7
Instruction Booklet
IB0191002EN
Effective November 2019
EAFR-101C arc point sensor relay
user manual
EATON
www.eaton.com
4 Arc sensors
The EAFR series provides the choice of different types of arc
sensors to be utilized in different units and different switchgear
types, according to the specific application requirements . Available
sensor types are arc light point sensors and arc light fiber optic loop
sensors .
Arc light point sensors are typically installed in metal enclosed
compartments, providing quick accurate location of the faulted area .
Arc light fiber loop sensors are installed typically to cover a wider
protected area with one fiber when no need for more exact fault
location exists . The EAFR-101C only accepts light point sensors .
4.1 Arc light point sensor EAFR-01
The EAFR-01 is an arc light point sensor with a light sensitive photo-
diode element activated by receiving arc light . The EAFR-01 arc
sensors should be mounted in the switchgear cubicles in such a way
that the light sensitive part can receive light from the protected area .
The fixed light sensitivity of the EAFR-01-A sensor is 8,000 Lux . The
sensor does not require any user settings . The point sensor’s light
detection radius is 180 degrees . Other point sensors are available
with different Lux sensitivities: EAFR-01-B at 25,000 Lux and EAFR-
01-C at 50,000 Lux .
Figure 4. EAFR-01 arc light point sensor.
4.1.1 EAFR-01 installation and wiring
The EAFR-01 point sensor can be installed either on or through the
compartment wall . An example of on the wall mounting is seen in
Figure 55 . The EAFR-01 is fixed against the wall using two screws .
The same screw pattern is utilized in a through wall mounting
arrangement . In this arrangement, the unit is turned around and the
point of the eye of the photodiode sensor protrudes through a small
hole cut in the wall . The point of the sensor now faces the compart-
ment to be protected . This allows for the body of the sensor and
cabling to be located outside the compartment . For both types
of installation, two screws are attached from the back side of the
sensor . No external mounting plates are needed .
The EAFR-01 cable connectors are located beneath the covers that
can be conveniently detached for fastening the sensor wires . The
cover will be attached after installing the wires . The cable connec-
tors are located at both ends of the sensor for series connecting a
maximum three sensors in one line .
Figure 5. EAFR-01 point sensor mounted to the compartment
wall.
Table 3. 100 Ω Compatible.
Manufacturer
Part no.
Data AWG
Cable diameter mm (in.)
Temperature rating °C (°F)
Voltage rating
Belden
9154
20
5.03 (0.198)
-20/+80 (-4/+176)
300 V
