Section E-1 Section E-1
PRO-CUT 25
Theory of Operation .............................................................................................................Section E
General Description ....................................................................................................................E-2
Input Line Voltage and Auxiliary Transformer .............................................................................E-2
Precharge and Protection ...........................................................................................................E-3
Main Transformer ........................................................................................................................E-4
Output Section and Torch...........................................................................................................E-5
Control Board .............................................................................................................................E-6
Protection Circuits ......................................................................................................................E-7
Overload Protection..............................................................................................................E-7
Thermal Protection ...............................................................................................................E-7
Accidental Operation Protection.................................................................................................E-7
Safety Parts-In-Place Protection ................................................................................................E-7
Insulated Gate Bipolar Transistor (IGBT) Operation ...................................................................E-8
TABLE OF CONTENTS
-THEORY OF OPERATION SECTION-
FIGURE E.1 – PRO-CUT 25 BLOCK LOGIC DIAGRAM
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