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ARCON 3G
ARCON 3G MANUAL
MN026015EN October 2020 www.eaton.com
RUN LED:
Green 1Hz
Ready for ignition command
Off
NOT ready
TRIP LED:
Red
Trip state
Off
No trip
The arc quenching device (ARC-AT) is a 3-pole rapid short-circuit device which is able
to extinguish the arc fault within less than 2 ms arc mitigation time (interval of time
between the ignition of the internal arc-fault and the complete extinction of the same).
Two pressure elements based on pyrotechnical principles serve as the switching drive,
providing the necessary energy upon tripping to drive the switch.
In case of a busbar selective system structure one quenching device per main busbar
section has to be installed in the low voltage switchgear assembly.
Figure 3.11 Extended system – Arc quenching device
With regard to the lifespan of the pyrotechnic actuators it is recommended that the
quenching device (ARC-AT) is to be replaced after 15 years of service.
The replacement of the quenching device can be done by Eaton After Sales Service
or any licensed Eaton panel builder, who has special training in handling pyrotechnical
equipment and are authorized to conduct this kind of operation.
Disused or tripped quenching devices must be returned to the Eaton After Sales Service
for proper disposal anyway.
You are not allowed to open the ARCON quenching device (ARC-AT) under any
circumstances, it contains pyrotechnic actuators that can explode and cause
serious injury, if handled improperly.
Arc quenching device
Additional product characteristics in compliance with IEC 60947-9-1:2019
Subclause 5.5
Maximum voltage drop in low-impedance state
20 V (peak)
(Maximum peak value of voltage between the main circuit terminals
of the AQD, in the low-impedance state, when carrying the current
corresponding to its rated short-time withstand current.)
Subclause 5.6
Maximum operating time
0.45ms
(Maximum time between receiving the triggering signal and the AQD
steadily reaching the low-impedance state.)
Subclause 5.8
Maximum permissible temperature of the AQD main circuit terminals
+75°C
Subclause 7
Ambient temperature in the vicinity of the AQD (during operation)
-40°C … +70°C
Proof 1 — October 29, 2020 3:00 PM
