ABB TruONE ATS, Installation And Operating Instruction

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26 Tru O N E® AT S , I N S TA LL ATI O N A N D O PER ATI N G I N S TR U C TI O N
1
Source 2 priority (no generator)
Switch position I
Switch position O
Switch position II
Source 1 OK
Source 2 OK
Pre-transfer signal
Load shed signal
Override momentary S1 outage delay
Transfer from S1 to S2 delay
Override momentary S2 outage delay
Transfer from S2 to S1 delay
Center-off delay, I - O - II
Pre-transfer S1 to S2 delay
Post-transfer S1 to S2 delay
Pre-transfer S2 to S1 delay
Post-transfer S2 to S1 delay
Load shed delay
Note: The functionality and sequence of ‘Elevator pre- and post-signals’ is equivalent to ‘Pre- and Post-transfer’ features.
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Table 2.4 Automatic Switching Sequences, Source 2 Priority (No generator)