ABB RED650 Technical Manual page 85

1MRK 505 394-UEN A
Line differential protection RED650 2.2 IEC
Technical manual
If an indication with higher priority appears after acknowledgment of a lower
priority indication the high priority indication will be shown as not acknowledged
according to figure 20.
Activating
signal GREEN
Activating
signal YELLOW
Activating
signal RED
LED
Acknow.
IEC09000315 V1 EN-US
Figure 20: Operating sequence 3, three colors involved, alternative 2
Sequence 4 (LatchedAck-S-F)
This sequence has the same functionality as sequence 3, but steady and flashing
light have been alternated.
Sequence 5 LatchedColl-S
This sequence has a latched function and works in collecting mode. At the
activation of the input signal, the indication will light up with a steady light. The
difference to sequence 3 and 4 is that indications that are still activated will not be
affected by the reset that is, immediately after the positive edge of the reset has
been executed a new reading and storing of active signals is performed. Every LED
is independent of the other LEDs in its operation.
Activating
signal
LED
Reset
IEC01000235 V2 EN-US
Figure 21: Operating Sequence 5 LatchedColl-S
That means if an indication with higher priority has reset while an indication with
lower priority still is active at the time of reset, the LED will change color
according to figure22.
Local Human-Machine-Interface LHMI
G R
G R
Section 5
Y
IEC09000315-1-en.vsd
SEMOD56072-64 v1
SEMOD56072-67 v4
IEC01000235_2_en.vsd
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