, current can rise to 1600 A in short duty cycles, while the matching PSG 3100 transformer delivers up to 70 kA on the secondary side for the connected load. Heat removed by the internal cold plate is limited to 700 W, and maintaining that rating requires a minimum coolant flow of 4 l/min. If those cooling conditions are not maintained, the controller derates to protect the semiconductor junctions from overheating. The control platform therefore depends on stable coolant circulation as much as it does on the incoming electrical supply.
Even in standby, cabinet basic losses are 69 W, and they rise to 210 W at maximum output, so panel ventilation must accommodate this base load. The power terminals accept copper bars with a cross-section of 95 mm², matching the high current capability and helping keep conductor temperature within IEC limits. Mechanical fastening uses M6 bolts tightened to 6 Nm, and bolt access is kept clear by the specified mounting gap. With a pressure drop of 0.6 bar at the minimum flow, the cooling loop can be integrated into standard factory water circuits without excessive pump demand. The busbar connection style also supports firm contact surfaces and orderly cable routing inside the enclosure.
