Lincoln TCV400, Operator'S Manual, Page: 16 / 31

B-5
OPERATION
B-5
TCV400
OPERATIONAL FEATURES & CONTROLS
INPUT CONTACTOR
The power source is equipped with an input contactor.
INPUT CONNECTIONS
The three input lines are brought in through the rear
panel of the power source and attached to the input
contactor. Removal of the removable access panel
makes the contactor accessible for the input cable con-
nections.
INPUT LINE VOLTAGE COMPENSATION
The power source is equipped with input line voltage
compensation as standard. For a line voltage fluctua-
tion of ±10% the output will remain essentially constant.
This is accomplished through the feedback network in
the control circuit.
SOLID STATE OUTPUT CONTROL
The output of the welder is electronically controlled by
SCRʼs instead of mechanical contactors, providing extra
long life for highly repetitive welding applications.
SOLID STATE CONTROL SYSTEM
The Control PC Board is located behind the control
panel which hinges down for easy access to the
board. The Snubber Printed Circuit Board is mounted
on the back of the Front Panel.
MACHINE COOLING
The fan pulls air in through the louvered front of the
machine over the internal parts and exhausts out the
louvered rear of the machine. The fan motor is fully
enclosed, has sealed ball bearings, requires no lubri-
cation, and operates when the power switch is turned
on.
CASE FEATURES
The machine uses a 32” (813mm) long base. The low
profile case facilitates installation of the machine
under a workbench and stacking the machines three
high to conserve floor space.
FIGURE B.2
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