TP-6745 7/1060 Section 3 Controller Test and Replacement
Load control contacts close
Post-transfer load control *
Emergency breaker closes
Generator set engine start contacts close
Transfer time delay preferred-to-standby and
pretransfer load control time delays *
Utility breaker opens.
Transfer time delay standby-to-preferred
and pretransfer load control *
Load control contacts close
Post-transfer load control time delays *
Load control contacts open
Test started
Time delay engine cooldown (TDEC)
(default = 0)
Generator set engine start contacts open
Off-to-preferred time delay
Test ended
Load control contacts open
Off-to-standby time delay
Emergency breaker or switch opens
Utility breaker closes
* Load control sequences operate if programmed. See the Transfer Switch Operation and Installation Manual.
Figure 3-14 Test with Load Sequence
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