PSI63C0.357-L1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.357-L1 is a medium frequency inverter from the PSI Frequency Inverters series. It operates with a mains voltage of 400 to 480 VAC, an output current of 800 Amps, and supports a control supply of 24 V DC. The inverter uses air cooling, features IP20 protection, and has a cabinet loss of 69 Watts.
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Product Description:
The PSI63C0.357-L1 medium-frequency inverter belongs to the PSI Frequency Inverters series produced by Bosch Rexroth Indramat. As a stand-alone power stage, the unit converts three-phase mains energy into a regulated medium-frequency output for induction heating coils, hardening generators, or similar loads in automated lines. Integrated control electronics, backup memory, and field interfaces allow the inverter to communicate with motion controllers and supervisory PLCs for accurately timed current and voltage profiles.
Operating from a three-phase supply of 400 – 480 VAC, the inverter produces a nominal armature output of 800 A, while the overall system current draw is 110 A. The internal power section switches at a 1 kHz clock frequency, which supports stable medium-frequency waveforms without excessive harmonic distortion. Logic circuits and auxiliary relays are fed by a separate 24 V DC control supply so diagnostics can remain active when the main power is isolated. An MOV network provides coordinated overvoltage protection for the DC link, and the metal enclosure has an IP 20 rating that helps prevent accidental finger contact with live conductors. Secondary current can reach 36 kA when the PSG 3100 transformer is used, and the inverter can be installed up to 2000 m above sea level without derating when the ambient conditions remain within the permitted range.
Thermal management uses an air-cooled heat sink that dissipates 69 W of cabinet loss at full load, helping keep internal components below the 55 °C ambient limit. Application parameters are retained in a nonvolatile AA 3.6 V lithium battery and can be organized into as many as 256 stored programs, each selectable through the INTERBUS timer. A chassis-mounted 9-pin D-Sub port provides serial access for program download and diagnostics. Power terminals accept lugs up to 50 mm², while control wiring is accommodated in cages sized for 35 mm² conductors so the screw clamps maintain consistent contact under vibration.
