Eaton EAFR-101C arc point sensor relay

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, serviced, 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 .

Eaton reserves right to changes without further notice .

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

MV – Medium voltage

NC – Normally closed

NO – Normally open

PMSG – Permanent magnet synchronous generator

Rx – Receiver

SF –    System failure

SW – Software

Tx – Transceiver

uP2– Microprocessor

General

The Eaton arc flash relay 101C (EAFR-101C) is a sophisticated

micro-processor based arc flash protection relay including complete

self-supervision functionality .  It is designed to minimize the damage

caused by an arcing fault (arc flash) by sensing light from the point

sensor and acting to trip the circuit breaker sourcing the fault

current .  The EAFR-101C complete system self-supervision function

provides the highest level of dependability by continuously monitor

ing all internal system functions along with external connections .

The EAFR-101C is designed according to the latest protection relay

standards and is therefore suitable for installations in rough environ

ments, such as utility, traditional or renewable power plants, off

shore, marine, oil and gas, mining, steel, or any other heavy industry

applications .  It is also well suited for commercial and institutional

electrical systems .  The EAFR-101C is suitable for either medium

voltage or low voltage switchgear and motor control center applica

tions in both new and retrofit installations .

EAFR-101C features

The EAFR-101C is a multipurpose arc flash protection relay that can

receive light from four different channels of light point sensors and

can be applied for variety of applications .  The EAFR-101C can be

used as a stand-alone relay or as part of a more complex arc protec

tion system through the binary bus .

Main features of EAFR-101C:

• (110-220) Vac / (125-250) Vdc  auxiliary  power  supply;

• (18-72) Vdc optional power supply;

• Four arc point sensor channels (S1. S2. S3. and S4);

• Six binary inputs (BI1. BI2. BI3. BI4. BI5. and BI6) nominal voltage

of 24 Vdc;

• Three normally open trip relay outputs with direct trip circuit rated

contacts (T1. T2. and T3);

• One normally open electronic lock-out trip relay with direct trip

circuit rated contacts (T2);

• Two 24 Vdc binary outputs (BO1 and BO2);

• One system failure relay, form C output (SF);

• 16 indication LEDs; and

• One push-button (SET)

Operation and configuration

LED indicator functions

The EAFR-101C contains 16 indication LEDs .  A user definable text

pocket can be slid in under the label for identifying each LED func

tion (except POWER and ERROR LEDs) .  LEDs are located at the

front plate of the relay for clear viewing without a need for opening

doors .

During power up, the relay performs an LED test .  All LEDs are

turned on for two seconds and then off .  Only the blue POWER LED

will remain on .  After powered up, the relay goes into protection

mode in 50 ms even while the LED test is being performed .

During normal operation, the blue power LED is ON, as are any CB

open/close status LED’s for connected CB’s .

The sensor LEDs are off during the inactive condition .  If  a point arc

sensor is activated, the corresponding sensor channel LED will turn

on if the activation is longer than 1 .5 ms .  The sensor LED activation

function is latched (steady light) .  To clear the LED, the “SET” button

should be pressed .

In case of a loose sensor wire and binary input wires or configura

tion mismatch (new sensor attached without running auto-configu

ration system setup (see Section 3 .3 .1) situation, the corresponding

LED for that sensor will start flashing and the ERROR LED will

activate .

The Binary I/O LEDs indicate the I/O-line status .  If any of the lines

become active for more than 1 .5 ms, the corresponding LED will

turn on (latch) .

In a trip situation, the corresponding trip LED will turn on .  Trip

outputs are controlled by the dipswitch settings (see Section  3 .5) .

All activation and trip indication LEDs are latched, even if the

dipswitch setting is in the non-latched mode .  They have to be

cleared by pushing the “SET” button .

LED indications are stored in non-volatile EPROM memory for iden

tifying the trip information in case the auxiliary power is lost .  When

re-powering the relay after power supply loss, the actual LED status

can be visualized from the front of the relay