PSI65C0.762-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI65C0.762-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It features water cooling with a minimum water flow of 10 liters per minute, an IP20 protection rating, and operates on a mains voltage of 400–480 VAC. This inverter supports up to 32 electrodes and provides a fieldbus interface via Ethernet/IP.
Internal Product Review
The PSI65C0.762-W1 is a medium frequency inverter designed for dependable operation on 400 to 480 VAC mains. Water-cooled construction with a 10 l/min minimum water flow supports stable thermal management in demanding duty cycles. Ethernet/IP connectivity and a 1000 Hz sequence frequency make this inverter a strong choice for precise, responsive industrial control.
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Product Description:
The PSI65C0.762-W1 is a medium-frequency inverter manufactured by Bosch Rexroth Indramat within the PSI Frequency Inverters series. It conditions three-phase utility power so that automated welding heads, induction heaters, or furnace transformers receive a controllable medium-frequency source that matches process requirements. By integrating power conversion, cooling, and low-voltage auxiliaries in one frame, the product streamlines cabinet layouts in industrial automation cells.
Thermal management is based on a water-cooled design that extracts up to 4400 W of internal heat. To maintain that rating, the cooling circuit must deliver at least 10 L/min while overcoming a pressure drop of 0.65 bar. The electronics carry an IP20 degree of protection, which allows finger-safe access but still requires installation in a closed panel. Power enters at 400–480 VAC, and metal-oxide varistors provide MOV overvoltage suppression for line transients. A 24 VDC auxiliary rail, supported by an integrated 2 A supply, feeds contactors and sensors, and outgoing motor leads accept cable with a 120 mm² cross-section. Installation therefore requires both a closed electrical panel and an external cooling-water connection.
Control and sequencing are handled through an EtherNet/IP fieldbus that transfers setpoints and diagnostic words to the plant PLC. Local logic stores up to 256 user programs in battery-buffered RAM, allowing pattern changes to be saved locally for repeat operation. The inverter can issue current pulses at a 1000 Hz sequence frequency, using a timing block for synchronized electrode motion. During each burst, it can source 2400 A on the primary side of the output transformer, producing secondary currents as high as 120 kA for high-capacity spot welding applications. This pulsed output is intended for short, repeatable energy delivery in resistance welding processes.
