PSI63C0.751-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.751-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It uses a TriCore CPU, features water cooling, and supports Ethernet I/O connections. The device delivers an integrated power output of 2 Amps at 24 VDC, with a degree of protection rated at IP20.
Internal Product Review
The PSI63C0.751-W1 is a Bosch Rexroth Indramat medium frequency inverter built for 400 - 480 VAC systems with water-cooled thermal management. TriCore CPU architecture and Ethernet I/O support fast control response and straightforward network integration. IP20 protection and 110 A nominal mains current make the inverter a strong choice for demanding cabinet-based power applications.
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Product Description:
The PSI63C0.751-W1 medium-frequency inverter is built by Bosch Rexroth Indramat and belongs to the PSI Frequency Inverters series. Designed for induction heating and other demanding automation tasks, the unit converts three-phase utility power into a programmable medium-frequency output that drives resonant transformer systems or work coils. By integrating power conversion, process control, and network interfacing in a single chassis, the inverter serves as the central energy source for equipment that requires precisely timed, high-current waveforms. Its architecture is intended for installations where compact power electronics must be placed inside machinery cabinets and connected directly to higher-level PLCs.
The incoming supply of 400–480 VAC is routed through a power stage with a nominal current draw of 110 A, and the internal TriCore CPU supervises waveform generation, protective interlocks, and timing. The electronic controls are enclosed in a housing with an IP20 degree of protection, so installation inside a sealed cabinet is required. For auxiliary devices, the inverter supplies 24 VDC at 2 A through its integrated power output, eliminating the need for a separate control transformer. Heat is extracted by a water-cooled cold plate. Cabinet losses reach 69 W at idle and 110 W under full load.
The power section can deliver up to 800 A of primary current, while the matching PSG 3100 transformer path can withstand peaks of 36 kA on the secondary, making it suitable for demanding heating cycles. Copper conductors with a minimum cross-sectional area of 35 mm² are required to carry these currents safely. During continuous operation, dynamic switching and reactive components raise total cooling losses to 420 W. Maintaining a water flow of 4 L/min keeps the pressure drop at 0.1 bar and prevents thermal derating. Control integration is handled through the built-in Ethernet I/O and an Ethernet-based timer module. The memory stores 256 selectable programs, allowing changeovers to be performed without external reconfiguration.
