Eaton ARCON 2.0 Series, Operation And Configuration Instructions. Technical Description

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9.2.4. Arc sensors
Mount the sensors on the switchgear in such a way that they cover the protection zone as
completely as possible. The line of sight must be free between the sensor and the supervised
area.
If point sensors are used in open compartments (such as bus-bar sections), there should be
a sensor approximately every 5 meters. Due to the wide detection range of the sensors and
the light refl ection inside the switchgear, the mounting position is not critical.
Connecting sensors ARC-SP to the I/O units
After mounting the sensors, connect them to the I/O units as follows:
• Draw the wire to the nearest I/O unit using the shortest route possible and cut it to a
suitable length.
• Connect the arc sensors to the screw terminals X1-1…20. The polarity of the arc sensor
cables is not critical.
Connecting the ARC-SL sensors to the I/O units
The sensors are delivered in standard lengths (to be specifi ed in the order) equipped with ter-
minals compatible with ARC-EL3/2.0 units.
After mounting the sensors, connect them to the I/O units as follows:
• Draw each end of the sensor to the I/O unit and carefully form a loop of the extra fi bre.
NOTE! Do not shorten the extra sensor fi bre unless you have appropriate terminal connectors.
• Connect the arc sensors to plug-in terminals X1-R1, T1…R3, T3. While the polarity of the
arc sensors is not critical, you must connect each end of the fi bre to the same channels.