ABB REF 542plus User Manual

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10. 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.
A051344
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.
Multifunction Protection and Switchgear Control Unit
Operator's manual
REF 542plusREF 542plus
1MRS755869

ABB REF 542plus Specifications

General

Brand	ABB
Model	REF 542plus
Category	Control Unit
Language	English