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INPUT LINE VOLTAGE AND MAIN
TRANSFORMER
The desired single-phase input power is connect-
ed to the Pro-Cut 60 through a line switch located
on the front panel of the machine.
A reconnect panel allows the user to configure the
machine for the desired input voltage. This AC
input voltage is applied to the primary of the main
transformer. This main transformer changes the
input voltage and current to the voltage and cur-
rent levels necessary for plasma cutting. In addi-
tion, the main transformer also has several
isolated auxiliary windings (115vac, 24vac and
12vac). The 115vac winding supplies power for
the cooling fan and powers the air solenoid , the
CR2 relay and the high voltage transformer via
the control board. One 24vac winding produces
supply power for the control board. The other
24vac winding is applied to the control board and
is used in the Pro-Cut 60 torch safety and trigger
network. The 12vac winding is required to oper-
ate the power board.
THEORY OF OPERATION
FIGURE E.2. - Input Line Voltage and Main Transformer
PRO-CUT 60
E-1
NOTE: Unshaded areas of Block Logic
Diagram are the subject of discussion