Product Description:

The PSI63C0.775-L2 belongs to the PSI Frequency Inverters series manufactured by Bosch Rexroth Indramat. This air-cooled, medium-frequency inverter converts three-phase mains power into a controlled output suitable for induction heating, welding, or other automation processes that require high secondary currents. When installed in a cabinet, it provides precise energy delivery that can be synchronized with motion controllers, and its Ethernet timer interface supports coordination with PLC sequences.

The inverter accepts a three-phase supply between 480 – 690 VAC and draws its auxiliary power from a separate 24 V DC control supply. Under continuous duty, it delivers a nominal system current of 110 A, while transient demands can be met with a maximum output current of 800 A. Internal gate drivers switch at a clock frequency of 1 kHz to shape the medium-frequency waveform. The enclosure has an IP 20 rating for protection against dust ingress, and metal-oxide varistors suppress overvoltage events on the DC link. All power stages use forced-air cooling, and intake air may reach 45 °C before derating begins.

The enclosure weighs 21 kg and connects to busbars or cables with terminals that accept 50 mm² lugs, while motor leads may be wired with 35 mm² conductors. Heat generated by the semiconductor bridge appears as a basic cabinet loss of 100 W, and during peak operation the cooling section must dissipate up to 360 W. A secondary current capability of 36 kA supports applications that use large coupling transformers. The inverter remains operational until ambient air around the heat sink reaches 55 °C, provided airflow is maintained by the specified fans. Ethernet timing also allows synchronous triggering with external equipment, and the three-phase design supports balanced loading of industrial power networks.