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2. General
2.1 Arc Protection Relay EAFR-110 Features
The EAFR-110 is a multi-purpose arc flash protection relay
and can be applied to a variety of applications. The EAFR-
110 can be used as a stand-alone relay or as a main relay of
a more complex arc protection system through the binary
bus.
The EAFR-110 comes in two versions. The EAFR-110P sup-
ports four point sensor channels and, optionally, one fiber
sensor channel. The EAFR-110F supports three fiber sensor
channels. All other features are the same in both versions.
The main features of EAFR-110:
(110-220) Vac / (125-250) Vdc auxiliary power supply;
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Three phase current inputs IL1, IL2, and IL3 (1A / 5A
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nominal);
One ground (earth fault) current input Ig (1A / 5A nomi-
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nal);
Four arc point sensor channels and one arc fiber loop
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channel optionally (EAFR-110P) or three arc fiber loop
channels (EAFR-110F);
Two binary inputs (BI1, BI2) 24 Vdc;
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Two high-speed semiconductor trip outputs (direct trip
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circuit rated);
Two normally open (NO) trip relay outputs with direct trip
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circuit rated contacts (T1, T2, T3);
One normally open (EAFR-110F , EAFR-110P) or normally
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closed (EAFR-110FB, EAFR-110PB) electronic lock-out trip
relay with direct trip circuit rated contacts (T3);
One binary output (24 Vdc);
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One system failure relay, form C output (SF).
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2
EAFR-110 Current and Arc Light Sensor Relay User Manual MN026007EN February 2016 www.eaton.com
Figure 1. Arc Protection Relay EAFR-110.
2.2 Simplified Block Diagram
The simplified block diagrams in Figures 2 and 3 show the
main components of the EAFR-110 relay.
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