Event Recording; Fault Recorder - ABB REF 542plus Technical Reference Manual

1MRS755859
4.5.
4.6.
Multifunction Protection and Switchbay Control
Unit
Technical Reference Manual
It is also possible to implement interlocking between the switchgear connected to
the same busbar system. This requires the availability of status information of the
switching devices to and from other switchgear. The status information must be
provided by:
Conventional, hard-wired ring bus system
*
Using the ABB station automation system with ABB LON protocol per LAG
*
1.4, which allows horizontal communication among the REF 542plus units
connected on the interbay bus
Using the CAN Open digital fieldbus (only to be applied by the ABB switchgear
*
companies)
The REF 542plus foresees different control modes, selectable with the control key.
In local mode, the HMI control buttons are used to operate on the primary objects.
Remote operations are inhibited. In remote control mode, only switching actions
from a remote control device like a station automation system are permitted. Local
control from the HMI is inhibited. All possibilities to operate on the primary objects
can be inhibited by setting the unit to the no control mode.

Event recording

The last 30 recorded events can be shown locally on the HMI. Most of the events
are related to protection activities. In addition to displaying the event name,
additional information about the event, time, date and the RMS value of the short-
circuit current switched off by the CB are provided. Each event is stamped with the
time and the date. Events are stored in non-volatile memory, so they are maintained
also in case of a power loss.
Fig. 4.5.-1 Event list on the LCD of the HMI

Fault recorder

The REF 542plus unit is equipped with a powerful and flexible fault recorder
function. This function can be used to record at most eight analog input channels
and thirty-two binary signals. The analog input signals are recorded with a sampling
REF 542plus REF 542plus
A050403
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