PSI63C0.228-L1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.228-L1 is a medium frequency inverter from the PSI Frequency Inverters series. It operates on 400 to 480 VAC mains voltage and features a control supply voltage of 24 V DC. The device supports a maximum output current of 800 Amps, has IP20 protection, and uses air cooling with a maximum ambient temperature of 55 °C.
Internal Product Review
The PSI63C0.228-L1 is a Bosch Rexroth Indramat medium frequency inverter designed for dependable high-current industrial power conversion. Air-cooled construction and IP20 protection support clean cabinet integration and stable thermal management in controlled environments. A 400 to 480 VAC mains range with 800 A max output current makes the unit a strong choice for demanding inverter applications.
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Product Description:
The PSI63C0.228-L1 medium-frequency inverter is built by Bosch Rexroth Indramat for the PSI Frequency Inverters series. The unit converts a three-phase utility feed into controlled medium-frequency power that drives induction heaters, quench stations, and other automation loads requiring precisely timed energy release. PROFIBUS timing support lets the inverter synchronize with machine PLCs for coordinated process control.
The inverter accepts a three-phase supply between 400-480 VAC. Its nominal system current is 110 A, while the power stage can deliver up to 800 A for short-duty heating pulses, and a secondary path tolerates 36 kA so transformers are not current-limited. Switching devices operate at 1 kHz, providing a stable carrier for medium-frequency output. The logic section is powered from 24 V DC, isolating control electronics from the high-energy bus. The enclosure is rated IP20, so fingers and tools are guarded, but the drive must be installed inside a clean cabinet. Air cooling removes heat from the unit, and MOV overvoltage protection clamps transients that ride on the mains during load tap changes. Recessed mounting lets the heat sink sit flush with the cabinet wall, conserving panel depth. Wire connections accommodate 35 mm² conductors, and the PROFIBUS timer integrates the inverter with central motion sequences.
Effective thermal management is required because cabinet dissipation can reach 170 W. A clearance of at least 100 mm around the cooling slots allows unobstructed airflow, keeping device temperatures within the intended operating range. The air path supports reliable operation of power electronics up to 45 °C, while the overall inverter may be exposed to an ambient ceiling of 55 °C without derating. Output terminals accept conductors up to 50 mm², and the clamping hardware is sized to minimize joint heating during sustained operation.
