PSI64C0.779-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI64C0.779-W1 is a medium frequency inverter from the PSI Frequency Inverters series and weighs approximately 25 kilograms. It features a water-cooled design, IP20 protection, and supports mains voltages from 400 to 480 VAC at 50 or 60 Hz. The integrated power supply unit provides a maximum output voltage of 24 VDC and up to 2 Amps.
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Product Description:
Bosch Rexroth Indramat builds the PSI64C0.779-W1 for the PSI Frequency Inverters series. The unit is a medium-frequency inverter that converts a fixed three-phase mains supply into an adjustable medium-frequency output for applications such as induction heating, resonant power supplies, and high-speed spindle drives in automated production lines. Its integrated control and power sections allow installation in electrical cabinets and direct connection to supervisory PLCs. This arrangement reduces the need for separate power-conversion and control modules while supporting centralized operation through the automation system.
Thermal regulation relies on a water-cooled heat sink that removes process losses without requiring substantial cabinet airflow. Ingress protection is rated IP20, so the enclosure prevents finger contact with hazardous internal components and blocks solid objects larger than 12 mm, while the surrounding cabinet provides additional protection. A dedicated auxiliary supply provides 2 A at 24 VDC, allowing contactors, sensors, and the internal controller to share one low-voltage rail. The power section accepts a three-phase mains supply of 400–480 VAC, matching common industrial distribution levels and eliminating the need for a step-up transformer. Water cooling transfers heat to an external circuit instead of releasing most of it into the electrical cabinet, which helps control internal cabinet temperature during sustained operation.
The inverter synchronizes with utility grids operating at either 50 or 60 Hz, allowing use with the two common industrial line frequencies. During full excitation, the cooling circuit must dissipate up to 420 W of losses, which must be considered when selecting the external chiller flow rate and heat-exchanger capacity. Continuous operation is permitted across an ambient temperature range of +10 to +55 °C, and storage is possible at temperatures as low as -25 °C. These operating conditions correspond to climatic category 3K3 under EN 60721-3-3. The enclosure weighs 25 kg, allowing its mounting structure and handling equipment to be selected accordingly. An Ethernet-based timer interface supports integration with modern drive controllers without requiring an additional fieldbus card.
