Littelfuse MPU-32-04-00, MPU-32 Series, Motor Protection Unit, 65-265VAC/80-275DC, TIA-232 & EtherNet/IP & Modbus TCP, Using MPU-CIM-00-00, purchased separately
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The MPU-32 series Motor Protection Unit is used to provide current and temperature-based protection, metering, and datalogging for three-phase, low-voltage, medium-horsepower induction motors. This relay is ideal for retrofitting and upgrading obsolete or aging motor protection using existing CTs. The MPU-32 can be programmed using the front-panel operator interface, the TIA-232 port, or an optional communications network. See the PMA Family of Panel Mount Adapter Kits to replace common obsolete relays.
Motor Protection Unit
• Three ac-current inputs
• Earth-leakage-CT input
• Programmable digital input
• 24 V dc source for digital input
• Programmable 4–20-mA analog output
• Onboard temperature-sensor input
• 100-Ω-Platinum RTD or PTC
• Three programmable output relays
• Local RS-232 communications, optional network communications
• PC-interface software (SE-Comm-RIS)
• 4 line x 20 character backlit LCD display
• Keypad for programming and display selection
• 4 LEDs; 1 user programmable
Specifications
| Protective Functions (IEEE Device Numbers) | Overload (49, 51), Phase reverse (current) (46), Overcurrent (50, 51), Jam, Ground fault (50G/N, 51G/N), PTC overtemperature (49), RTD temperature (38, 49), Unbalance (current) (46), Starts per hour (66), Differential (87), Phase loss (current) (46), Undercurrent (37) |
| Input Voltage | 65-265 V ac, 25 VA; 80-275 V dc, 25 W |
| Power-Up Time | 800 ms at 120 V ac |
| Ride-Through Time | 100 ms minimum |
| 24-Vdc Source | 100 mA maximum |
| AC Measurements | True RMS and DFT, Peak, 16 samples/cycle, and positive and negative sequence of fundamental |
| Frequency | 50, 60 Hz or ASD |
| Output Contacts | Three Form C programmables |
| Communications | TIA-232 (standard); TIA-485, DeviceNet™, Ethernet (optional) |
| Analog Output | 4-20 mA, programmable |
| Conformally Coated | Standard feature |
| Warranty | 10 years |
| Control Unit Mounting | Panel (standard), Surface (with MPU-32-SMK converter kit) |
| Current Input Module Mounting | DIN, Surface |
| Certification & Compliance | |
| CSA |
CSA, Canada and USA (CSA C22.2 No. 14, CSA C22.2 No. 213-M1987 (RTD module only), CSA E60079-15:02 (RTD module only)) |
| CE | EN 60255-26, IEC 61010-1 |
| UL | UL Recognized (UL 508, UL 1053, UL 60079-15 (RTD module only)) |
| RCM | RCM |