2
Instruction Booklet
IB0191002EN
Effective November 2019
EAFR-101C arc point sensor relay
user manual
EATON
www.eaton.com
CAUTION
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.
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, 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 .
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
2 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 .
2.1 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) .
Figure 1. The EAFR-101C arc protection IO relay.
