PSI63C0.178-W1 Bosch Rexroth Indramat
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MPN: R911173157
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The Bosch Rexroth Indramat PSI63C0.178-W1 is a medium frequency inverter from the PSI Frequency Inverters series equipped with a TriCore CPU and water-cooled design. It features a mains voltage range of 400 to 480 VAC, a nominal current of 110 Amps, and IP20 protection. The inverter supports a maximum primary current of 800 Amps and a maximum secondary current of 36 kA, with a minimum water flow of 4 liters per minute.
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Product Description:
The PSI63C0.178-W1 is a medium-frequency inverter developed by Bosch Rexroth Indramat for the PSI Frequency Inverters series. Installed between a three-phase power supply and an induction or transformer-based heating load, the unit converts mains power into an adjustable switching pattern suited to melting, brazing, or hardening systems used in industrial automation. By modulating current at medium frequency, it allows the thermal profile to be matched to material requirements. The water-cooled assembly houses the power electronics and control functions inside a compact cabinet suitable for protected industrial installations.
The basic cabinet power loss is limited to 69 W, while an internal plate heat exchanger removes up to 360 W of thermal loss through a closed water circuit. Input connections accept a three-phase supply of 400–480 VAC, and typical current draw under nominal operating conditions is 110 A. Protection against accidental contact is rated at IP20, so the unit must be mounted inside an appropriate enclosure that prevents exposure to moisture and small foreign objects. A TriCore microcontroller supervises the 1 kHz carrier and shapes the output into 1 kHz PWM pulses. Discrete 24 V input and output channels support direct sequencing with a PLC, while a matching 24 V timer provides timing control for the connected process.
The primary busbars can momentarily supply up to 800 A, and the secondary of the associated PSG 3100 transformer is rated for 36 kA when the application requires peak power. Reliable heat removal requires a minimum coolant flow of 4 L/min, at which point the pressure drop across the heat exchanger is 0.1 bar. The water supply temperature must not exceed 30 °C, and coolant pressure is limited to 10 bar. The mains feed requires conductors with a minimum cross-sectional area of 35 mm² to keep current density within safe limits during continuous operation. Proper coolant circulation must be established before sustained loading so that heat from the switching components can be transferred through the internal exchanger.
