Eaton SC200 - Page 74

SC200 Handbook
66
Copyright © 2007-2011 Eaton Corporation. All Rights Reserved.
IPN 997-00012-50H November 2011
Single line diagram

AC utility supply

Generator

AC change-over switch

Rectifiers

Generator control panel

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

AC supply failure. Battery starts to discharge.

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.

AC supply failure. Battery starts to discharge.

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.

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.

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.