PSI63C0.325-L1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.325-L1 is a medium frequency inverter from the PSI Frequency Inverters series. It operates with a mains voltage of 400 to 480 VAC and features a maximum output current of 800 Amps and continuous thermal current of 110 Amps. The inverter uses air cooling, is rated for ambient temperatures up to 55 °C, and has IP20 ingress protection.
Internal Product Review
The PSI63C0.325-L1 is a medium frequency inverter with 400 - 480 VAC mains capability and air-cooled thermal management suited to demanding industrial service. IP20 protection and 110 A continuous thermal current support stable cabinet integration and consistent operation. The 800 A maximum output current is a standout strength for high-demand medium-frequency systems.
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Product Description:
The PSI63C0.325-L1 frequency inverter is manufactured by Bosch Rexroth Indramat and belongs to the PSI Frequency Inverters series. Classified as a medium frequency inverter, it is intended for cabinet-mounted power conversion where adjustable output current must be delivered to induction heaters, weld transformers, or other high-current loads in automated lines. It converts incoming line power into controlled output for processes that require stable current delivery during repeated industrial cycles.
The unit operates from a mains window of 400 – 480 VAC and modulates its output with a switching frequency of 1 kHz. When driven to maximum load, it can supply up to 800 A, while cabinet dissipation rises from 69 W at idle to 170 W at rated power, and a separate cooling loss of 360 W must be removed by the built-in air-cooled heat sink. That heat sink is limited to 45 °C, so the surrounding ambient temperature must not exceed 55 °C. The IP20 enclosure provides finger-safe protection, but the cabinet must supply the required external sealing. All control electronics are powered from a 24 V DC auxiliary circuit, and INTERBUS wiring supports timer-based sequencing without additional relays.
Long-duration thermal loading is limited by a continuous current capability of 110 A, yet the design can withstand secondary currents up to 36 kA during short pulses used in spot-weld applications. Installation is approved up to 2000 m above sea level, and operation above this altitude requires derating. Logic boards are protected against lightning-induced surges by a metal-oxide varistor, and the input and output studs accept conductors up to 50 mm². In the control loop, field wiring for the 24 V DC circuit is limited to 35 mm². MOV surge arrestors and air cooling support reliable operation within the stated electrical and thermal limits.
