Alarm Leds; Alarm Led 1-8 - ABB REX 521 Operator's Manual

REX 521
3.5.
3.5.1.
26
Protection Relay
Operator's Manual
Steady LED: TRIP
Blinking LED: TRIP (CBFP)

Alarm LEDs

Alarm LED 1-8

Non-active LED: OFF
Steady LED
Blinking LED
a. Valid only if the LED is not activated by the parameter Alarm LED States.
b. The alarm can also be OFF if an auxiliary supply break has occurred. The state of the LED is then
preserved and has to be acknowledged (cleared) from the main view.
A protection function has tripped and an indication
message is displayed. The trip indication is latching,
that is, it must be reset by pressing the
the serial communication.
If several protection functions trip within a short time,
the indication of the first tripping remains on the display
until the time determined by the "new trip indication"
setting value has expired. After this, a new trip
indication overwrites the old one.
This setting value can be set to indefinite (999); in this
case, the first trip indication remains on the display until
reset.
Trip with CBFP (circuit-breaker failure protection).
The indication is reset by pressing the
Normal operation. All the alarms are OFF.
Non-latched mode: alarm is still ON.
Latched mode: alarm is still ON or it is OFF but has not
a
been acknowledged.
Latched blinking mode: alarm is still ON but has been
ab
acknowledged.
Latched blinking mode: alarm is ON and has not been
b
acknowledged.
1MRS 751107-MUM
[C]
button or via
[C]
button.
ab