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NOTE: This diagram is for reference only. It may not be totally applicable to every code covered by this manual.
G-3
ELECTRICAL DIAGRAMS
SQUARE WAVE TIG 355
Machine Schematic
SHUNT (+)
SHUNT (-)
BACKGROUND RECTIFIER (+)
PRIMARY THERMOSTAT
PRIMARY THERMOSTAT
BACKGROUND RECTIFIER (-)
BACKGROUND RESISTOR
SCR1 GATE
SCR2 GATE
SCR3 GATE
SCR4 GATE
B.G. TRANS.
MAIN RECT. AC
MAIN RECT. AC
MAIN RECT. +
218
B.G. TRANSISTOR
MAIN RECTIFIER (-)
SCR2 GATE
SCR3 GATE
MAIN RECTIFIER AC
B.G. TRANSISTOR
SCR1 GATE
218A
MAIN RECTIFIER (+)
217A
MAIN RECTIFIER AC
214A
BACKGROUND RECTIFIER (-)
115V
INTERLOCK
242
INTERLOCK
222
SHUNT (+)
221
SHUNT (-)
TRIAC 115V
CHASSIS
PRIMARY
THERMOSTAT
BACKGROUND
RECTIFIER
+
-
Q1
BACKGROUND TRANSISTOR
SCR4
SCR1
SCR3
SCR2
MAIN
RECTIFIER
D1
150
/400
D2
10/
400
R3
8/ 100
223
OUTPUT
INDUCTOR
L3
AC
DC
DC
DC
DC
DC
DC
AC
AC
AC
++
-
-
207
202
201
203
A
B
C
D
E
F
U
N
R
B
W
RECEPTACLE
R5
REMOTE
CURRENT
CONTROL
REMOTE
ARC START
SWITCH
10K
R1
R2
C1
4/
220
25/
25
50/ 100
POLARITY
SWITCH
S1
SHUNT
400A/50mV
ELECTRODE
WORK
15/ 220
C6
R6
150/
100
T3
L4
L5
SPARK
GAP
R4
3/
25
C3
T4
SV1
SV2
GAS
SOLENOID
SOLENOID
WATER
0.5 A
F1
F2
1.5 A
CB1
115V/15A
FAN
FAN
X3
X4
250
SEE NOTE A
MAIN
TRANSFORMER
RECONNECT
PANEL
CR1
CR1
X5
X6
X2
X1
H1
H2
H3
H4
L2
L1
RECONNECT
PANEL
PILOT
TRANSFORMER
H1
X1 X2
H4
H3H2
T1
241
242
POWER START/
STOP PUSHBUTTON
START
STOP
S2
CR1
INTERLOCK
PL1
SECONDARY
THERMOSTAT
CR1
T5
NO
CONNECTION
}
POWER
FACTOR
CORR.
T2
TRANSFORMER
VOLTAGE
HIGH
ELECTRICAL SYMBOLS PER E1537
FOLLOWS, DEPENDING ON THE HIGHEST NAMEPLATE INPUT VOLTAGE:
HIGHEST NAMEPLATE
INPUT VOLTAGE:
440 THRU 460
480 AND HIGHER
AND
400 AND LOWER
LEAD #250 CONNECTS TO "HIGH" TERMINAL ON
FROM MAIN TRANSFORMER (T1)
LEAD #250 CONNECTS TO H5 LEAD OF
MAIN TRANSFORMER
RECONNECT PANEL, ALONG WITH CORRECT LEAD
NOTE A: LEAD #250 FROM POWER FACTOR CAPACITORS CONNECTS AS
TS701
219
214
220
215A
216A
234
233
115V
SCR4 GATE
G4
G1
G2
G3
+
-
C8
C7
CW-DENOTES CLOCKWISE POSITION WHEN VIEWED FROM FRONT OF POTENTIOMETERS.
