PSI63C0.181-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.181-W1 is a medium frequency inverter from the PSI Frequency Inverters series with a water cooled design and a rated weight of around 25 kilograms. It supports mains voltages of 400 to 480 VAC at 50 or 60 Hz and delivers a maximum output current of 800 Amps. The inverter features IP20 protection, 24 VDC integrated power supply output, and allows programming through its V24/RS232 interface.
Internal Product Review
The PSI63C0.181-W1 is a medium frequency inverter engineered for demanding industrial duty, with water-cooled operation and a nominal system current of 110 A. Support for 400 to 480 VAC mains input and a maximum output current of 800 A gives the unit strong process headroom and dependable power delivery. IP20 protection and a 1 ms time programming unit make the PSI63C0.181-W1 a precise, high-value choice for controlled production environments.
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Product Description:
The PSI63C0.181-W1 is a medium-frequency inverter produced by Bosch Rexroth Indramat for the PSI Frequency Inverters series. The unit serves as a dedicated power stage that converts three-phase mains power into controlled DC and medium-frequency AC. This conversion allows automated stations to operate inductive loads or multiple welding electrodes with repeatable energy delivery during production cycles.
The inverter accepts an input of 400–480 VAC at 50 or 60 Hz and permits a mains current of 110 A while supplying up to 800 A on the secondary circuit. Its switching devices operate at 1 kHz, providing the timing needed for precise current modulation. Semiconductor heat is removed through a water jacket that requires a continuous flow of 4 L/min and supports cooling losses of 420 W when the inlet temperature does not exceed 30 °C. The electronics are installed in an IP20 enclosure, and a metal-oxide varistor network provides overvoltage suppression on the DC link. An integrated 24 V DC supply delivers up to 2 A for external relays or sensors, while the RS-232 V24 port provides parameter access from a supervisory computer. Wire connections accept conductors up to 35 mm², and the main terminals accommodate conductors up to 50 mm² for connection to typical cabinet power circuits.
The internal timer has a resolution of 1 ms for sequence control, and application data such as current ramps or electrode counts can be stored in up to 256 individual programs. Climatic class 3K3 permits operation between 10 and 55 °C. A lithium AA 3.6 V battery preserves time-program data during power outages, and a separate 24 V timer rail keeps the programmer active while the main power stage is disabled. The assembly weighs approximately 25 kg, providing a manageable enclosure size for fixed installation within industrial equipment. Water connections use M16 × 1.5 threads, allowing the inverter to connect directly to compatible closed-loop cooling circuits. The threaded connections also provide secure attachment points for coolant lines routed through the machine frame.
