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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.

Climatic category
3K3 according to EN 60721-3-3
Cooling Method
Water Cooled
Degree of protection
IP 20
Integrated power supply unit Output current
max. 2 A
Integrated power supply unit Output voltage
24 VDC
Mains frequency
50 or 60 Hz
Mains Voltage
400 - 480 VAC
Max. cooling losses
420 W
Product Type
Medium Frequency Inverter
Temperature range Operation
+10 -+55 ºC
Temperature range Storage / transport
-25 - +70 ºC
Timer Type
EtherNet
Weight
approx. 25 kg

Frequently Asked Questions about PSI64C0.779-W1:

Q: What is the required mains voltage for the PSI64C0.779-W1 frequency inverter?

A: The PSI64C0.779-W1 operates on a mains voltage range of 400 to 480 VAC.

Q: What cooling method does the PSI64C0.779-W1 frequency inverter use?

A: This model features water cooling for heat dissipation during operation.

Q: What is the degree of protection for the PSI64C0.779-W1 inverter?

A: The PSI64C0.779-W1 has an IP 20 degree of protection, meaning it is protected against solid objects but not against water ingress.

Q: What is the output capacity of the integrated power supply unit on the PSI64C0.779-W1?

A: The integrated power supply unit provides a maximum output current of 2 A at 24 VDC.

Q: What is the allowable operating temperature range for the PSI64C0.779-W1 frequency inverter?

A: This inverter supports operation in ambient temperatures ranging from +10°C to +55°C.


Internal Product Review

  • ‘‘The PSI64C0.779-W1 is a medium frequency inverter with water-cooled thermal management. A 400-480 VAC mains range and 50/60 Hz input support straightforward integration across standard industrial power systems. IP20 protection adds dependable cabinet suitability for a well-executed inverter package.’’

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