Product Description:

The PSI6300.326-L1 medium frequency inverter belongs to the PSI Frequency Inverters series produced by Bosch Rexroth Indramat. It supplies adjustable square-wave power for induction heating, hardening, or soldering equipment, allowing precise control of thermal energy delivered to metal workpieces. By modulating both frequency and current, the device lets the surrounding process be tuned for coupling efficiency while reducing stress on upstream transformers. Its cabinet form factor and air-path cooling enable direct placement in standard electrical enclosures alongside drives and PLC hardware. This arrangement supports automated thermal processes that require repeatable heat input and coordinated control with other cabinet-mounted equipment.

The inverter accepts a three-phase input of 400 – 480 VAC and draws a nominal line current of 110 A. For short heating surges, the primary circuit can rise to 800 A, while the internal transformer can deliver up to 36 kA on the secondary side. Output pulses are generated at a sequence frequency of 1000 Hz, balancing penetration depth and device dissipation. Control is handled by the PS5 IBS Fern I/O board and an INTERBUS timer module, which provide eight parallel inputs and eight parallel outputs for recipe selection or fault signaling. This control arrangement allows the heating cycle to exchange status signals with external automation without interrupting the power stage. The stop circuit interrupts 24 VDC at 3 A to remove drive-enable lines without disconnecting the mains.

The unit is cooled by an air channel that directs flow across heat sinks; this method keeps cabinet loss to 69 W at idle and raises it to 170 W at maximum current. An installation clearance of 100 mm above and below the housing is required so the fan can maintain design airflow. Power terminals accept cable lugs up to 50 mm², while the minimum connection cross-section is 35 mm² to limit conductor heating. A 3 mm neoprene seal gasket helps limit dust entry when the door is shut. With a mass of 20 kg, the inverter can be mounted on standard panel brackets inside the cabinet. These mounting and airflow requirements help maintain stable operation during extended heating duty.