Lincoln Electric IM481-B Welding System User Manual


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POWER RECTIFIER BRIDGE
DIAGRAM 1
PLUG TO SNUBBER BOARD
SHUNT
P5
221222
223
204
220
204
204
204
2
20
D1D2D3
SCR1SCR2SCR3
G1G2G3
D4
ANODE
CATHODE
ANODE
CATHODE
P3
Gate leads
plug to Control
P.C. board
To T1 main
transformer
To plug
P1
To (+) side
of capacitor
bank
_
+
X
1
X
2
X
3
GATE
_
+
POWER RECTIFIER BRIDGE
DIAGRAM 1
PLUG TO SNUBBER BOARD
SHUNT
P5
221 222
223
204
220
204
204
204
2
20
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 (+) side
of capacitor
bank
_
+
X
1
X
2
X
3
GATE
_
+
– 29 –
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