Lincoln Electric IM655 RED-D-ARC DC-400 - Manual (Page 37)

F-4 DIAGRAMS F-4
DC-400
POWER RECTIFIER BRIDGE
DIAGRAM 1
PLUG TO SNUBBER BOARD
SHUNT
P5
221 222
223
204
220
204
204
204
204
220
D1 D2 D3
SCR1 SCR2 SCR3
G1 G2 G3
D4
ANODE
CATHODE
ANODE
CATHODE
P3
Gate leads
plug to control
P.C. board
To T1 main
transformer
To plug
P1
To
mode
switch
To (+) side
of capacitor
bank
_
+
X
1
X
2
X
3
GATE
_
+