Yellow Indicator Led - ABB REU 610 Operator's Manual

1MRS755770
4.3.1.2.
4.3.1.3.
Voltage Protection Relay
Operator's Manual

Yellow indicator LED

Fig. 4.3.1.2.-1 Yellow indicator LED
Indicator off:
*
No protection stage has started.
Lit indicator:
*
A protection stage has started or generated an alarm. The start and alarm
indication can be selected to be either latching or non-latching with the SGF
switches. A non-latching indication is automatically cleared when the fault has
disappeared and the protection stage has been reset, whereas a latching indication
remains lit until manually cleared.
Flashing indicator:
*
Starting protection stages have been blocked by an external digital input signal.
The blocking indication is non-latching, that is, it disappears with the digital
input signal.
The yellow indicator LED continues flashing for as long as a protection stage
remains blocked. The blocking indication disappears with the digital input signal or
when the protection stage is no longer starting.
If a protection stage is blocked when other protection stages are starting, the
indicator continues flashing. This is because a blocking indication has a higher
priority than a starting indication.
Red indicator LED
Fig. 4.3.1.3.-1 Red indicator LED
Indicator off:
*
No protection stage has tripped.
Lit indicator:
*
A protection stage has tripped. The trip indication is latching, that is, it remains
lit until manually cleared.
Flashing indicator:
*
CBFP has tripped. The indication is latching, that is, it remains flashing until
manually cleared.
REU 610 REU 610
A040266
A040265
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