ABB TruONE ATS Installation And Operating Instruction page 24

24 Tr u O N E ® AT S , I N S TA L L AT I O N A N D O P E R AT I N G I N S T R U C T I O N
Source 1 priority (Source 2 = generator)
Switch position I
Switch position O
Switch position II
Source 1 OK
Source 2 OK
Generator started
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
Generator stop 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 2.3 Automatic Switching Sequences, Source 1 Priority (Source 2 = Generator)