System Operation
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IPN 997-00012-03 B2 Issue B2 July 2018
79
Single line diagram
1.
AC utility supply
2.
Generator
3.
AC change-over
switch
4.
Rectifiers
5.
Generator control
panel
6.
Normally open (NO)
relay contacts on I/O
board interrupt
Generator Run
signal.
Typical operation for systems with an ac supply
AC Supply
Battery Discharge
Generator Run
Generator Fuel
Savings
1.
AC supply failure. Battery starts to discharge.
2.
AC supply restored. Battery begins to recharge. Battery discharge did not reach the Ah Threshold. The
Generator Control output was not active (relay contacts did not close) so the generator did not run.
3.
AC supply failure. Battery starts to discharge.
4.
Battery discharge reaches the Ah Threshold. The Generator Control output becomes active and the
relay contacts close. The Generator Run circuit is completed allowing the generator to start. Battery
begins to recharge.
5.
Battery recharge is complete. The Generator Control output becomes inactive and the relay contacts
open. The Generator Run circuit is interrupted causing the generator to stop. Battery begins to
discharge.
6.
AC supply restored. Battery begins to recharge. Battery discharge did not reach the Ah Threshold. The
Generator Control output was not active (relay contacts did not close) so the generator did not run.
