ABB Relion 670 Series Technical Reference Manual page 73

1MRK505222-UUS C
Technical reference manual
From
disturbance
length control
OR
per LED
set to
sequence 6
ANSI01000237 V1 EN
Figure 14: Activation of new disturbance
In order not to have a lock-up of the indications in the case of a persisting signal each
LED is provided with a timer, tMax, after which time the influence on the definition of
a disturbance of that specific LED is inhibited. This functionality is shown i diagram in
figure 15.
Activating signal
ANSI05000507 V1 EN
Figure 15: Length control of activating signals
Timing diagram for sequence 6
Figure 16 shows the timing diagram for two indications within one disturbance.
OR
tRestart
0
AND
0-100s
AND
OR
To LED
To disturbance
AND
length control
0-tMax
0
en05000507_ansi.vsd
Section 3
Local HMI
New
disturbance
OR
AND
en01000237_ansi.vsd
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