ABB Relion 670 series, Technical Reference Manual

Page: 73 / 1232

New
disturbance
From
disturbance
length control
per LED
set to
sequence 6
en01000237_ansi.vsd
AND
OR
AND
OR
OR
0
0-100s
tRestart
AND
OR
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
AND
To disturbance
length control
To LED
en05000507_ansi.vsd
0-tMax
0
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.
1MRK505222-UUS C
Section 3
Local HMI
67
Technical reference manual