ABB REO 517 Applications Manual page 333


Disturbance recorder
Some parameters in the header of a recording are stored with the recording, and some
are retrieved from the parameter database in connection with a disturbance. This means
that if a parameter that is retrieved from the parameter database was changed between
the time of recording and retrieval, the collected information is not correct in all parts.
For this reason, all recordings should be transferred to the Station Monitoring System
(SMS) workstation and then deleted in the terminal before any such parameters are
changed.
'HVLJQ
The recordings can be divided into two parts, the header and the data part. The data part
contains the numerical values of recorded analog and binary channels. The header con-
tains clearly written basic information about the disturbance. A part of this information
is also used by REVAL to reproduce the analog and binary signals in a correct and user-
friendly way. Such information is primary and secondary instrument transformer rat-
ings.
7DEOH  'LVWXUEDQFH KHDGHU
3DUDPHWHU
*HQHUDO
Station, object and ID
Date and time
Sequence number
CT earthing
Time synchronization source
Collection window parameters
tPre, tPost, tLim
Prefault phase-to-phase voltage
and current RMS values
Trig signal and test flag
$QDORJ VLJQDOV
Signal name
Primary and secondary instrument
transformer rating
Undertrig: level and operation
Overtrig: level and operation
3DUDPHWHU GDWD 6WRUHG ZLWK GLVWXU
EDVH DQFH
x
x
x
x
x
x
x
x
x
x
x
x
&KDSWHU 
0RQLWRULQJ
323