Eaton Electrical RTC-50 Appendix a Operational Flowchart, Utility is powering the load

Instructional Booklet

Instruction Manual for the Eaton RTC-50 Automatic Transfer Switch Controller

Effective: June 2007 Page 9

APPENDIX A: OPERATIONAL FLOWCHART

Utility is available

ATS connects to Utility

(Utility Close Output closes)

Utility is powering the load

Is Utility

N

Is Utility	Y
available?
N

Is Generator	N
available?
Y
TDNE timer times out
(20 sec or 50 sec)

available yet?

Y

TDEN timer times out (10 sec)

Transfer to Utility

(Utility Close Output closes)

Utility is powering the load

Generator shuts down

Transfer to Generator

(Gen Close Output closes)

Generator is powering the load

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