PSI63C0.156-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.156-W1 is a medium frequency inverter from the PSI Frequency Inverters series, designed for use with a control supply of 24 V DC and main voltages between 400 and 480 VAC. It features integrated temperature monitoring, a maximum output current of 800 Amps, and utilizes water cooling with a 4 l/min water flow. The unit offers IP20 protection and supports a maximum ambient temperature of 55 degrees Celsius.
Internal Product Review
The PSI63C0.156-W1 is a medium frequency inverter with water-cooled thermal management and a 400–480 VAC mains voltage range. Integrated temperature monitoring and MOV overvoltage protection support stable, well-managed operation in demanding power conversion service. A maximum output current of 800 A stands out as a major strength for high-load industrial applications.
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Product Description:
The PSI63C0.156-W1 medium frequency inverter is manufactured by Bosch Rexroth Indramat and belongs to the PSI Frequency Inverters series. This device converts incoming three-phase mains into a regulated medium-frequency output that drives induction coils, welding transformers, or similar loads in automated production cells. By supplying stable current at elevated frequencies, it enables precise thermal or forming processes that demand accurate energy control.
During operation, the inverter's control section modulates the IGBT bridge at 1 kHz, producing the medium-frequency waveform from a three-phase input range of 400 – 480 VAC. A separate 24 V DC control supply powers the logic and the 24 V timer circuit that coordinates start-up and interlocks. Separating the low-voltage control supply from the main power section helps the inverter maintain command logic and protective sequencing during switching events. Water-cooled heat sinks dissipate switching losses, and the design calls for a coolant flow of 4 l/min with an inlet temperature not exceeding 30 °C to keep semiconductor junctions within safe limits. For electrical safety, metal-oxide varistor overvoltage clamps protect the DC link from line surges, while integrated temperature monitoring triggers a shutdown if thresholds are crossed. The enclosure carries a protection level of IP20, and the drive can deliver up to 800 A of output current on short duty cycles. Power lugs accept conductors up to 50 mm², and auxiliary terminals accommodate a 35 mm² wire range.
On the load side, the inverter supplies a nominal system current of 110 A for continuous duty, while the modular PSG 3100 output circuit tolerates momentary secondary currents reaching 36 kA when energizing resistance-welding transformers. This current profile suits applications that require short, high-energy pulses followed by controlled recovery between cycles. Internal busbars and bolted links are sized for these peaks. The coolant circuit couples to the machine through an M16 × 1.5 external thread, simplifying hose installation. Stable performance is maintained in panels where air temperature stays below 55 °C, and dedicated sensors initiate an orderly shutdown if that ambient limit is exceeded.
