Product Description:

The PSI63C0.762-W2 medium-frequency inverter is produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. The unit conditions three-phase utility power and delivers controlled medium-frequency energy to heating coils, plating baths, or other industrial loads that require precise current regulation. In automation cells, it sits between the mains transformer and the workpiece, converting voltage and managing current so process equipment can run at stable electrical parameters.

This inverter accepts a three-phase input from 480–690 VAC along with a 24 V DC control supply for logic and relay circuits. Its internal modulator runs at 1 kHz, setting the switching rhythm that shapes the output waveform. Under full conduction, the power section can deliver 800 A, while routine duty uses a nominal system current of 110 A. Metal-oxide varistors provide overvoltage protection, and status timing is coordinated over an EtherNet timer channel. Cabinet dissipation is 100 W at basic load and rises to 140 W when the drive operates at maximum power. Connection points accept conductors up to 50 mm², and field wiring can be as small as 35 mm². The electronics are housed in an IP20 enclosure that is intended for installation inside a protected cabinet.

Thermal management uses a water-cooled plate that moves 4 L/min of coolant through M16 × 1.5 fittings. The circuit must enter the unit below 30 °C, and the ambient air around the cabinet may reach 55 °C without derating. Heat generated by high-frequency switching leaves the cabinet through the exchanger, limiting cooling losses to 500 W even during transient overloads that push the secondary current of the associated PSG 3100 transformer to 36 kA. This cooling method controls junction temperature during high-current operation and reduces heat buildup inside the enclosure.