9
Instruction Booklet
IB0191004EN
Effective June 2020
EAFR-110PLV current and arc light
sensor relay user manual
EATON
www.eaton.com
3.7 Non-volatile memory
All critical system data including dipswitch settings and the auto-
configuration file described in Section 3.3.1 are stored in EPROM
non-volatile memory to ensure correct operation and full self-super-
vision, even if auxiliary power is temporarily lost.
Also all LED indications described in Section 3.3.1 are stored in
non-volatile memory in order to provide quick recovery of the system
status indication even if auxiliary power is temporarily lost. This
feature is especially important if auxiliary power is lost after tripping.
Non-volatile memory does not require a power supply to maintain
information and will retain settings and indication information perma-
nently without power.
4. Arc sensors
The EAFR-100 series provides the choice of different types of arc
sensors to be utilized in different units and different switchgear
types according to 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 clad compart-
ments providing quick accurate location of the faulted area. Arc light
fiber loop sensors are typically installed to cover a wider protected
area with one fiber when no need for more exact fault location
exists.
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 arc light. EAFR-01 arc sensors should
be mounted in the switchgear cubicles in such a way that the light
sensitive part covers the protected area as completely as possible.
One sensor per closed metal clad compartment should be utilized.
In open spaces, such as the bus bar section, arc sensors should be
mounted maximum 2 m (6.5 ft) apart.
The factory default set light sensitivity of the EAFR-01 sensor is
8,000 lux. This default set can be also designed as 25,000 and
50,000 lux according to the demand of user’s application. The
sensor does not require user settings. Detection radius is 180
degrees.
Figure 5. Arc light point sensor EAFR-01.
4.1.1 EAFR-01 installation and wiring
The EAFR-01 is installed either on the compartment wall or through
the wall. An example of wall mounting is seen in Figure 6. The
EAFR-01 is fixed to the wall using two screws. The same screw
pattern is utilized in through wall mounting arrangement as well. The
relay is turned around and the eye is pushed to the compartment to
be protected. Two screws are attached from the back side of the
sensor. No external mounting plates are needed in any case.
Figure 6. EAFR-01 point sensor mounted to the compartment
wall.
The EAFR-01 comes without a connection cable. Connection cable
installation at site is simple. The cable connectors are located
beneath the covers of the sensor and can be conveniently detached
for fastening the sensor wires. The covers will be reattached after
installing the wires. Cable connectors are located at both ends of
the sensor for series connecting a maximum three sensors in one
line (see Figure 5).
4.1.2 Technical data for EAFR-01 point sensor
Table 4. Technical data for the EAFR point Sensor.
Light intensity threshold
8,000 Lux (EAFR-01-A), 25,000 Lux
(EAFR-01-B), 50,000 Lux (EAFR-01-C)
Detection radius
180 degrees
Mechanical protection
IP 64
Sensor wiring arrangement
Two wires and shield
Sensor cable specification
Shielded, twisted pair 0.75 mm²
Maximum sensor cable length per
sensor channel
100 m (328 ft)
Operating temperature
-20 to 85°C (-4 to 185°F)