ABB REB650, Technical Manual

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12.8 Disturbance recorder
12.8.1 Functionality
The Disturbance recorder function supplies fast, complete and reliable information
about disturbances in the power system. It facilitates understanding system behavior
and related primary and secondary equipment during and after a disturbance. Recorded
information is used for different purposes in the short perspective (for example
corrective actions) and long perspective (for example functional analysis).
The Disturbance recorder acquires sampled data from selected analog- and binary
signals connected to the Disturbance report function (maximum 40 analog and 96
binary signals). The binary signals available are the same as for the event recorder
function.
The function is characterized by great flexibility and is not dependent on the operation
of protection functions. It can record disturbances not detected by protection functions.
Up to three seconds of data before the trigger instant can be saved in the disturbance file.
The disturbance recorder information for up to 100 disturbances are saved in the IED
and the local HMI is used to view the list of recordings.
12.8.2 Function block
The Disturbance recorder has no function block of it’s own.
12.8.3 Signals
See Disturbance report for input and output signals.
12.8.4 Settings
See Disturbance report for settings.
12.8.5 Operation principle
Disturbance recording is based on the acquisition of binary and analog signals. The
binary signals can be either true binary input signals or internal logical signals
generated by the functions in the IED. The analog signals to be recorded are input
channels from the Transformer Input Module (TRM) through the Signal Matrix Analog
Input (SMAI) and possible summation (Sum3Ph) function blocks and some internally
derived analog signals.
Section 12
1MRK 505 277-UUS C
Monitoring
288
Technical Manual