Product Description:

The PSI63C0.177-L2 belongs to the PSI Frequency Inverters series from Bosch Rexroth Indramat. Classified as a medium-frequency inverter, it converts plant-level mains power to controlled, higher-frequency output that is suited for energy-intensive automation tasks such as resistance heating or welding control. By providing programmable current and timing functions, the unit serves as a central power stage that links high-voltage utility feeds with precision-regulated loads on the factory floor.

The inverter accepts a three-phase supply of 480 - 690 VAC and draws up to 110 A under nominal conditions. Internally air-cooled heat sinks dissipate a maximum of 420 W introduced by switching and conduction losses. Its main H-bridge generates a fundamental operating frequency of 1 kHz, and the power section can deliver a peak primary current of 800 A to matched transformers. Control logic is handled by a TriCore CPU with a program capacity of 256 steps, while twelve discrete 24 V inputs and timer functions coordinate process sequencing. The design supports as many as 32 electrodes, enabling synchronized control of multiple heating or welding stations without additional inverters.

Mechanical and installation features emphasize straightforward cabinet integration. The enclosure carries a IP20 rating, so it must be mounted inside a protected panel with forced airflow already provided for the rest of the drive train. Bus bars or cables must meet a minimum cross-section of 35 mm² to handle sustained currents, and downstream circuits can experience secondary peaks reaching 36 kA during fast-rise pulses. An internal power supply furnishes 24 VDC at 2 A for contactors or field I/O, eliminating the need for a separate auxiliary supply. The unit weighs 21 kg, a consideration for rail or shelf sizing when grouping multiple inverters in a high-power automation cell.