Product Description:

The PSI63C0.765-L2 is a medium-frequency inverter produced by Bosch Rexroth Indramat for the PSI Frequency Inverters series. It converts high-power AC from industrial mains into regulated medium-frequency energy so that induction heaters, welding generators, or other process loads in automated lines receive the current required for consistent thermal profiles. As part of a closed-loop system, the inverter interfaces with plant controllers and supports precise energy management in continuous production cells.

The inverter accepts a three-phase input of 480 – 690 VAC, which suits heavy industrial grids, and it relies on a separate 24 V DC control supply to keep its internal logic and safety circuits active. During normal duty, the power section carries 110 A, but the design allows momentary surges up to 800 A to cover rapid heat-up cycles or fault clearing. When paired with a PSG 3100 resonance transformer, the secondary loop can supply 36 kA, enabling high-current work coils without external boosters. Network communication is handled through an Ethernet I/O port, and the same connection supports the integrated timer function for synchronized start-stop sequencing. The hardware is rated IP20, which limits installation to clean, shielded cabinets.

Operating limits are set to maintain safe performance. Cabinet power dissipation is 100 W, and heat is removed by an air-cooled channel that keeps internal components within their allowable temperature range. The inverter modulates its output at a fundamental clock of 1 kHz, balancing switching loss against control resolution. Continuous service is allowed up to 55 °C ambient, provided the intake air does not exceed the 45 °C cooling threshold. Installations up to 2000 m elevation are permissible without derating. Surge energy on the DC link is clamped by an MOV stage, and 50 mm² terminals accept the large conductors needed for the current ratings.