EL 731 - Sensitive Earth Fault Protection Relay - AS2081:2011

EL731 - Sensitive Earth Fault Protection Relay

If you are looking for an economical earth fault protection relay, that provides detection from DC (0 Hertz), to 6,000Hz, then look no further.
The EL731 is currently the only relay on the market, offering 24-240VDC, 110/240Vac supply voltage, 0-6kHz detection range, and AS2081-2011 compliance!

The EL731 is a microprocessor-based AC/DC Sensitive Earth-Leakage Relay that offers complete coverage for all frequencies from 0-6,000 Hz. Two CT’s 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. The EL731 offers metering capabilities, password-protected alarm and trip settings and optional network communications. It is used to add low-level ground-fault protection to variable-speed drives, and to dc currents.

Features & Benefits
  • 5 year warranty - each individual product heat soak tested with conformaly coated circuit boards
  • 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-0500) 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. DeviceNet, Profibus, Ethernet/IP and Modbus options available
  • Harmonic filtering - Eliminates nuisance tripping due to harmonic noise - employing Littelfuse Startco DFT Filtering
  • Microprocessor based - No required calibration saves maintenance cost
  • Universal power supply - Allows operation in application where one side of PT is faulted, provides flexibility for numerous applications
  • Approvals - CS, UL,C-Tick, AS2081(2011)
  • Related Products

    Communications Adapter Optional network-interface and firmware-upgrade communications adapter. Field installs in EL731..

    AC700 Data Sheet

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