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Section E-1 Section E-1
IDEALARC DC-655
Theory of Operation .............................................................................................................Section E
General Description ....................................................................................................................E-2
Input Line Voltage, Contactor, Reconnect,
Fault Protection, Main and Control Transformers.......................................................................E-2
Control Board, Firing Board, Snubber/Fan
Board and Rectification ..............................................................................................................E-3
Protective Devices and Shutdown Circuits ................................................................................E-4
Thermal Protection ...............................................................................................................E-4
Over Current Protection .......................................................................................................E-4
Peak Current Protection.......................................................................................................E-4
Remote Control Fault Protection..........................................................................................E-4
Shorted Output Rectifier Fault Protection............................................................................E-4
SCR Operation............................................................................................................................E-5
TABLE OF CONTENTS
-THEORY OF OPERATION SECTION-
