PSI64C0.120-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI64C0.120-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It handles an output current of 2400 Amps and supports mains voltages between 400 and 480 VAC. This inverter uses water cooling with a recommended water flow of 10 liters per minute and operates at an ambient temperature of 45 °C.
Internal Product Review
The PSI64C0.120-W1 is a medium frequency inverter with water-cooled operation that stands out for efficient thermal management in high-demand installations. A 400–480 VAC mains range and 2400 A output current support stable performance in heavy-duty inverter applications. A 10 l/min water flow at 30 °C inlet temperature helps maintain consistent thermal control.
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Product Description:
The PSI64C0.120-W1 is a power-conversion unit produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. Designed for installation in induction melting, brazing, and surface-treatment lines, it changes three-phase mains energy into a regulated medium-frequency output that drives resonant load coils. The inverter integrates into automation racks where accurate energy control and high current density are required to maintain uniform thermal processes and repeatable production cycles.
The inverter accepts a mains window of 400 – 480 VAC, allowing it to connect to common industrial supply grids without an autotransformer. Internally, a clock frequency of 1 kHz sets the switching sequence of the IGBT stack, so the output waveform maintains low harmonic distortion at the selected resonance point. Under sustained load, the power section can deliver an armature output current of 2400 A, while the shared DC bus is rated for a system current of 660 A that flows toward adjacent converters. Auxiliary electronics are fed from a 24 V DC control supply, which supports gating logic, fault monitoring, and the timer relay required for process interlocks.
Thermal management relies on a water-cooled heat sink that extracts up to 4400 W of switching and conduction loss from the semiconductor stack. The circuit requires a coolant flow rate of 10 l/min at an inlet temperature not exceeding 30 °C, and flow is connected by an M16 × 1.5 union that mates with standard hydraulic fittings. Under these conditions, cabinet loss is limited to 100 W, which helps keep the surrounding air below the rated ambient temperature of 45 °C. The electronic section remains finger-safe behind an IP20 shield, and surge transients on the mains are suppressed by a MOV clamp so the high secondary current remains confined to the load circuit rather than the control backplane.
