Measured input
Arc protection uses samples based on current measurements. If the required number of samples is
found to be above the setting limit, the current condition activates. The arc protection can alternatively
use either phase currents or residual currents in the tripping decision.
General settings
The following general settings define the general behavior of the function. These settings are static i.e.
it is not possible to change them by editing the setting group.
Table. 5.3.12 - 95. General settings of the function.
Name
Range
Default
Description
I/I0 Arc>
LN
mode
1: On
2: Blocked
3: Test
4: Test/
Blocked
5: Off
1: On
Set mode of ARC block.
This parameter is visible only when
Allow setting of individual LN mode is enabled in
General menu.
Channel
1
sensors
0: No
sensors
1: 1 sensor
2: 2 sensors
3: 3 sensors
1: No
sensors Defines the number of sensors connected to the channel (channels 1/2/3/4).
Channel
2
sensors
Channel
3
sensors
Channel
4
sensors
Channel
1 sensor
status
0: Sensors
OK
1:
Configuration
fault state
-
Displays the status of the sensor channel. If the number of sensors connected to the
channel does not match with the set "Channel 1/2/3/4 sensors" setting, this parameter
will go to the "Configuration fault" state.
Channel
2 sensor
status
Channel
3 sensor
status
Channel
4 sensor
status
Pick-up
The pick-up of each zone of the Iarc>/I0arc> function is controlled by one of the following: the phase
current pick-up setting, the residual current pick-up setting, or the sensor channels. The pick-up
setting depends on which of these are activated in the zone.
Table. 5.3.12 - 96. Enabled Zone pick-up settings.
Name
Description
Range
Step Default
Phase
current
pick-up
The phase current measurement's pick-up value (in p.u.).
0.05...40.00
x I
n
0.01
x I
n
1.2 x I
n
A
AQ
Q-T256
-T256
Instruction manual
Version: 2.06
© Arcteq Relays Ltd
IM00028
153
Summary of Contents for AQ-T256
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