Protection Relays


  • EL731

  • Operates on AC resistance grounded systems and DC grounded systems. The EL731 is a microprocessor-ba...More

  • Supply
    Voltage
    (VAC):
     120/240, 24

  • Supply
    Voltage
    (VDC):
     120/ 240, 120/240, 24, 48

  • Relay
    Contacts:
     Three Form C (N.O./N.C.)

  • SE-601

  • Operates on DC ungrounded systems ranging from industrial 24- Vdc control circuits to 1000-Vdc solar...More

  • Supply
    Voltage
    (VAC):
     120 - 240

  • Supply
    Voltage
    (VDC):
     100 - 240, 12-30, 40 - 55

  • Relay
    Contacts:
     One Form A (N.O.); One Form B (N.C.)

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 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

EL731 Fig1 Outline Mounting Detail CAD Drawing

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 EL731 Industrial Electrix Article 2015

pdf icon Underground Coal - Going to Ground Article

pdf icon SE-601 Manual

The SE-601 is a microprocessor-based ground-fault monitor for ungrounded dc systems. Its output relay can operate in the fail-safe or non-fail-safe mode for undervoltage or shunt-trip applications.

pdf icon SE-601 Manual Spanish

SE-601 3D Model

SE-GRM500 3D Model

Littelfuse Protection Relays SE-601 CAD Drawing

pdf icon SE-601 Datasheet

Littelfuse Protection Relays SE 601 R13 CAD Drawing

Littelfuse Protection Relays SE GRM 010-125

Littelfuse Protection Relays SE GRM 500