Recorder
trigger
Enable by
checking
the box
-
Unchecked Enable triggers by checking the boxes. Check “Digital recording channels”
–list for possible trigger inputs.
Recording
length
0.1…1800s 0.001 1.0 s
Measured energy per phase in kilo –or mega values.
Recording
mode
0:FIFO
1:KEEP
OLDS
-
0:FIFO
First in rst out replaces the oldest stored recording by the latest one if the
memory is full.
Keep olds won’t accept new recordings when the memory is full.
Analog
channel
samples
0:8 s/c
1:16 s/c
2:32 s/c
3:64 s/c
-
3:64s/c
Sample rate of the disturbance recorder. Samples are saved from the
measured wave according the setting.
Digital
channel
samples
Fixed 5ms
-
5ms
Fixed sample rate of the recorded digital channels.
Pre
triggering
time
0.1…15.0s
0.1 s
0.5s
Recording length before the triggering.
Analog
Recording
CH1…20
0…8 freely
selectable
channels
-
None
selected
Check available analog channels from the “Analogue recording channels” –
list for possible recorder inputs.
Auto. get
recordings
0:Disbaled
1:Enabled
-
0:Disbaled
Transfer recordings to relay FTP directory automatically to be fetched to
SCADA system via FTP client. Please note that when this is activated any
disturbance recordings made will be pushed to FTP. Up to 6 recordings can
be stored in FTP at once. Once the 6 recordings have been retrieved and
removed, more recordings will then be pushed to FTP.
Rec.Digital
Channels
0…32 freely
selectable
channels
-
None
selected
Check available digital channels from the “Digital recording channels” –list
for possible recorder inputs.
Notice that disturbance recorder is not ready unless the “Max length of recording” is showing some
value other than zero. At least one trigger input has to be selected to “Recorder Trigger” -menu to ful ll
this term.
Events
Disturbance recorder generates an event each time when it is triggered either manually or by using
dedicated signals. Event cannot be masked off.
Application example
This chapter presents an application example of setting and analyzing the disturbance recorder.
Con guration is done by using “AQtivate” –con guration and setting tool and “AQviewer” is used for
analyzing the recording. Registered users can download the latest tools from the company website
www.arcteq. .
In table “Disturbance recorder settings” the recorder is set as speci ed below.
1. Maximum amount of recordings and maximum length of recording is calculated according the
memory size and following settings: Recording length 1.0 second, Analog channel samples
32s/c, Analog recording channel 1,2,3,4,6,7 and 8 are used and Recorder digital channels is
taking samples of tracked system frequency every 5ms.
2. First overcurrent stage trip (I> TRIP) activation will trigger the recorder.
3. Length of the recording is 1.0 seconds. Pre-triggering time 20 percent affects to the recording
in a way that 200ms is recorded before “I> TRIP” and 800ms is recorder after.
4. Sample of each recorder analog signal is taken 64 times in a cycle. With 50Hz system
frequency it means that sample is taken every 312.5µs. Digital channels are tracked every 5
milliseconds.
AQ-F255
Instruction manual
Version: 2.00
© Arcteq Relays Ltd
278
