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Figure 11. EAFR-07 Arc Light Fiber Optic Loop Sensor
(Glass).
Table 6. Technical Data for the EAFR-07 Arc Light Fiber
Optic Loop Sensor (Glass).
Light Intensity Threshold
Detection Radius
Maximum Length
Diameter
Bending Radius
Operating Temperature
4.4 Arc Light Fiber Optic Loop Sensor (High
Temperature) EAFR-08
The EAFR-08 is an arc light fiber optic loop sensor used for
high temperature applications. It is developed to withstand
temperatures of up to 125°C (257°F) and is therefore suit-
able for installation in wind turbine windings. The EAFR-08
fiber is a robust fiber optic cable providing practically unlimit-
ed bending radius. The EAFR-08 contains hundreds of glass
fiber strands covered by a plastic tube making it extremely
strong. EAFR-08 loop sensors can be ordered in pre-manu-
factured lengths of 10, 15, 20, 25, 30, 35, 40, 45, 50 m (33
to 164 ft). The EAFR-08 loop sensor fiber optic cable should
be distributed throughout the protected switchgear cells.
The EAFR-08 is not recommended to be cut and/or spliced
on site. If accidental breakage of the loop sensor occurs,
Eaton recommends replacing the loop sensor. Contact your
nearest Eaton representative for more information.
The fixed light sensitivity of the EAFR-08 loop sensor is
8,000 Lux. The sensor does not require user settings. The
loop sensor's detection radius is 360 degrees (see Figure
12).
EAFR-110 Current and Arc Light Sensor Relay User Manual MN026007EN February 2016 www.eaton.com
8,000 Lux
360 degrees
50 m (164 ft)
1.2 mm (0.047 in.)
1 cm (0.394 in.)
-40 to 85°C (-40 to 185°F)
Figure 12. EAFR-08 Arc Light Fiber Optic Loop Sensor
(High Temperature).
Table 7. Technical Data for the EAFR-08 Arc Light Fiber
Optic Loop Sensor (High Temperature).
Light Intensity Threshold
Detection Radius
Maximum Length
Diameter
Bending radius
Operating temperature
If any of the EAFR-06, 07 , or 08 loop sensor ends
N
otee:
need to be covered to avoid light detection from out-
side the protected zone consult your nearest Eaton
representative for more information.
4.5 Sensor Type Dependencies
Different sensor types can be utilized in different arc flash
protection units of the Eaton Arc Flash Relays. The Table 8
describes the dependencies.
Table 8. Arc Sensor Dependencies.
EAFR-01
EAFR-06
Point Sensor
Plastic Loop
Sensor
EAFR-101
Yes
Yes (with
Fiber
Option)
EAFR-102
No
Yes
EAFR-110P Yes
Yes (with
Fiber
Option)
EAFR-110F
No
Yes
4. Arc Sensors
8,000 Lux
360 degrees
50 m (164 ft)
1.2 mm (0.047 in.)
1 cm (0.394 in.)
-40 to 125°C (-40 to 257°F)
EAFR-01
EAFR-01
Glass Loop
High Temperature
Sensor
Loop Sensor
Yes (with
Yes (with Fiber
Fiber
Option)
Option)
Yes
Yes
Yes (with
Yes (with Fiber
Fiber
Option)
Option)
Yes
Yes
13
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