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WELD WINDING, REACTOR AND
RANGE SWITCH
The stator weld winding is connected to the reactor
and range switch. The inductance in the reactor offers
an impedance to current flow. The reactor coil is
tapped at various points. As the range switch is rotat-
ed, different amounts of reactor coil are brought into
the current path. As more turns of reactor are brought
into the circuit, the more impedance there is to current
flow. Simply stated, the more reactor in the circuit, the
lower the welding current.
If a constant voltage is desired for wire feeding, then
the reactor is bypassed, and the range switch is con-
nected to one of four taps on the stator weld winding
to provide a lower but “stiffer” output voltage.
THEORY OF OPERATION
E-4 E-4
RANGER 300 D AND 300 DLX
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FIGURE E-4
WELD WINDING, REACTOR AND RANGE SWITCH
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
RANGE
SWITCH
REACTOR
STATOR
ROTOR
MECHANICAL
ROTATION
ENGINE
GLOW PLUGS
BATTERY
6 PIN
AMPHENOL
14 PIN
AMPHENOL
OUTPUT
CONTROL
REMOTE
SWITCH
BY-PASS
BOARD
SHUTDOWN
SOLENOID
STARTER
MOTOR
ALTERNATOR
IDLER
SOLENOID
PRINTED
CIRCUIT
BOARD
FIELD
CAPACITOR
FIELD
BRIDGE
115 & 230VAC
RECEPTACLES
AC
AC
OUTPUT
RECTIFIER
BRIDGE
CAPACITORS
PART OF
RANGE
SWITCH
CHOKE
POLARITY
SWITCH
WORK
TERMINAL
ELECTRODE
TERMINAL
CONTACTOR CLOSURE
ROTOR
SLIP
RINGS
42VAC
115VAC
cv
output
contactor
CONTACTOR CLOSURE
OIL &
WATER
SENSORS
RANGER 300 DLX