ABB REL 501-C1 2.5, Technical Reference Manual

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Disturbance report (DRP) Chapter 11
Monitoring
1 Disturbance report (DRP)
1.1 Application
Use the disturbance report to provide the network operator with proper information about dis-
turbances in the primary network. The function comprises several subfunctions enabling differ-
ent types of users to access relevant information in a structured way.
Select appropriate binary signals to trigger the red HMI LED to indicate trips or other important
alerts.
1.2 Functionality
The disturbance report collects data from each subsystem for up to ten disturbances. The data is
stored in nonvolatile memory, used as a cyclic buffer, always storing the latest occurring distur-
bances. Data is collected during an adjustable time frame, the collection window. This window
allows for data collection before, during and after the fault.
The collection is started by a trigger. Any binary input signal or function block output signal can
be used as a trigger. The analog signals can also be set to trigger the data collection. Both over
levels and under levels are available. The trigger is common for all subsystems, hence it acti-
vates them all simultaneously.
A triggered report cycle is indicated by the yellow HMI LED, which will be lit. Binary signals
may also be used to activate the red HMI LED for additional alerting of fault conditions. A dis-
turbance report summary can be viewed on the local HMI.
Disturbance overview is a summary of all the stored disturbances. The overview is available
only on a front-connected PC or via the Station Monitoring System (SMS). The overview con-
tains:
• Disturbance index
• Date and time
• Trip signals
• Trig signal that activated the recording
• Distance to fault (requires Fault locator)
• Fault loop selected by the Fault locator (requires Fault locator)