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Eaton motor relay

Eaton’s Motor Relays (EMR3MP0, EMR3000, EMR4000 and EMR5000) provide unparalleled motor protection. These relays are most commonly applied to medium-voltage or larger motors. Users appreciate the multiple protection functions, which include zone-selective interlocking and programmable logic control. EMR’s integral test function reduces maintenance time and expense, while the self-diagnostics and reporting increase uptime and simplifies troubleshooting.

Eaton motor relay

Retrofit option - simplified settings

The EMR-3MP0 provides basic motor protection based on motor nameplate data.  The EMR-3MP0 has been specially designed to simplify settings and configurations.

Standard relay and MP-3000 replacement kits

  • EMR-3MP0 relay
  • Cutout adapter panel
  • Conversion box assembly

See the document, EMR-3MP0 installation instructions, located  on the resources tab for more information.

Motor Relays - Simple Instruction

Flexible configuration options and multiple settings groups

The EMR-3000 is a current-only motor relay with flexible configuration options and multiple settings groups. 

The EMR-4000 has the same features as the EMR-3000 but adds voltage protection and metering. 

The EMR-5000 builds on the EMR-4000 by adding motor differential protection and a larger display.

Eaton’s motor relay family–EMR Series

Use the following chart to compare the protective funtions of Eaton's E-series motor relays.

EMR-3000 motor relay

Eaton EMR-3000 motor relay

The EMR-3000 is a current-only motor relay with flexible configuration options and multiple settings groups.


50BF— Breaker failure

50P— Phase instantaneous overcurrent elements

50R— Calculated ground or neutral instantaneous overcurrent elements

50X— Measured ground or neutral instantaneous overcurrent elements

51P— Phase overcurrent protection per time-current curve elements

51R— Calculated ground fault protection per time-current curve elements

51X— Measured ground or neutral fault protection per time-current curve elements

46— Current unbalance elements

49/38— Thermal protection using optional URTD module

49/51— Thermal overload protection (I2 T)

49S/51— Locked rotor

50J— Jam or stall protection

37— Underload protection

66— Starts per time period

14— Underspeed

CTS— Current transformer supervision

74TCM— Trip coil monitor (option)

ZI— Zone selective interlocking (option)

86— Lockout protection

EMR-4000 motor relay

Eaton EMR-4000 motor relay

The EMR-4000 has all of the same protection functions as the EMR-3000 with the following additional features.

 

27A/M— Auxiliary and main three-phase undervoltage elements

47— Voltage unbalance elements

55A/D— Apparent and displacement power factor elements

59A/M— Auxiliary and main three-phase overvoltage elements

59N— Ground fault overvoltage elements

32/32V— Forward and reverse watts and VARs elements

51V— Voltage restraint elements

78V— Vector surge element

81U/O/R— Under and over and rate of change frequency elements

LOP— Loss of potential

CLPU— Cold load pickup

SOTF— Switch on to fault

BRB— Broken rotor bar detection

EMR-5000 motor relay

Eaton EMR-5000 motor relay

The EMR-5000 has all of the same protection functions as the EMR-4000 with the following additional features.

 

87M— Differential current elements

Typical one-line example—ANSI protective elements guide

ANSI protective elements guide for Eaton motor relays

Protective elements key

 Elements available on all EMR models

 Elements available on EMR-4000 and EMR-5000

 Elements available on EMR-5000

Retrofit option - simplified settings

The EMR-3MP0 provides basic motor protection based on motor nameplate data.  The EMR-3MP0 has been specially designed to simplify settings and configurations.

Standard relay and MP-3000 replacement kits

  • EMR-3MP0 relay
  • Cutout adapter panel
  • Conversion box assembly

See the document, EMR-3MP0 installation instructions, located  on the resources tab for more information.

Motor Relays - Simple Instruction

Flexible configuration options and multiple settings groups

The EMR-3000 is a current-only motor relay with flexible configuration options and multiple settings groups. 

The EMR-4000 has the same features as the EMR-3000 but adds voltage protection and metering. 

The EMR-5000 builds on the EMR-4000 by adding motor differential protection and a larger display.

Common software tools

All E-series relays, including our E-series motor relays, use the same software interface for easy access to information and programming of settings. Whether you are using the front panel or the external software, the interface is the same on all models.

  • Operation 
  • System Parameters
  • Protection Parameters
  • Device Parameters
  • Control 
  • Logic 
  • Device Planning 
  • Service
industrial-plant-e-series-relays.jpg
The E-series family platform makes it easy for users to program simple to complex settings or schemes for each of their unique applications.
Improved coordination
Zone selective interlocking
Increased uptime
Reduced operation and maintenance

Eaton's E-Series Relays

    Motor relay core features

    • Use basic motor nameplate data to create a custom overload curve to accurately protect the motor.  Integral test function reduces maintenance time and expense.
    • Zone selective interlocking improves coordination and tripping time, and saves money compared to a traditional bus differential scheme.
    • Programmable logic control functions to accommodate different control schemes, simplify the wiring of the starter.
    • Automatically detects direction of the motor and eliminates the need of switching current inputs into the relay.
    • Reduce trouble shooting time and maintenance costs- Trip and event recording in non-volatile memory provides detailed information for analysis and system restoration. 6000 cycles of waveform capture aids in post fault analysis (viewable using Powerport-E software).
    • Minimum replacement time- Removable terminal blocks ideal in industrial environments.
    • Front USB port and Powerport-E software provides local computer access and user-friendly windows based interface for relay settings, configuration, and data retrieval.
    • Fast and easy troubleshooting, improved maintenance procedures and increased device security. Provides detailed traceability for system configuration changes.
    • Relays self-diagnostics and reporting improves uptime and troubleshooting. 

    Reliable protection for any size

    Eaton’s E-Series microprocessor-based protective relays offer reliable, secure and complete protection and control of power generation and distribution systems. Motor relays specifically provide you complete and reliable motor protection for any size motor at different voltage levels.