Introduction; Abbreviations; General; Eafr-101S Features - Eaton EAFR-101S 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.
Eaton reserves 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
MV – Medium voltage
NC – Normally closed
NO – Normally open
PMSG – Permanent magnet synchronous generator
Rx – Receiver
SF – System failure
SW – Software
Tx – Transceiver
uP – Microprocessor
EAFR-101S Arc Point Sensor Relay User Manual MN026005EN February 2016 www.eaton.com

2. General

The Eaton Arc Flash Relay 101S (EAFR-101S) is a sophisticat-
ed micro-processor based arc flash protection relay includ-
ing 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 tripping the circuit
breaker sourcing the fault current. The EAFR-101S complete
system self-supervision function provides the highest level
of dependability by continuously monitoring all internal sys-
tem functions along with external connections.
The EAFR-101S is designed according to the latest protec-
tion relay standards and is therefore suitable for installations
in rough environments, such as utility, traditional or renew-
able 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 sys-
tems. The EAFR-101S is suitable for either medium voltage
or low voltage switchgear and motor control center applica-
tions in both new and retrofit installations.

2.1 EAFR-101S Features

The EAFR-101S 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-101S can be used as a stand-alone relay or as
part of a more complex arc protection system through the
binary bus.
Main features of EAFR-101S:
(110-220) Vac / (125-250) Vdc auxiliary 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);
Three 24 VDC binary outputs (BO1, BO2, and BO3);
● ●
One system failure relay, form C output (SF);
● ●
17 indication LEDs; and
● ●
One push-button (SET).
● ●
1. Introduction
1