PSI63C0.357-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.357-W1 is a water-cooled medium frequency inverter from the PSI Frequency Inverters series. It has a mains voltage range of 400 to 480 VAC, a nominal mains current of 110 Amps, and offers a degree of protection rated IP20. The inverter is built with a TriCore CPU and supports a maximum primary current of 800 Amps, with max secondary current up to 36 kA.
Internal Product Review
The PSI63C0.357-W1 is a Bosch Rexroth Indramat medium frequency inverter that delivers solid power conversion with a 400 to 480 VAC mains voltage and 110 A nominal current. Water-cooled construction and IP20 protection support dependable cabinet integration in controlled industrial installations. A 36 kA maximum secondary current stands out as a major performance advantage for demanding medium-frequency applications.
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Product Description:
The PSI63C0.357-W1 medium-frequency inverter is built by Bosch Rexroth Indramat for the PSI Frequency Inverters series. Within an automated cell, it converts the three-phase mains supply into a controlled medium-frequency output that drives induction heating coils, weld transformers, or other power-intensive processes that demand fast energy modulation. Its compact frame allows placement inside a machine cabinet where the unit works with external controllers to maintain consistent thermal profiles, improve cycle time, and reduce energy waste during each production sequence.
The inverter accepts a three-phase supply between 400–480 VAC and draws a mains nominal current of 110 A, so upstream breakers and cabling must accommodate that steady load. A water-cooled exchanger removes semiconductor heat, limiting internal temperature rise and holding cooling losses to 360 W when the drive operates at peak thermal load. The electronics are housed in an enclosure rated IP20, meaning fingers and solid objects greater than 12.5 mm are blocked while cabinet installation provides the required protection. These values describe the electrical input, the cooling method, and the enclosure level used during normal operation.
On the output side, the converter can energize a transformer with up to 800 A of primary current, delivering as much as 36 kA on the secondary windings during short pulses required by resistance-welding heads. Busbars must be sized no smaller than 35 mm² to avoid excess heating under those currents. Control instructions are processed by a TriCore CPU while field signals are coordinated over the INTERBUS timer channel, allowing deterministic gating of the power stage. At maximum utilization, cabinet losses are 110 W, switch cabinet base losses are 69 W, and the cooling circuit has a pressure drop of 0.1 bar at 4 l/min.
