The MPU-32 series Motor Protection Unit is used to provide current and 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. 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.
Features & Benefits:
- Overload: Extends motor life and prevents insulation failures and fires
- Dynamic thermal model: Provides protection through starting, running, and cooling cycles
- Communications: Remotely view measured values and event records, reset trips, and access setpoints
- Ground fault: Prevents catastrophic failures and fires
- Current unbalance/Phase loss/Phase reverse (current): Prevents overheating due to unbalanced phases
- RTD temperature: RTD temperature protection (MPS-RTD module) for high-ambient or loss-of-ventilation protection
- Phase loss/Phase reverse (current): Detects unhealthy supply conditions
- Overcurrent: Prevents catastrophic failures and fires and extends motor life
- Jam: Prevents motor damage by detecting mechanical jams or excessive loading
- Undercurrent: Detects low level or no-load conditions
- PTC overtemperature: Overtemperature (PTC) protection for high-ambient or loss-of-ventilation detection
- Starts per hour: Limits the motor starts per hour to prevent overheating
- Differential: Optional MPS-DIF module for sensitive winding-fault protection
