EL731 AC/DC Sensitive Earth Leakage Monitoring Relay

The littlefuse EL731 earth Leakage Monitoring Relay is a microprocessor-based AC/DC Sensitive Earth-Leakage Relay that offers complete coverage for all frequencies from 0-6,000 Hz. Its adjustable trip setting provides a wide range of low-level protection and system coordination. In addition, the EL731 has a universal power supply which provides flexibility for numerous applications.

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Feature

  • RTD/PTC temperature option
  • Password-protected alarm & trip settings
  • Ability to detect ground faults on grounded DC systems
  • 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

Applications

  • Service entrance ground fault protection
  • General industrial use

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)

 

 

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