Lincoln Electric SVM189-B Manual Do Utilizador
THEORY OF OPERATION
E-2
E-2
COMPACT WIRE WELDERS
GENERAL DESCRIPTION
The Compact Wire Welders that are covered by this
manual are Constant Voltage (CV) DC welders that
can be used for MIG or Flux-Core process . The 120
VAC machines are rated for 90 amps, 19.5 volts, at
20% duty cycle. The 208 / 230 VAC machines are
rated for 130 amps, 17 / 20 volts, at a 30% duty
cycle. All are equipped with a 4-pin trigger connec-
tor to allow operation of an optional spool gun for
Aluminum MIG Welding.
manual are Constant Voltage (CV) DC welders that
can be used for MIG or Flux-Core process . The 120
VAC machines are rated for 90 amps, 19.5 volts, at
20% duty cycle. The 208 / 230 VAC machines are
rated for 130 amps, 17 / 20 volts, at a 30% duty
cycle. All are equipped with a 4-pin trigger connec-
tor to allow operation of an optional spool gun for
Aluminum MIG Welding.
FIGURE E.2 — GENERAL DESCRIPTION
TRIGGER
RECEPTACLE
WIRE
SPEED
CONTROL
ARC
VOLTAGE
CONTROL
CONTROL
BOARD
GAS
SOLENOID
WIRE
FEED
FEED
MOTOR
LINE
SWITCH
CIRCUIT
BREAKER
INPUT
RECEPTACLE
FAN
MOTOR
MAIN
TRANSFORMER
MAIN
BRIDGE
CHOKE
+
+
-
OUTPUT
TERMINALS
VOLTAGE FEEDBACK &
MOTOR POWER
NOTE: Unshaded areas of Block Logic
Diagram are the subject of discussion