41
U>> U12/U23
TRIP
A051581
Fig. 4.3.2.1.-2
Trip indication
Latching and non-latching indications
A latching operation indication message remains on the display until manually
cleared or until replaced by a message of higher priority. However, if the fault is
stable and has not disappeared, the operation indication message and the LED(s) are
not cleared. An operation indication generated by a non-latching start is
automatically cleared when the stage is reset.
Priority of operation indication messages
The messages on the display have a certain priority order. If different types of
indications are activated simultaneously, the message with the highest priority
appears on the display.
The priority order of the messages:
1. CBFP
2. Trip
3. Start/Alarm
When several protection stages generate starts, the last start indication message is
displayed. When several protection stages trip, the first trip indication message is
displayed until the time, as specified by the
NEW TRIP IND.
setting value, has
expired. After this, a new trip indication message can replace the old one. A hidden
trip indication message can be brought forward by pressing
.
4.3.2.2.
Disturbance recorder indication
When the display is in the idle mode, an asterisk
“
*
”
indicating that the disturbance
recorder has been triggered and is ready to be unloaded, is shown in the lower right-
hand corner of the display. Disturbance recorder status indication can also be routed
to the programmable LEDs.
4.3.2.3.
Self-supervision
There are two types of fault indications; internal relay fault (IRF) indications and
warnings. Internal relay faults prevent relay operation. Warnings are less severe
faults and continued relay operation with full or reduced functionality is allowed.
Voltage Protection Relay
Operator's Manual
REU 610
REU 610
1MRS755770