*
-DENOTES ACTIVE LOW LOGIC SIGNAL
COMPONENT VALUES:
CAPACITORS = MFD/VOLTS
RESISTORS = OHMS/WATTS
DIODES = AMPS/VOLTS
*
*
*
START
*
PEAK
*
BACKGROUND
*
CRATER FILL
*
(OPTIONAL)
R
CW
115V HF
ALL LOGIC IS 15V UNLESS OTHERWISE SPECIFIED.
LEAD COLOR CODING
CONNECTOR PIN NUMBERS:
VIEW OF CONNECTOR ON PC BOARD
1 2 2 3 8
916
LATCH
EXAMPLE: THIS PIN IN
CONNECTOR J102
IS "6J102"
OPTIONAL REMOTE AMPTROL
AND ARC START SWITCH
TM
B=BLACK
N=BROWN
R=RED
U=BLUE
W=WHITE
Y=YELLOW
1
225
4P602
5P602
EP602
DP602
6P602
CP602
3P602
4J701
5J701
EJ701
DJ701
1J701
6J701
CJ701
3J701
(+)15 V
GAS & WATER
HIGH FREQ.
ARC ESTAB.
START
PEAK
BACKGROUND
CRATER FILL
*
*
*
*
*
*
1P602
HIGH FREQ.
ARC ESTAB.
(+)15 V
REMOTE
REMOTE
LOCAL
SPOT
OFF
ON
MODE
DISPLAY
START CURRENT
S10
S15
S14 S18
S13
METER
DISPLAY
START
CURRENT
VOLTS
AMPS
ON
OFF
HIGH
FREQ.
S12
OFF
START
CONTINUOUS
PULSE
S16
OFF
ON
S17
CRATER
FILL
(+)5 V
COMMON
CLOCK
DATA
*
*
CONTROL TRANSFORMER
AC RELAY
DC RELAY
115 V TO HIGH FREQ
115 V TO VALVE(S)
INTERLOCK
INTERLOCK
CURRENT
CW
R14
START
START
CURRENT
PEAK
STICK
ARC
FORCE
AC
WAVE
BALANCE
AFTER
FLOW
TIME
PREFLOW
TIME
SPOT
TIME
TIME
PULSE
FREQ.
BACKGROUND
% PEAK
CURRENT
PULSE
% ON
CRATER
FADE OUT
CRATER
% PEAK
CURRENT
G1
G2
G3
G4
216
217
100/25
+
-
*u
CR2
CR3
AC OCV BOOST
DC OCV BOOST
CLOSED
IN DC
S1A
229
241
CR2
CR3
RECTIFIER
OCV BOOST
UNREG. TO (+) 5 V REGULATOR ON CONTROL BOARD
UNREG. TO COMMON ON CONTROL BOARD
(+) 15 V
(-) 15 V
PWR SUPPLY GND. TO CONTROL BRD. COMMON
AC SYNC
GAS (& WATER) VALVE CONTROL
HIGH FREQ. CONTROL
INTERLOCK CONTROL (OVER VOLTAGE SHUTDOWN)
PENETRATION SCR CONTROL
CLEANING SCR CONTROL
SCR GROUND (TO GND ON POWER BRD)
BACKGROUND COMMAND
BACKGROUND GROUND
DC OCV BOOST RELAY (CR3) CONTROL
AC OCV BOOST RELAY (CR2) CONTROL
*
*
*
*
*
*
CW CWCW
CW CW CW CW CW CW CW CW CW
DC MODE
REMOTE
ARC START
SENSE
ELECTRODE
1J13
2J13
3J13
4J13
5J13
6J13
8J13
9J13
10J13
1J14
2J14
3J14
4J14
5J14
6J14
7J14
4J2 1 2J1 G4
1J2 2J1 G1
3J2 9J1 G3
6J2 11J1 216
8J2 3J1 218
9J2
10J2
14J1 212
1J5
2J5
1J4 Y
3J5
2J4 Y
4J5
5J5
6J5
7J5
10J4
5J4 W
4J4 U
6J4 U
12J4 R
