Protection Relays & Controls Motor Protection–Advanced MPU-32 SERIES (PGR-6200) Motor Protection Unit Description The MPU-32 Motor Protection Unit is used to provide currentand temperature-based protection, metering, and data logging 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. See the PMA Family of Panel Mount Adapter Kits to replace common obsolete relays. 1 Motor Protection Unit 1 g g g g g g g g g g 2 g g Simplified Circuit Diagram A PHASE CT GF CT g B PHASE CT 2 Current Input Module (MPU-CIM) M PHASE CT RTD x 8 MPU-CIM (Current Input Module) MPU-32 (Motor Protection Relay) L1 MPS-RTD (Temperature Input Module) 2 Three ac-current inputs Earth-leakage-CT input Programmable digital input 24-Vdc source for digital input Programmable 4-20-mA analog output On-board 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 C The MPU-CIM Current Input Module is the interface between the MPU-32 relay and the 5-A-secondary, 1-A-secondary, and sensitive current transformers. The MPU-CIM is ordered separately from the MPU-32 and can be surface- or DIN-rail mounted. Wire-clamping terminals are standard but the MPUCTI is available for those who require ring-tongue terminals. Accessories 1 A L2 Ordering Information ORDERING NUMBER COMMUNICATION MPU-32-00-00 TIA-232 MPU-32-01-00 TIA-232 & TIA-485 MPU-32-02-00 TIA-232 & DeviceNet™ MPU-32-04-00 TIA-232 & EtherNet/IP™ & Modbus TCP PHASE CT PHASE CT GF CT ACCESSORIES REQUIREMENT Phase CTs Required MPS-CTU MPS-RTD-01-00 L1 (Control Unit) L2 MPS-DIF-01-00 Optional Optional MPU-32-SMK Optional CA-945 Optional MPS-OPI (Operator Interface) MPU-16A-Y92A-96N © 2014 Littelfuse Protection Relays & Controls Littelfuse.com/mpu-32 B Ground-Fault Current Transformer Optional zero-sequence current transformer detects ground-fault current. Available with 5-A and 30-A primary ratings for low-level pickup. C MPS-RTD Temperature Input Module Optional module provides 8 inputs to connect Pt100, Ni100, Ni120, and Cu10 RTDs. D MPS-DIF Differential Current Module Optional motor differential protection, compatible with core balance and summation current transformer connections. ® NOTE: One of the following is required: MPU-CIM-00-00 Current Input Module, or M PHASE CTModule with ring-tonque terminals. MPU-CTI-RT-00 Current Input RTD x 8 MPS-RTD (Temperature Input Module) Phase Current Transformers Phase CTs are required to detect phase currents. For upgrade applications, existing CTs can be used. Optional Rev: 4-B-091514 Based on Manual Rev 5-A-090514 Protection Relays & Controls Motor Protection–Advanced MPU-32 SERIES (PGR-6200) Motor Protection Unit Features & Benefits FEATURES IEEE # BENEFITS 49, 51 Extends motor life and prevents insulation failures and fires Provides protection through starting, running, and cooling cycles Remotely view measured values and event records, reset trips, and access setpoints 50G/N, 51G/N Prevents catastrophic failures and fires Overload Dynamic thermal model Communications Ground fault Current unbalance/ Phase loss/Phase reverse RTD temperature Phase loss/Phase reverse (current) Overcurrent Jam Undercurrent PTC overtemperature Starts per hour Differential Reduced overcurrent mode Metering MPU-CIM Analog output Data logging Conformal coating 46 Prevents overheating due to unbalanced phases 38, 49 46 50, 51 RTD temperature protection (MPS-RTD module) for high-ambient or loss-of-ventilation protection Detects unhealthy supply conditions Prevents catastrophic failures and fires; extends motor life Prevents motor damage by detecting mechanical jams or excessive loading Detects low level or no-load conditions Overtemperature (PTC) protection for high-ambient or loss-of-ventilation detection Limits the motor starts per hour to prevent overheating Optional MPS-DIF module for sensitive winding-fault protection Minimizes arc-flash hazards during maintenance View measured and calculated parameters with on-board display Separate current input module to reduce risk of open-CT hazard and for convenient installation Provides means for metering selectable parameters On-board 100-event recorder for data logging Internal circuits are conformally coated to protect against corrosion and moisture 37 49 66 87 Wiring Diagram PHASE CURRENT TRANSFORMERS Specifications GROUND-FAULT CURRENT TRANSFORMER (required) (recommended) A MPS-RTD B INPUT MODULE (optional) C MPU-CIM MPS-DIF CURRENT INPUT MODULE DIFFERENTIAL MODULE 2 (optional) D TEMPERATURE INPUT 13 14 15 16 17 18 19 CIM 21 26 22 23 + 24 27 31 ...... I/0 MODULE 4-20 mA ANALOG OUTPUT 25 DIG IN MOTOR PROTECTION UNIT MPU-32 RELAY 3 RELAY 2 12 11 RELAY 1 10 9 8 7 6 5 4 3 2 1 1 Protective Functions Overload (49, 51) RTD temperature (38, 49) (IEEE Device Numbers) Phase reverse (current) (46) Unbalance (current) (46) Overcurrent (50, 51) Starts per hour (66) Jam Differential (87) Ground fault (50G/N, 51G/N) Phase loss (current) (46) PTC overtemperature (49 Undercurrent (37) Input Voltage 65-265 Vac, 25 VA; 80-275 Vdc, 25 W Power-Up Time 800 ms at 120 Vac 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 Mounting (Control Unit) Panel (standard) Surface (with MPU-32-SMK converter kit) (Current Input Module) DIN, Surface Approvals CSA certified, CE (European Union), UL Recognized, C-Tick (Australian) CONTROL POWER © 2014 Littelfuse Protection Relays & Controls Littelfuse.com/mpu-32 Rev: 4-B-091514 Based on Manual Rev 5-A-090514