1MRK 505 350-UEN Section 3
System Settings
Technical Manual 29
Distributed busbar protection REB500
Setting the response to “Block” is more likely to cause a failure to trip and to
“Continue in operation” a mal-operation.
3.5.3 Isolator alarm delay
The busbar protection has a common alarm circuit and timer for monitoring the
operation of all the isolators and bus-tie breakers. The setting of the isolator
operating time thus applies for all the isolators and circuit-breakers in the system.
The time delay must be set longer than the slowest isolator operating time.
3.5.4 Remote trip impulse width
BBP and, where configured, BFP and EFP can send an intertripping signal to a
remote station via PLC or optical fiber communication channel:
• 21115_REMOTE TRIP
• 23110_BFP REMOTE TRIP
• 24105_EFP REMOTE TRIP
The impulse width generally has to be limited, typically to 200 ms.
Table 26 Setting range of the remote trip impulse width
Parameter Min. Max. Default Step Unit
Remote trip impulse width
3.6 Event memory
The busbar protection includes an event memory for each individual unit (central
unit and bay units) in which changes in the statuses of binary signal are recorded.
The event memories have a capacity for 100 events in bay units and 1000 events in
the central unit. The user can select one of the storage strategies in Table 27.
A time stamp (date and time with an accuracy of 1 ms), a text defined using the
operator program and a status (set or reset) are attached to every event. Individual
texts can be entered for each status.
Generally, one event is configured for every input and output, but events can also
be assigned to optocoupler inputs or relay outputs.
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