PSI6300.154-L1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI6300.154-L1 is a medium frequency inverter in the PSI Frequency Inverters series. It features a mains voltage range of 400 to 480 VAC, supports 50/60 Hz, and is air cooled. The inverter offers a logic supply range of 19 to 30 VDC, has a maximum primary current of 800 A, and weighs 20 kg.
Internal Product Review
The PSI6300.154-L1 is a medium frequency inverter designed for stable high-current operation on 400 to 480 VAC mains. Air-cooled construction and discrete 24 V I/O support dependable cabinet integration and straightforward machine interfacing. Excellent electrical headroom is the standout advantage, with max secondary current reaching 36 kA.
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Product Description:
The PSI6300.154-L1 inverter is produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. Classified as a medium-frequency inverter, it converts three-phase line power into a regulated medium-frequency output for induction heating systems and other high-current industrial loads. This operating role lets it supply controlled energy to transformers and resonant heating circuits where stable output is important for repeatable process behavior. The unit includes its own 24 V control electronics supply and uses discrete 24 V I/O, so it can link directly to PLC gating as a compact power-conversion stage for automated equipment cabinets.
On the line side, the inverter accepts 400–480 VAC at 50/60 Hz and draws a nominal current of 110 A during continuous operation. The unit is air-cooled, so heat is removed by forced convection through cabinet ducts, and its steady cabinet base loss is 69 W, which helps reduce the thermal load in densely packed panels. A minimum conductor size of 35 mm² is recommended, and the terminal screws can be tightened to 6 to 8 Nm for low-impedance busbar connections. The installed mass is 20 kg, which keeps the unit within a practical range for panel mounting and routine handling.
During startup or process surges, the primary circuit can withstand 800 A, while the transformer secondary may deliver up to 36 kA to the work coil. When current demand peaks, cabinet loss rises to 170 W, and that increase remains within the capacity of the same cooling path. Control electronics are powered by an internal 24 VDC supply that operates over a logic range of 19–30 VDC, and the same 24 V level also feeds the timer relay and discrete I/O interface. A metal-oxide varistor network provides overvoltage protection across the DC link so line transients do not propagate to the load.
