Introduction; Abbreviations; General; Arc Protection Relay Eafr-102 Features - Eaton EAFR-110 User Manual

1. Introduction

Read these instructions carefully and inspect the equipment
to become familiar with it before trying to install, operate,
service, or maintain it.
Electrical equipment should be installed, operated, ser-
viced, and maintained only by qualified personnel. Local
safety regulations should be followed. No responsibility is
assumed by Eaton for any consequences arising out of the
use of this material.
We reserve right to changes without further notice.

1.1 Abbreviations

CB – Circuit breaker
CBFP – Circuit breaker failure protection
EMC – Electromagnetic compatibility
EPROM – Erasable programmable read only memory
HW – Hardware
LED – Light emitting diode
LV – Low voltage
ms – Millisecond
MT - Master trip
MV – Medium voltage
NC – Normally closed
NO – Normally open
SF – System failure
SW – Software
uP – Microprocessor
EAFR-110 Current and Arc Light Sensor Relay User Manual MN026007EN February 2016 www.eaton.com

2. General

The Eaton Arc Flash Relay (EAFR)-110 is a sophisticated
micro-processor based arc flash protection relay with
combined current and arc sensing. Combined current and
arc sensing provides an integrated dual trip criteria. It is
designed to minimize the damage caused by an arcing fault
(arc flash) by tripping the circuit breaker sourcing the fault
current. The EAFR-110 complete system self-supervision
function provides the highest level of dependability by con-
tinuously monitoring all internal system functions along with
external connections.
The EAFR-110 is designed according to the latest protection
relay standards and is therefore suitable for installations in
any environment, such as utility, traditional or renewable
power plants, off shore, marine, oil and gas, mining, steel,
or any other heavy industry applications, as well as com-
mercial and institutional electrical systems. The EAFR-110
is suitable for either medium voltage or low voltage switch-
gear and motor control center applications in both new and
retrofit installations.
The EAFR-110 series of relays come in 4 different styles.
The EAFR-110F style is a protective relay with light sensing
fiber loop sensors and output relay T3 is in a normally open
configuration. The EAFR-110FB is the same fiber sensor
unit with output relay T3 in a normally closed configura-
tion. EAFR-110P is a protective relay with light sensing
point sensors and relay T3 in a normally open configuration.
EAFR-110PB is the same point sensor unit with relay T3 in a
normally closed configuration.
1. Introduction
1