U
0(ss)
Zero sequence voltage U
0
or synchrocheck voltage U
SS
8/16/32/64s/c
F tracked
1
Tracked frequency of reference 1
8/16/32/64s/c
F tracked
2
Tracked frequency of reference 2
8/16/32/64s/c
F tracked
3
Tracked frequency of reference 3
8/16/32/64s/c
*NOTE: In disturbance recorder there are two signals per each current channel, coarse and ne.
Coarse signal is capable of sampling in full range of the current channel but suffers loss of accuracy at
very low currents (under 3 amps). Fine signal is capable of sampling at very low currents but will cut off
at higher currents (I01 15A peak and I02 8A peak)
Recording settings and triggering
Disturbance recorder can be triggered manually or automatically by using dedicated triggers. Every
signal listed in “Digital recording channels” –list can be selected to trig the recorder.
IED has no maximum limit for number of recordings. Maximum amount is related to the size of the
recording. Amount of analog and digital channels together with sample rate and time setting do affect
to the recording size. For example in case that analogue channels IL1, IL2, IL3, I01, UL1, UL2, UL3
and U0 are selected, sample rate is 64 s/c and recording length is set to 1.0 seconds, the IED has
memory for 623 recordings.
Table. 5.6.3. - 214. Disturbance recorder setting table is presented below.
Name
Range
Step
Default
Description
Recorder
enabled
0:Disabled
1:Enabled
-
1:Enabled
Enables/Disabled recorder function.
Recorder
status
0:Recorder
ready;
1:Recording
triggered;
2:Recording
and storing;
3:Storing
recording;
4:Recorder
full;
5:Wrong
con g
-
0:Recorder
ready
Indicates the status of recorder.
Manual
Trigger
0:-
1:Trig
-
0:Disabled
Trig the disturbance recorder manually.
Clear all
records
0:-
1:Clear
-
0:Disabled
Clears all disturbance recordings.
Clear
newest
record
0:-
1:Clear
-
0:Mega
Clears the latest of stored recordings.
Clear
oldest
record
0:-
1:Clear
-
-
Clears the oldest stored recording.
Max
amount of
recordings
0…2
32
-1
1
-
Maximum amount of recordings possible to store in the memory of IED.
Max length
of
recording
0…1800 s
0.001 -
Maximum settable length of a single recording,
Recordings
in memory
0…2
32
-1
1
0
How many recordings stored in the memory of IED.
AQ-T257
Instruction manual
Version: 2.00
© Arcteq Relays Ltd
268