Product Description:

The PSI64C0.620-W1 is manufactured by Bosch Rexroth Indramat for the PSI Frequency Inverters series. Classified as a medium-frequency inverter, it converts factory three-phase power into the controlled medium-frequency output used for induction heating and similar automated processes. This allows the unit to supply process equipment that cannot operate directly from fixed line frequency alone. A closed water jacket removes internal heat so the inverter can operate inside a machine cabinet without adding excessive ambient temperature.

During operation, the inverter accepts a three-phase supply of 400–480 VAC and draws up to 220 A of mains current under nominal conditions. For short-term transients, its primary circuit can tolerate 1600 A, allowing fast energy delivery to the load during demanding process changes. The internal cooler must dissipate as much as 700 W of thermal energy produced by the power electronics, while cabinet losses rise as output current increases. Continuous water cooling is required, with a minimum flow of 4 l/min needed to keep semiconductor temperatures within limits and maintain stable operation. Control and diagnostics are handled by a TriCore CPU, and parameter exchange with a PLC is provided through a DeviceNet I/O interface that also carries timing functions on the same network.

The mechanical package measures 280 mm deep, 288 mm wide, and 653 mm high, fitting standard cabinet frames while leaving space for manifolds and bus bars. Its total weight is 40 kg, which gives the assembly enough mass to remain stable after mounting. With the stated minimum flow, the cooling circuit experiences a pressure drop of 0.6 bar, which must be considered when selecting pumps or chillers for the water loop. The vertical format also helps organize cable entry and coolant routing in limited cabinet space. Cabinet entry lugs accept a cable cross-section of 95 mm² so the mains connection can carry the required current without exceeding thermal limits.