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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.
Motor Protection Unit
Current Input Module (MPU-CIM) 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 requiring ring-tongue terminals.
- Overload
- Dynamic thermal model
- Communications
- Ground fault
- Current unbalance/Phase loss/Phase reverse (current)
- RTD temperature
- Phase loss/Phase reverse (current)
- Overcurrent
- Jam
- Undercurrent
- 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
- Prevents catastrophic failures and fires
- Prevents overheating due to unbalanced phases
- RTD temperature protection (MPS-RTD module) for high-ambient or loss-of-ventilation protection
- Detects unhealthy supply conditions
- Prevents catastrophic failures and fires and extends motor life
- Prevents motor damage by detecting mechanical jams or excessive loading
- Detects low level or no-load conditions
MPU-32 Parts
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MPU-32 Applications
- Low and medium voltage motors
