Viewing Events - ABB REF 542plus Operator's Manual

1MRS755869
10.
Multifunction Protection and Switchgear Control Unit
Operator's manual

Viewing events

REF 542plus records the last 30 protection events (start, trips, block and other). This
internal memory is managed as a circular buffer, for example the 31st event
overwrites the 1st oldest one. In case of a power loss, events are kept because they
are stored in the non-volatile memory.
For each event, the following information is recorded: involved protection function,
event type, relevant measurement (current, voltage, frequency), date and time (up to
milliseconds). Events are displayed using the full screen; the single line diagram is
thus not visible.
Fig. 10.-1 Events display
To display the protection events, select the Start/Trip menu with the navigation
buttons. Use UP and DOWN to browse through the events.
REF 542plus REF 542plus
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