ABB OMD100 - No Line Priority

8
AUTOMATIC CONTROL UNIT, OMD100
Figure 3.2 Automatic Switching Sequence, no line priority
Ts: Switching delay, Tbs:Back switching delay
3.1.2 No line priority
The switching sequence can be summarized in following steps:
An anomaly occurs on the Line 1
Switching delay
Change-over switch (Switch I) to the position O
Change-over switch (Switch II) to the position II
And the back switching sequence can be summarized in the following steps:
The Line 1 will start the normal functioning
Change-over switch stays in position II
An anomaly occurs on the Line 2
Back switching delay
Change-over switch (Switch II) to the position O
Change-over switch (Switch I) to the position I
LINE 1
LINE 2
Switch I status
A07251
Switch II status
Ts
Tbs