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MP3010
MP3010
MP3010

Eaton MP3010 MP-3000 Motor Protection Relay

  • Model: MP3010
  • Brand: Eaton (Cutler-Hammer)
  • Series: MP-3000
  • Core Function: Multifunctional motor protection and monitoring
  • Product Type: Motor Protection Relay
  • Key Specs: Fixed case; 5 A CT inputs; RS-232 communication; 120 VAC power supply
  • Condition: New Original / New Surplus
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Description

3. Key Technical Specifications

  • Application: Protection of three-phase motors (induction or synchronous) at any voltage level
  • Current inputs: 3-phase + ground; 5 A CT version (1 A versions available under other catalog numbers)
  • Power supply: 120 VAC
  • Case style: Fixed mount (semi-flush)
  • Communication: RS-232 (base MP3010); other variants offer INCOM, Modbus, or DeviceNet
  • Discrete inputs: 2
  • Output contacts: 4 Form C (trip + programmable auxiliaries)
  • Analog output: One 4–20 mA
  • Frequency: User-selectable 50 Hz or 60 Hz
  • Key protection functions: Intel-I-Trip overload (49/51), locked rotor, phase unbalance / negative sequence (46), instantaneous overcurrent (50), ground fault (50G), underload, starts-per-time, jam/stall, optional RTD protection via URTD module
  • Housing: Compact design fitting standard IQ cutout
  • Certifications: UL Recognized, cUL Listed, CSA Recognized
  • Note: Exact firmware revision, communication option, and any installed accessories (URTD, fiber, etc.) must be verified against the unit label and original system documentation.

4. Product Introduction

The Eaton MP3010 is a fixed-case version of the MP-3000 motor protection relay. It is a microprocessor-based device that provides comprehensive protection, monitoring, and starting control for three-phase motors of any size.

Engineers use the MP3010 on medium-voltage starters and critical larger motors where reliable overload, fault, and process-related protection is required. The relay combines advanced thermal modeling with programmable I/O and local indication in a compact fixed-mount package.

5. Troubleshooting Quick Reference

Symptom Possible Cause Relevance to this Part Quick Check Method Recommendation
Relay will not power up Incorrect or missing 120 VAC supply ✅ High Measure voltage at power terminals Restore correct 120 VAC supply
Unexpected trip Incorrect settings or CT ratio mismatch ✅ High Review overload curve, CT ratios, and trip history Verify settings against motor nameplate data
No communication RS-232 wiring or port configuration error ✅ Medium Check cable, baud rate, and port settings Correct communication parameters
Ground-fault element inactive or incorrect Residual vs. zero-sequence CT connection ✅ High Confirm ground CT type and wiring Prefer zero-sequence CT for best sensitivity
Analog output incorrect Scaling or configuration error ✅ Medium Verify 4–20 mA scaling and load resistance Reconfigure analog output parameters
Display or LEDs abnormal Internal fault or power quality issue ✅ Medium Note exact LED pattern and any error codes Document codes and replace relay if confirmed faulty

If the issue cannot be isolated, photograph the front panel, terminal labeling, and settings screens, then contact technical support with the full catalog number and firmware revision.

MP3010

MP3010

MP3010

MP3010

6. Frequently Asked Questions (FAQ)

Q: What does the Eaton MP3010 protect?
A: It provides multifunctional protection for three-phase motors, including overload, locked rotor, phase unbalance, ground fault, underload, and starts-per-time limiting. It is commonly applied on medium-voltage and larger motors.

Q: Is the MP3010 a current-only relay?
A: Yes. The base MP-3000 series is a current-only device. Voltage-related functions require additional modules or different relay families.

Q: What is the difference between MP3010 and other MP-3000 variants?
A: MP3010 is the fixed-case, 5 A CT version with RS-232. Other catalog numbers add INCOM, Modbus, DeviceNet, draw-out cases, or 1 A CT inputs.

Q: Can RTD temperature protection be added?
A: Yes. An external Universal RTD (URTD) module can be connected to provide RTD-based stator and bearing temperature protection.

Q: Does the relay support both 50 Hz and 60 Hz systems?
A: Yes. The frequency is user-programmable.

Q: Is this relay still supported?
A: The MP-3000 series is a mature product. New Surplus units remain available for maintenance of existing installations. For new projects, Eaton recommends evaluating current EMR-series motor protection relays.

Q: What condition and warranty do you offer?
A: We supply New Original / New Surplus stock. Units are inspected for basic functionality. Standard coverage is a 1-year warranty against defects. Provide the complete catalog number MP3010 (and any additional suffixes or style numbers) when ordering or requesting support.

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