EL731 Series

AC/DC Sensitive Earth-Leakage Relay

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Description

The EL731 is a microprocessor-based AC/DC Sensitive Earth-Leakage Relay that offers complete coverage for all frequencies from 0 to 6,000 Hz. Two CTs are required for the entire frequency range, or one CT can be used for only low- or high-frequency detection. An RTD/PTC sensor input allows over-temperature protection for a motor or drive. The EL731 offers metering, password-protected alarm and trip settings and optional network communications. It is primarily used to add low-level ground-fault protection to variable-speed drives, and to dc circuits.


Features & Benefits

  • Adjustable pickup (30-5,000 mA)

    Adjustable trip setting provides a wide range of low-level protection and system coordination

  • Frequency range (0-90 Hz, 20-6,000 Hz)

    Operate in either AC or DC mode or both. Use single or combined ranges. Separate metering

  • 32-char OLED display

    Earth-leakage metering, setup and programming

  • Local LED indication

    Visual Trip, Alarm, CT connection indication

  • CT-Loop monitoring

    Alarms when CT is not connected

  • Analog output (4-20 mA)

    Connect to DCS. Allows connection to an optional meter (PGA-0520) or control system

  • Adjustable time delay

    Adjustable trip delay for quick protection and system coordination

  • Alarm and trip settings

    Detect a deteriorating condition before damage occurs

  • Temperature-sensor input

    Drive or motor temperature protection

  • Output contacts

    3 programmable: Operate 2 alarm and 1 trip circuit

  • Network communication

    Optional connection to plant network

  • Harmonic filtering

    Eliminates nuisance tripping due to harmonic noise

  • Microprocessor based

    No required calibration saves maintenance cost

  • Universal power supply

    Provides flexibility for numerous applications


EL731 Datasheet

EL731 Manual

EL731 Profibus Manual

EL731 DeviceNet Manual

EL731 EthernetIP Interface Manual

EL731 Modbus TCP Interface Manual

AC700 CUA Manual

Specifications

  • IEEE Device Numbers: AC ground fault (50G/N, 51G/N), DC ground fault (79G), PTC overtemperature (49), RTD temperature (38, 49)
  • Supply Voltage: 120/240 Vac/Vdc, 24 Vdc, 48 Vdc/24 Vac
  • Trip Level Settings: 30-5,000 mA AC and DC
  • Alarm Level Settings: 30-5,000 mA AC and DC
  • Trip Delay: 0.05-2 s
  • Output Contacts: 3 Form C (programmable)
  • Contact Operating Mode: Fail-safe & non-fail-safe
  • Reset: Front panel and remote
  • Freq. Response, CT1: 0-90 Hz
  • Freq. Response, CT2: 20-6,000, 190-6,000, 20-90, 20-3,000 Hz; selectable
  • Current Transformer: EFCT-x series
  • CT Detection: Open & short detection
  • Terminals: Plug-in, wire clamping, 24 to 12 AWG (0.2-2.5 mm2)
  • Communications: EtherNet/IP™, DeviceNet™, Profibus®, Modbus® TCP (optional)
  • Analog Output: 4-20 mA (selectable 0-5 A or 0-100% trip-level setting)
  • Conformal Coating: Standard feature
  • Dimensions: H 48 mm (1.9”); W 96 mm (3.8”); D 129 mm (5.0”)
  • Approvals: UL Listed (E340889), CSA, RCM (Australia), CE
  • Warranty: 5 years
  • Mounting: Panel; Surface and DIN (with optional AC700-SMK)



Ordering Information

ORDERING NUMBERCONTROL POWERCOMMUNICATIONS
EL731-00-X0120/240 VAC/VDCNone
EL731-01-X0120/240 VAC/VDCDeviceNet™
EL731-02-X0120/240 VAC/VDCProfibus®
EL731-03-X0120/240 VAC/VDCEtherNet/IP™
EL731-04-X0120/240 VAC/VDCModbus® TCP
EL731-10-X048 VDC & 24 VACNone
EL731-11-X048 VDC & 24 VACDeviceNet™


EL731-12-X048 VDC & 24 VACProfibus®
EL731-13-X048 VDC & 24 VACEtherNet/IP™
EL731-14-X048 VDC & 24 VACModbus® TCP
EL731-20-X024 VDCNone
EL731-21-X024 VDCDeviceNet™
EL731-22-X024 VDCProfibus®
EL731-23-X024 VDCEtherNet/IP™
EL731-24-X024 VDCModbus® TCP

  


Accessories

EFCT Series Earth-Fault Current Transformer
Required zero-sequence current transformer specifically designed for low level detection.

AC700-CUA Series Communication Adapter
Optional network-interface and firmware upgrade communications adapters field-install in EL731.

AC700-SMK DIN-rail & Surface-mount Adapter
EL731 plugs into adapter for back-plane mounting.