![background-waves](https://www.littelfuse.com/background_waves_image.png)
![MPS-family](https://cdn2.webdamdb.com/1280_jTnGYgP6Ho06AdzH.jpg?1732370333)
![Littelfuse-MPS-family](https://cdn2.webdamdb.com/1280_EGyh4u512ho41ImW.jpg?1732370331)
![MPS-CTU](https://cdn2.webdamdb.com/1280_YP9AF1CxXxc41c8Q.jpg?1732370386)
The MPS series Motor Protection System offers comprehensive voltage protection and starter control for medium voltage motors. The system monitors voltage, current, and temperature to provide a comprehensive package of protective functions. The MPS is a modular system with integrated protection, motor control, metering, and data-logging functions. This system is typically used to provide protection for three-phase low- and medium-voltage, medium to high-horsepower induction motors.
Operation
The Control Unit (MPS-CTU) is the core module. It can operate as a standalone unit or with the Operator Interface (MPS-OPI), RTD Modules (MPS-RTD), and Differential Module (MPS-DIF). The CTU can be programmed using the OPI or the communications network. Programmable inputs and outputs provide a flexible hardware platform and custom software can be easily loaded from a PC to the CTU’s flash memory.
Operator Interface (MPS-OPI)
Control Unit (MPS-CTU)
- Overload
- Current unbalance/Phase loss/Phase reverse
- Overcurrent/Jam
- Undercurrent
- Ground fault
- RTD temperature
- Overvoltage
- Undervoltage
- Voltage unbalance
- Phase differential
- Extends motor life and prevents insulation failures and fires
- Prevents overheating and extends motor life
- Prevents catastrophic failures and fires and extends motor life
- Detects low-level or no-load conditions
- Prevents catastrophic failures and fires
- Optional RTD temperature protection (MPS-RTD module) for high ambient or loss of ventilation protection
- Prevents stress to insulation
- Prevents a start attempt when it will damage the motor
- Detects unhealthy supply voltage
- Provides sensitive protection for high-resistance winding faults
MPS Parts
Filters
Part Number | Actions | Supply Voltage AC | Supply Voltage DC | Relay Contacts Config | Analog Output Current (mA) | Communications | IEEE Device Numbers | Relay Contacts Operation | Dimensions | Weight (kg) | Analog Inputs | Conformally Coated | Digital Inputs | Frequency (Hz) | GF Trip Level Range (%) | GF Trip Time (s) | Harmonic Filtering | Reset Type | Temp Sensor Config |
---|
Part Number | Actions | Supply Voltage AC | Supply Voltage DC | Relay Contacts Config | Analog Output Current (mA) | Communications | IEEE Device Numbers | Relay Contacts Operation | Dimensions | Weight (kg) | Analog Inputs | Conformally Coated | Digital Inputs | Frequency (Hz) | GF Trip Level Range (%) | GF Trip Time (s) | Harmonic Filtering | Reset Type | Temp Sensor Config | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
120 | Standard | |||||||||||||||||||
Standard | ||||||||||||||||||||
240 | Standard | |||||||||||||||||||
MPS Applications
- Motor protection