ABB REF542plus User Manual

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9. Viewing events
REF542plus 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. 9.-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.
1MRS755869
Multifunction Protection and Switchgear Control
Unit
Operator's manual
REF542plus

ABB REF542plus Specifications

General

Brand	ABB
Model	REF542plus
Category	Control Unit
Language	English