4J1 210
5J1 214
1J1 217
2J2 13J1 G2
1J8 222
2J8 221
448 8J20
447 7J20
446 6J20
5J21 445 5J20
4J21 444 4J20
3J21 443 3J20
2J21 442 2J20
1J21 441 1J20
1J12 301
3J12 303
2J12 302
4J12 304
301 2J7
302 4J7
304 3J7
303 1J7
8J11 408
10J11 410
9J11 409
7J11 407
6J11 406
5J11 405
4J11 404
3J11 403
2J11 402
1J11 401
5J12 305
6J12 306
7J12 307
8J12 308
9J12 309
10J12 310
11J12 311
12J12 312
306 7J601
305 8J601
307 6J601
308 5J601
309 1J601
310 2J601
312 3J601
311 4J601
X7
2J10 2J19
1J10 1J19
11J10 11J19
12J10 12J19
9J10 9J19
8J10 8J19
7J10 7J19
6J10 6J19
5J10 5J19
4J10 4J19
3J10 3J19
15J10 15J19
10J10 10J19
14J10 14J19
13J10 13J19
R10
R11
R12
R13
R16
R15
R17
R18
R19
R20
R21
R22
ON
OFF
5J2 7J1 264
215
232
R8
8/300
R7
115 VAC TO TRIAC CIRCUITS
24 VAC
REMOTE
TIG
STICK
S11
12J11 412
115V GAS
( & WATER )
CONTROL
115V
.0025/10KV
5J23
115 VAC
REMOTE ARC START 24 VAC
ELECTRODE SENSE
REMOTE POT HI
REMOTE POT WIPER
REMOTE POT LO
DC MODE 24 VAC
ELECTRODE SENSE
REMOTE ARC START (TRIGGER) SWITCH 24 VAC
REMOTE CURRENT CONTROL HI
REMOTE CURRENT CONTROL WIPER
REMOTE CURRENT CONTROL LO
DC MODE SWITCH S1A 24 VAC
B
B
24 VAC OUT 24 VAC COMMON
7J23
8J23
4J22
1J22
2J22
3J22
6J22
2J23
3J23
4J23
204C
HIGH FREQ.
TRANSFORMER
L2
RF CHOKERF CHOKE
L1
L6
8J1 211
6J1 213
BRIDGE TOROID
L8
204
.22/400V
.22/400V
POT HI
POT WIPER
POT LO
24 VAC OUT
2J16
5J16
6J16
7J16
8J16
1J9 B
2J9
3J9
5J9
6J9
7J9
8J9
270
5J3 267
6J3 268
1J6 269
1J3 270
3J3 271
4J3 272
2J3 273
B 1J16
3J16
6J17 255
6J18
4J18
8J18
7J18
1J18
5J18
3J17
2J17
4J17
1J17
CR2
CR3
115 VAC
RECEPTACLE
C9 C10
3KV
.0047/
258
257
259 263
261
262
7J17 256
232
10J17
228
5J17
9J17
8J17
265 6J15
266 7J15
267 5J15
268 4J15
269 1J15
10J1
271 2J15
272 9J15
273 8J15
2522
5-14-93F
MACHINE SCHEMATIC
JJJ
NONE
2522
4-2-92
G2113
THE LINCOLN ELECTRIC CO.
CLEVELAND, OHIO U.S.A.
EQUIP.
TYPE
SCALE
DR DATE CHK
REF.
SUBJECT
SUP'S'D'G
SHT.
NO.
G
G
11J11 411
13J11 413
14J11 414
S19
4 STEP
2 STEP
2 STEP/4 STEP
2J24
1J24
AUTO
BALANCE
LED
SQUARE WAVE TIG 355
THERMOSTAT
TOROID
SHUNT TOROID
G-3
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