EL731-21-X0 - EL731 Series

Series: EL731
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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.


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.

Property (Mouseover for details) Value
Communications DeviceNet
Dimensions 1.9H X 3.8W X 5.0D
Frequency 0 - 6000
Check Stock No

ul UL_KDAX_E340889

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 Profibus Manual

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 Manual

dwg EL731 Fig1 Outline Mounting Detail CAD Drawing

pdf icon TN CT-03 Locating Phase Conductors in a Zero-CT Window

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

pdf icon Ground-Fault Protection with VFDs

How to use a Sensitive Relay to Find Hard-to-Spot Ground Faults in VFDs on Resistance-Grounded Systems

pdf icon 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 EL731 Industrial Electrix Article 2015

pdf icon Underground Coal - Going to Ground Article

pdf icon TN GF-03 Ground-Fault Misconceptions

pdf icon TN GF-05 Ground-Fault Monitor Comparison

pdf icon TN GF-10 Pulsing Ground-Fault Systems

pdf icon Protection Relays and Controls Catalog - Mandarin

pdf icon EL731 Datasheet

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