Lincoln Electric R3R-300, R3R-500 service manual -

G-3
ELECTRICAL DIAGRAMS
R3R
Wiring Diagram-R3R-300
ELECTRICAL SYMBOLS PER E1537
LEGEND
D5 D6 D7 POCKET AMPTROL SENSING BRIDGE L1 DC OUTPUT FILTER R1 R2 R3 R4
15
14
13 4
5
6
7
8
9
TO SUPPLY LINES
TO GROUND
PER
NATIONAL
ELECTRICAL
CODE
1 2 3
L1
L2
L3
H3
H2
H1
X2 X1 T2
RECONNECT PANEL SHOWN CONNECTED FOR LOW VOLTAGE
4
5
6
7
8
9
1
2
3H3
H2
H1
X2 X1 T2
TO GROUND
PER
NATIONAL
ELECTRICAL
CODE
L1
L2
L3
TO SUPPLY LINES
TO GROUND
PER
NATIONAL
ELECTRICAL
CODE
H3
H2
H1
X2 X1
T2
TO SUPPLY LINES
TO GROUND
PER
NATIONAL
ELECTRICAL
CODE
231
H3
H2
H1
X2 X1 T2
TO SUPPLY LINES
ICR
TO PRIMARY COILS PRIMARY CONNECTIONS 4-7, 6-9, AND 5-8 MAIN TRANSFORMER .
1
2
3
L1
L2 L3
DIAL SELECTOR SWITCH
SCR1-D1 SCR2-D2 SCR3-D3 D4
SCR AND DIODE RECTIFIER BRIDGE
T1 T2 T3
MAIN TRANSFORMER CONTROL TRANSFORMER POCKET AMPTROL OPTION
TRANSFORMER
( DASHED ITEMS ON WIRING
DIAGRAM ARE OPTIONAL )
CAVITY NUMBERING SEQUENCE (COMPONENT SIDE OF BOARD)
CONNECTOR AND THESE THREE LEADS ARE NOT USED WHEN OPTIONAL POCKET AMPTROL IS PROVIDED
ABCDEF
10K OHM POT., OUTPUT CONTROL 10K OHM POT., ARC FORCE CONTROL 40 OHM
SW1 SW2 SW3 SW4
POWER SWITCH MACHINE/REMOTE SWITCH
L1
D4
D1 D2 D3
SCR1 SCR2 SCR3
R3
204
204
204
205
206
SHUNT
218
R4
D5
D6
D7
219
219
201 202
203
204
204 209 208 217
CONTROL
P.C.
BOARD
SW1
PILOT LIGHT
231
235
235
232
W
THESE LEADS ARE PRESENT ONLY WITH OPTIONAL METER KIT.
204 224
220 225
115V
G G Y
T3
G
OPTIONAL POCKET AMPTROL P.C. BOARD
77 76
75
75
217 206
205
75 210 211
R1
SW2
R2
204 208 209
224
OPTIONAL METER KIT
VM AM
++
--
FRAME GROUND
-
+
217
217
RECTIFIER BRIDGE
115 V
201 202 203
13 14 15
789
SSS
10 11 12
123 456
66V
AUXILIARY COILS
BOTTOM PRIMARY TOP PRIMARY
T1 X1 X2 X3
SEC SEC SEC
13, 14, & 15 ARE PRESENT
ON 380/500 OR 460/575 MACHINES ONLY.
THERE IS NO 10-11-12
CONNECTION ON 380
OR TRIPLE VOLTAGE
MACHINES.
A
CHOKE
THERMOSTAT
SECONDARY
THERMOSTAT
233
231
204
1 2 3
L1
L2 L3
11
10
12
3
2
1
9
8
7
6
5
4
RECONNECT PANEL SHOWN CONNECTED FOR 380V .
TO PRIMARY COILS
H4
234 235
FAN MOTOR
221 222 223
G1G2 G3
204
+
-
G1G2 G3 204
226
220
204
211
210
213
77
212 76
(SWITCH SHOWN
IN LOCAL POSITION)
A = AMBER G = GREEN W = WHITE Y = YELLOW
COLORS
235
232
ARE MADE AT THE
SINGLE, 346V AND ABOVE
(EXCEPT 380V.)
380V OR TRIPLE
VOLTAGE
SINGLE, BELOW 346V OR
DUAL VOLTAGE
380/500 OR 460/575
V
66V 66V
76
77
SW4
OPTIONAL POLARITY SWITCH (60 Hz ONLY)
FLEX LEAD JUMPER
RECONNECT PANEL SHOWN
CONNECTED FOR LOW VOLTAGE
1 2 3 4 1 2 3 4 5 6
77 76 75 G Y 218 219
J6 J7
1 2 3 4 5 6 7 8
75 213 212
201A
203A
J2
J4
201A
203A
J3
6 3 2 1 5
1
8
5
6
7
4 3 2
1
5
6
4
3 2
1 2
4
3
1
2
J1
SWITCH CRI
HOLD
INUP
PICK
NC
233A 232A
232
ICR
SWITCH CRI
HOLD
INUP
PICK
NC
233A 232A 232
TO PRIMARY COILS
231
ICR
SWITCH CRI
HOLD
INUP
PICK
NC
233A 232A
232
231
ICR
SWITCH CRI
HOLD
INUP
PICK
NC 232A
232
233A
_
+
8434
3-8-91N 7-12-91A 3-6-92C
WIRING DIAGRAM
ALB
NONE
8434
2-6-91 L8069
t
UNLESS OTHERWISE SPECIFIED TOLERANCE
ON HOLE SIZES PER E2056
ON 2 PLACE DECIMALS IS .02
WITH PUBLISHED STANDARDS.
ON 3 PLACE DECIMALS IS .002
ON ALL ANGLES IS .5 OF A DEGREE
MATERIAL TOLERANCE (" ") TO AGREE
THE LINCOLN ELECTRIC CO.
CLEVELAND, OHIO U.S.A.
EQUIP.
TYPE
SCALE SUBJECT
DR DATE CHK REF. SUPÕSÕDÕG
SHT.
NO.
THE LINCOLN ELECTRIC CO.
THIS SHEET CONTAINS PROPRIETARY INFORMATION
OWNED BY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED
THE LINCOLN ELECTRIC CO.
L
L
WITHOUT THE EXPRESS PERMISSION OF
TO PRIMARY COILS
.4 OHM POCKET AMPTROL SENSING RESISTOR
J5
12345678
226
SNUBBER BOARD
4
21341
2
REMOTE CONTROL RECEPTACLE
ICR INPUT STARTER
HIGH TEMP
LIGHT
D8
TP1
D8 TP1 TRANSIENT PROTECTOR
INPUT CONTACTOR BRIDGE
IDEALARC R3R 300, R3R 375-I
235
G-3
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NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The wiring diagram specific to your code is pasted inside one of the enclosure panels of your machine.