Product Description:

The PSI6300.757-L2 belongs to the PSI Frequency Inverters series manufactured by Bosch Rexroth Indramat. It is a medium-frequency inverter that converts a three-phase supply into regulated high-frequency power for induction heating, welding, or other controlled energy applications in automated lines. In typical installations, it serves as the bridge between a 480–690 VAC mains source and a resonant load, while its integrated control section manages current, timing, and safety interlocks required by industrial motion or thermal processes.

The inverter executes its current and voltage loops at a 1000 Hz control cycle, giving the drive the fast response required for tight power regulation. A wide input range of 480 – 690 VAC permits direct connection to high-voltage utility feeds without external transformers. Under continuous duty, it supplies 110 A of rated current, while the power section can deliver surges up to 800 A of primary current and, when paired with a PSG 3100 transformer, up to 36 kA of secondary current to the work coil. Heat is removed by an air-cooled tunnel, so no liquid circuit is necessary. Regulation tasks run on a standard CPU, field devices connect through an Ethernet I/O interface and an E/A_DISKR2ED module, and time-critical functions are triggered by an EtherNet timer. These electronics operate properly when 100 mm of installation clearance is maintained around the housing.

Thermal losses are predictable: cabinet dissipation is 100 W at idle and rises to 200 W at maximum current. Power wiring must use conductors no smaller than 35 mm², and the spring-clamp terminals accept up to 50 mm² copper lugs. A dry contact rated at 24 VDC, 3 A provides a stop signal for external safety relays, while the analog 4–20 mA channel supplies default pressure or power setpoints to downstream actuators. These values support proper sizing of ventilation, cabling, and protective devices without exceeding the inverter’s operating envelope.