PSI65C0.720-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI65C0.720-W1 is a medium frequency inverter from the PSI Frequency Inverters series, weighing approximately 25 kilograms. It operates with a mains voltage of 400 to 480 VAC and a frequency of 50 or 60 Hz. This water-cooled unit has an IP20 degree of protection and supports an integrated power supply output of 24 VDC at up to 2 Amps.
Internal Product Review
The PSI65C0.720-W1 is a medium frequency inverter with water-cooled construction for efficient thermal management. Operation on 400 to 480 VAC and 50 or 60 Hz supports straightforward integration into established industrial power systems. A well-engineered inverter for stable performance in demanding drive applications.
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Product Description:
The PSI65C0.720-W1 is a medium-frequency inverter produced by Bosch Rexroth Indramat for the PSI Frequency Inverters series. As part of drive packages that power induction-heating coils and similar loads, the unit converts plant-level three-phase power into the regulated medium-frequency output required by resonant load circuits. In integrated production cells, it interfaces with programmable controllers through an internal Ethernet timer channel for coordinated energy delivery and sequencing logic. The compact enclosure and embedded 24 V auxiliary supply simplify cabinet wiring for automated systems.
The power stage accepts a three-phase supply of 400–480 VAC, allowing direct connection to common industrial grids without an autotransformer. The supported line frequency is 50 or 60 Hz, making the inverter compatible with regional power standards. A galvanically isolated auxiliary rail delivers 24 VDC at a maximum current of 2 A. This low-voltage source can power contactors, sensors, or internal control electronics. The assembly is water-cooled, so heat extracted from the IGBT modules is transferred to an external chiller. Liquid circulation helps maintain stable semiconductor junction temperatures during continuous high-current operation.
The sheet-metal housing has an IP20 protection rating, so the inverter must be mounted inside a control cabinet to protect live parts from accidental contact and limit the entry of solid objects. Its 3K3 classification according to EN 60721-3-3 permits operation in production areas with moderate temperature, humidity, and nonconductive contamination. During full-output operation, the cooling circuit must absorb up to 420 W of thermal losses. This heat load should be considered when selecting the external heat exchanger and circulation pump. The unit has an installed mass of 25 kg, which must be considered when selecting cabinet supports and mounting hardware. Adequate clearance around the enclosure also supports cable routing, coolant connections, and access to the inverter within the control cabinet.
