PSI64C0.727-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI64C0.727-W1 is a medium frequency inverter from the PSI Frequency Inverters series, offering a mains voltage range of 400 to 480 VAC and a nominal current of 220 Amps. This water cooled unit has cabinet losses up to 210 Watts, supports a maximum sequence rate of 1000 Hz, and is rated for protection class IP20. It operates at a maximum site altitude of 2000 meters and features a minimum water flow requirement of 4 liters per minute.
Internal Product Review
The PSI64C0.727-W1 is a Bosch Rexroth Indramat medium frequency inverter with water-cooled operation. A 400 to 480 VAC mains voltage and 220 A nominal current support stable integration in demanding drive systems. IP20 protection and a 1000 Hz sequence rate make the unit a strong choice for controlled, high-response inverter applications.
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Product Description:
Bosch Rexroth Indramat supplies the PSI64C0.727-W1 inverter as part of its PSI Frequency Inverters series. This medium-frequency unit converts three-phase mains power so induction heating generators, high-speed grinders, or similar equipment can operate at controlled intermediate frequencies. Within an automation cell, it sits between the plant supply and the work coil, regulating current and protecting upstream breakers. Because the model includes integrated overvoltage hardware and programmable sequencing, it frequently replaces discrete thyristor banks in retrofit projects.
The power section accepts a three-phase input of 400 - 480 VAC, drawing a nominal 220 A during steady operation. For rapid energy transfer, the primary can surge to 1600 A without exceeding the semiconductor ratings. Internal dissipation is limited; basic cabinet losses are 69 W under idle magnetization and can climb to 210 W when switching at full load. If the application runs at maximum sequence rate, the heat sent to the liquid circuit can reach 700 W. The unit is water-cooled; a minimum coolant flow of 4 l/min is required, and that flow produces about 0.6 bar of pressure drop across the plates. Continuous service is permitted at site altitudes up to 2000 m.
The control platform uses the E/A_DISKR2ED I/O board, supervised by battery-buffered RAM that can hold up to 256 user programs. Cycle execution is paced by a sequence rate of 1000 Hz, and event timing is distributed over an EtherNet timer. Line disturbances are suppressed by the integrated MOV network while the housing carries a protection rating of IP20, permitting installation inside closed switch cabinets. Overcurrent, thermal, and coolant flow parameters are monitored continuously, and the software can select any of the stored programs without stopping the inverter.
