Lincoln Electric R3R-500 User Manual
Section E-1
Section E-1
IDEALARC R3R
TABLE OF CONTENTS
- THEORY OF OPERATION SECTION -
Theory of Operation
.............................................................................................................
Section E
CONTROL BOARD
OUTPUT
CONTROL
ARC FORCE
CONTROL
CONTROL
TRANSFORMER
POWER
SWITCH
R
E
C
O
N
N
E
C
T
E
C
O
N
N
E
C
T
INPUT
CONTACTOR
TRANSFORMER
MAIN
SCR
DIODE
HYBRID BRIDGE
/
SHUNT
OUTPUT
CHOKE
NEGATIVE
OUTPUT
TERMINAL
POSITIVE
OUTPUT
TERMINAL
G
A
T
E
T
E
S
I
G
N
A
L
L
S
FEEDBACK
F
E
E
D
B
A
C
K
E
E
D
B
A
C
K
THERMOSTATS
FAN
MOTOR
TERMINAL
STRIP
REMOTE
SWITCH
DIAL
SELECTOR
SWITCH
SNUBBER
BOARD
AMPHENOL
POLARITY
SWITCH
OPTIONAL
OPTIONAL
POCKET
AMPTROL
PC BOARD
OPTIONAL
POCKET
AMPTROL
TRANSFORMER
FIGURE E.1 – IDEALARC R3R BLOCK LOGIC DIAGRAM