Product Description:

The PSI6300.640-L1 is a medium-frequency inverter produced by Bosch Rexroth Indramat for the PSI Frequency Inverters series. It converts three-phase mains energy into a regulated medium-frequency output so that induction heaters, melting furnaces, or surface-hardening stations can modulate power without mechanical tap changers. A programmable control structure matches coil impedance and material load during industrial automation tasks, giving machine builders a compact electronic source for controlled current.

The power section accepts a line supply of 400–480 VAC, and the logic stage is fed from a separate 24 VDC control rail that keeps monitoring circuits active during power dips. An internal clock frequency of 1 kHz governs the transistor switching pattern, balancing spectral content against transformer losses. Continuous output is rated at 800 A, while the nominal system current is 110 A; these parameters support appropriate conductor sizing and cooling airflow. Air-cooled heat sinks dissipate up to 170 W of cabinet heat, while forced ventilation removes an additional 360 W. Connection hardware accommodates 50 mm² lugs at the terminals and a field cable wire size of 35 mm². The controller can store up to 256 individual programs, and a DeviceNet timer channel triggers profile changes without requiring an external PLC.

The cooling-air intake temperature must remain below 45 °C. Internal components can operate at temperatures up to 55 °C when the cabinet provides at least 100 mm of clearance for airflow. The enclosure has an ingress protection rating of IP20, so it must be mounted inside a panel that protects it from dust and accidental contact. Installation sites may be located up to 2000 m above sea level before derating is required. The secondary winding of the matching transformer can tolerate momentary peaks of 36 kA during arc-start or short-circuit events.