TP-6126 8/0228 Section 4 Operation
Time delay standby-to-preferred
Transfer to OFF position
(programmed-transition only)
Transfer to normal (preferred) source
Time delay off-to-preferred
(programmed-transition only)
Time delay engine cooldown (TDEC)
(as programmed*)
Engine start signal removed
Pre-transfer load control (as programmed*)
Post-transfer load control (as programmed*)
* See the Setup Program Operation Manual.
Normal (preferred) power source returns
In-phase monitor (open-transition only,
as programmed*)
Figure 4 -2 ATS Sequence of Operation, Return to
Normal (preferred source)
LED Indicators
Loss of Normal Source
N
Available
N
Position
OFF
Position
E
Available
E
Position
Load
Control
Engine Start Time Delay
Preferred-to-Standby Time Delay X X
Post-transfer to Standby Load Control X X X
Standby-to-Preferred Time Delay X X X
Pre-transfer to Preferred Load Control X X X X
Off-to-Preferred Time Delay (programmed-transition
only)
X X X
Post-transfer to Preferred Load Control X X X X
Engine Cooldown Time Delay (Default = 0) X X X
Figure 4 -3 User Interface LED Indicators During Loss of Normal Source