PSI64C0.776-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI64C0.776-W1 is a medium frequency inverter from the PSI Frequency Inverters series, with a standard frequency of 1000 Hz and supports a mains voltage range of 400 to 480 VAC. It is water cooled, has a weight of 40 kilograms, and offers a maximum secondary current of 54 kA. This inverter features an EtherNet/IP fieldbus interface and requires a minimum water flow of 4 liters per minute.
Internal Product Review
The PSI64C0.776-W1 is a medium frequency inverter that stands out for 1000 Hz standard frequency and EtherNet/IP fieldbus support. Water-cooled construction and 4 l/min minimum water flow support consistent thermal management in demanding installations. A 220 A mains nominal current gives this Bosch Rexroth Indramat inverter strong application value for medium-frequency power conversion.
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Product Description:
The PSI64C0.776-W1 is a medium-frequency inverter produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. Designed for induction heating, welding, and similar high-frequency power supplies, it converts three-phase mains power to a controlled medium-frequency output that can synchronize with automation controllers across standard industrial Ethernet networks. Its cabinet-mounted design provides a compact solution for equipment that must manage high current loads and precise power modulation in industrial production lines. The output is intended for processes that depend on stable frequency and repeatable power delivery during continuous production.
At the input, the inverter accepts a supply of 400 – 480 VAC and is rated for a mains nominal current of 220 A, so incoming conductors must match the 95 mm² connection cross-section. Internally, its power stage modulates the link voltage to a fixed standard frequency of 1000 Hz for consistent heating profiles. Cabinet losses reach 210 W at maximum output, while the water circuit must be capable of removing up to 700 W of cooling losses. The water-cooled heat sink avoids recirculating cabinet air and supports use in sealed enclosures. Control integration is handled through an EtherNet/IP fieldbus, and local discrete signals are routed through the E/A DISK R2ED I/O module, which uses the same EtherNet timer type for synchronized triggering.
A primary surge of 1600 A feeds the converter bridge, and the downstream transformer’s secondary can deliver up to 54 kA, so busbars and fuses must tolerate significant fault energy. Reliable liquid cooling starts at a minimum flow of 4 l/min and produces a water pressure drop of 0.6 bar, so flow sensors should interlock the drive to prevent thermal runaway. Basic standby dissipation is limited to 69 W, which helps reduce ambient heating when the inverter is enabled but idle. The housing measures 653 mm high, 288 mm wide, and 280 mm deep, and it weighs 40 kg, so the unit fits shallow control cabinets without excessive panel depth.
