Littelfuse, Inc. MPU-32 Series - Motor Protection Unit MPU-32-04-00

The MPU-32-04-00 is a Motor Protection Unit designed for three-phase, low-voltage, medium-horsepower induction motors. It offers current and temperature-based protection, metering, and data-logging capabilities. This unit is suitable for retrofitting existing systems and can be programmed via a front-panel interface, TIA-232 port, or optional communication networks such as EtherNet/IP and Modbus TCP. Key features include three AC current inputs, an earth-leakage CT input, a programmable digital input, and an onboard temperature sensor input compatible with 100-Oc platinum RTDs or PTCs. The device also provides three programmable output relays and a 4-20 mA analog output. Communication options include standard RS-232 and optional TIA-485, DeviceNet, and Ethernet interfaces. The MPU-32-04-00 supports various protective functions, including overload, ground fault, phase loss, and unbalance detection, which help prevent motor damage and extend motor life. It is conformally coated for durability and has a 10-year warranty. The unit is compliant with CSA, CE, and UL standards, making it suitable for a range of industrial applications.