Kohler KEP User Manual

TP-6745 7/1050 Section 3 Controller Test and Replacement
3.4.2 Preferred Source Loss and Return
Following is an explanation of the sequence of operation
when Preferred Source failure is detected.
Preferred Source Fails:
1. Load control contacts open.
2. Engine start time delay expires.
3. Engine start contacts close, signaling the
generator set to start.
4. The generator starts and the standby source
becomes available.
Note: If the standby generator set does not start, a
fail to acquire fault is activated.
5. Transfer time delay preferred-to-standby expires.
6. Utility breaker opens.
7. Off-to-standby time delay expires.
8. Emergency breaker or switch closes.
9. Load control contacts close as post-transfer load
control time delays expire.
Preferred Source Returns:
1. Transfer time delay standby-to-preferred expires
and load control contacts open as pretransfer load
control time delays expire.
2. Emergency breaker or switch opens.
3. Off-to-preferred time delay expires.
4. Utility breaker closes.
5. Load control contacts close as post-transfer load
control time delays expire.
6. Engine cooldown time delay expires.
7. The engine start contacts open, signaling the
generator set to stop.
Note: The generator set may continue to run if the
generator set controller has a separate
engine cooldown cycle.

Kohler KEP Specifications

General

Brand	Kohler
Model	KEP
Category	Switch
Language	English