ABB Relion SMU615, Technical Manual, Page: 224 / 272

The states of manual triggering and periodic triggering are not included in the
recording, but they create a state change to the
Periodic triggering and Manual
triggering status parameters, which in turn create events.
The
TRIGGERED
output can be used to control the indication LEDs of the merging
unit. The
TRIGGERED
output is TRUE due to the triggering of the disturbance
recorder, until all the data for the corresponding recording has been recorded.
The IP number of the merging unit and the content of the
Bay name
parameter are both included in the COMTRADE configuration file for
identification purposes.
7.2.4 Application
The disturbance recorder is used for post-fault analysis and for verifying the correct
operation of merging units and circuit breakers. It can record both analog and
binary signal information. The analog inputs are recorded as instantaneous values
and converted to primary peak value units when the merging unit converts the
recordings to the COMTRADE format.
COMTRADE is the general standard format used in storing disturbance
recordings.
The binary channels are sampled once per task execution of the disturbance
recorder. The task execution interval for the disturbance recorder is the same as
for the protection functions. During the COMTRADE conversion, the digital status
values are repeated so that the sampling frequencies of the analog and binary
channels correspond to each other. This is required by the COMTRADE standard.
The disturbance recorder follows the 1999 version of the COMTRADE
standard and uses the binary data file format.
7.2.5 Settings
7.2.5.1 RDRE settings
Table 250: RDRE Non-group general settings
Parameter Values
(Range) Unit Step Default Description
Operation 1=on
5=off
1 1=on Disturbance
recorder
on/off
Record length 10...500 fundamental
cycles 1 50 Size of the re-
cording in
fundamental
cycles
Table continues on the next page
Measurement functions 1MRS758407 C
224 SMU615
Technical Manual