EL731 - AC/DC Sensitive Earth-Leakage Relay

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

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.

Harmonic filtering

Eliminates nuisance tripping due to harmonic noise

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

Access specifications, certifications, check availability and order parts below

Catalog #CertificatesSupply
Voltage
(VAC)
Supply
Voltage
(VDC)
Relay
Contacts
ApprovalsAnalog Output (mA)CommsStockSamples
EL731-00-00ul120/240120/240Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20
EL731-01-00ul120/240120/240Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20DeviceNet
EL731-02-00ul120/240120/240Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Profibus
EL731-03-00ul120/240120/240Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Ethernet/IP
EL731-04-00ul120/240120/240Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Modbus
EL731-10-00ul2448Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20
EL731-11-00ul2448Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20DeviceNet
EL731-12-00ul2448Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Profibus
EL731-13-00ul2448Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Ethernet/IP
EL731-14-00ul2448Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Modbus
EL731-20-00ul24Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20
EL731-21-00ul24Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20DeviceNet
EL731-22-00ul24Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Profibus
EL731-23-00ul24Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Ethernet/IP
EL731-24-00ul24Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Modbus

pdf icon EL731 Manual

pdf icon EL731 EthernetIP Interface Manual

This document describes the AC-700-CUA-03 Communications Upgrade Adaptor Ethernet/IP features supported by the EL731.

pdf icon EL731 Modbus TCP Interface Manual

This document describes the AC-700-CUA-04 Communications Upgrade Adaptor Modbus TCP features supported by the EL731.

pdf icon AC700-CUA-SM-R0-RSU Manual

Optional network-interface and firmware-upgrade communications adapter for the EL731.

EL731 Fig1 Outline Mounting Detail CAD Drawing

pdf icon TN CT-03 Locating Conductors in CT Window

An ideal window-type current transformer responds only to the sum of the currents fl owing through its window...

pdf icon Lowering the Limits for Earth-Fault Detection Manual

Current flowing to earth has only two paths—it can flow to earth through an earth fault, and it can flow to earth through distributed capacitance...

pdf icon EL731 Datasheet

pdf icon White Paper - Ground-Fault Protection with VFDs

pdf icon EL731 Firmware Update Instructions

pdf icon Underground Coal - Going to Ground Article


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