ABB ret650, Technical Manual

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14.7.3 Signals
14.7.3.1 Input signals
The Event list logs the same binary input signals as configured for the Disturbance
report function.
14.7.4 Operation principle
When a binary signal, connected to the disturbance report function, changes status, the
event list function stores input name, status and time in the event list in chronological
order. The list can contain up to 1000 events from both internal logic signals and
binary input channels. If the list is full, the oldest event is overwritten when a new
event arrives.
The list can be configured to show oldest or newest events first with a setting on the
local HMI.
The event list function runs continuously, in contrast to the event recorder function,
which is only active during a disturbance.
The name of the binary signal that appears in the event recording is the user-defined
name assigned when the IED is configured. The same name is used in the disturbance
recorder function , indications and the event recorder function .
The event list is stored and managed separate from the disturbance report information .
14.7.5 Technical data
Table 383: DRPRDRE technical data
Function Value
Buffer capacity Maximum number of events in the list 1000
Resolution 1 ms
Accuracy Depending on time
synchronizing
14.8 Trip value recorder
14.8.1 Functionality
Information about the pre-fault and fault values for currents and voltages are vital for
the disturbance evaluation.
1MRK 504 135-UEN A
Section 14
Monitoring
477
Technical manual