Product Description:

The PSI6300.330-L2 is a medium-frequency inverter manufactured by Bosch Rexroth Indramat for the PSI Frequency Inverters series. It converts incoming three-phase utility power into a controlled medium-frequency output that can be matched to induction heaters, welding transformers, or other high-current industrial loads. Within an automation cell, it bridges the gap between PLC timing signals and the load, providing programmable current profiles that support precise thermal or metallurgical processes while protecting the mains from direct load disturbances.

The power section accepts line voltages from 480 to 690 VAC and uses a nominal system current of 110 A to deliver continuous energy to the inverter bridge. When rapid energy bursts are required, the output stage can supply up to 800 A, with the current adjusted in 10 A increments. Control electronics receive power through an isolated 24 V DC input, keeping the gate drives and logic active even when the main contactor is open. Protection against accidental contact is provided by the IP20 enclosure, so the unit must be installed inside a suitable panel. MOV-based overvoltage suppression protects the power section against voltage spikes. A 9-pin D-Sub programming connector, INTERBUS timer functions, and a program capacity of 256 steps support configuration and sequenced operation.

The inverter can operate at ambient temperatures up to 55 °C and at altitudes up to 2000 m without current derating. An internal air-cooled system removes the specified cabinet heat loss of 100 W, eliminating the need for liquid cooling circuits in most cabinets. A peak secondary current of 36 kA allows the downstream transformer to reach target welding or heating profiles, while the 1 kHz clock frequency supports precise timing. A 3.6 V backup battery preserves timing information during brief power interruptions. The internal cooling path requires adequate panel airflow so that heat can leave the enclosure during continuous operation.