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Eaton generator relay

Eaton’s Generator Relays (EGR5000) are preferred by users because of their unmatched versatility and dependability. These multifunctional relays provide control and backup protection for medium- to large-sized generators. The EGR’s zone-selective interlocking function improves coordination and tripping time. The unique design provides complete metering, protection, and control in a single compact case, saving panel space and overall cost.

Eaton generator relay

Eaton’s motor generator family–EMR Series

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

EGR-5000 generator relay

Eaton EGR-5000 generator relay

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

51V— Voltage restraint elements

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

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

49/51— Thermal protection element

67P/67R/67X— Directional overcurrent elements

46— Current unbalance elements

47— Voltage unbalance elements

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

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

59N— Ground fault overvoltage element

81U/O— Underfrequency and overfrequency elements

78V— Vector surge element

55A/55D— Apparent and displacement power factor elements

32— Forward and reverse watts elements

32V— Forward and reverse VARs elements

24— Over-excitation, volts-per-hertz

27T— Low voltage ride-through (LVRT)

27Q— Reactive power and undervoltage

(64S) 27TN/59N— Stator ground fault

46G— Generator unbalance

40— Loss of excitation

25— Sync check

79— Auto-reclosing

86— Lockout

LOP— Loss of potential

CLPU— Cold load pickup

SG Wear— Switchgear wear

SOTF— Switch on to fault

CTS— Current transformer supervision

74TCM— Trip coil monitor

ZI— Zone selective interlocking

87— Phase current differential protection

87H— Unrestrained high-set differential current protection

87GD— Restricted ground fault protection

87GDH— High set restricted ground fault protection

50/27— Inadvertent energization

Typical one-line example—ANSI protective elements guide

ANSI protective elements guide for Eaton generator relays

Protective elements key

  EGR-5000 Functions

Program for your specific application
Consistent with E-Series family of products

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
The E-series family platform makes it easy for users to program simple to complex settings or schemes for each of their unique applications.

Eaton E-Series Relays

    Generator relay core features

    • Microprocessor-based protection with monitoring and control for medium to large sized generators. 
    • Complete metering of voltage, currents, power, energy, minimum/maximum and demand functions. 
    • Complete metering, protection, and control in a single compact case to reduce panel space, wiring and costs. 
    • 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 for providing customized protection and control solutions. 
    • 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 RS-232 port and Powerport-E software provides local computer access and user-friendly windows based interface for relay settings, configuration, and data retrieval. 
    • Breaker open/close from relay faceplate or remotely via communications. 
    • 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.

    Keep your operations up and running

    Eaton’s E-Series microprocessor-based protective relays offer reliable, secure and complete protection and control of power generation and distribution systems. Generator protection relays can be used to protect any size generator, and also be used as a primary or backup protection in standby generators and co-generation applications.