EL731 Series - 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.

COMPUTER TO RELAY CONNECTION

Connect the EL731 to the network using a standard Ethernet patch cable. Use of a crossover cable to connect the EL731 directly to the computer running IP-Config is not recommended. A typical router will assign an IP address to all connected computers that are using DHCP. The EL731 does not support the use of DHCP. If the EL731 is being set-up for first time, it is recommended to only have one EL731 connected to the network to prevent communication errors.

Click here to download the COMPUTER TO RELAY CONNECTION Diagram.

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)CommsIEEE Device NumbersRelay
Contact
Operating
Mode
Compare
EL731-00-X0ul120/240120/240Three Form C (N.O./N.C.)CSA; UL; C-Tick4-2038
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe
EL731-01-X0ul120/240120/240Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20DeviceNet38
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe
EL731-02-X0ul120/240120/ 240Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Profibus38
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe
EL731-03-X0ul120/240120/240Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20EtherNet
IP
38
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe
EL731-04-X0ul120/240120/240Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Modbus TCP38
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe
EL731-10-X0ul2448Three Form C (N.O./N.C.)CSA; UL; C-Tick4-2038
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe
EL731-11-X0ul2448Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20DeviceNet38
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe
EL731-12-X0ul2448Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Profibus38
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe
EL731-13-X0ul2448Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20EtherNet
IP
38
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe
EL731-14-X0ul2448Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Modbus TCP38
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe
EL731-20-X0ul24Three Form C (N.O./N.C.)CSA; UL; C-Tick4-2038
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe
EL731-21-X0ul24Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20DeviceNet38
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe
EL731-22-X0ul24Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Profibus38
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe
EL731-23-X0ul24Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20EtherNet
IP
38
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe
EL731-24-X0ul24Three Form C (N.O./N.C.)CSA; UL; C-Tick4-20Modbus TCP38
49
50G
50N
51G
51N
79G
Fail-safe
Non Fail-safe

pdf icon EL731 Datasheet

pdf icon EL731 Manual

pdf icon EL731 Spanish Manual

El EL731 es un relé de fuga a tierra con microprocesador, para circuitos de potencia de CA,CC, CA/CC combinadas y de frecuencia variable suministrado por sistemas de resistencia a tierra o con conexión sólida a tierra que requieren la detección de fuga a tierra mínima de 30 mA (menor a la configuración predeterminada ).

pdf icon EL731 DeviceNet Manual

This document describes the AC-700-CUA-01 Communications Upgrade Adapter DeviceNet features supported by the EL731.

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 White Paper - Ground-Fault Protection with VFDs

pdf icon White Paper - Protección de falla a tierra en variadores de frecuencia

Cómo utilizar un relé sensible a la tensión para encontrar fallas a tierra difíciles de hallar en variadores de frecuencia (VFD) de sistemas de resistencia eléctrica con conexión a tierra.

pdf icon EL731 Firmware Update Instructions

pdf icon Underground Coal - Going to Ground Article


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