CIRCUIT DIAGRAM
MIG/NBC 300GN
USER MANUAL
16
YF-20Y A1
CT2
CT1
3
2
1
4
5
6
Main transformer
Output -
Output reactor
1
2
X2
AC36V
Heated board
Diffuser
300A/75mV
Input
28:4+4
Gas cylinder heating up
Port
Port
AC380V
AC380V
AC380V
1
2
3
4
5
6
Air switch
PCON1
PCON2
PCON3
PCON5
PCON4
Reactor
1
3
CON1
PCON6
PCON8
CP1
CP2
J1
1
2
4
5
X1
1
2
3
Brachium capacitance
Current transformer
Commutate board
Top board
1
2
3
4
5
CON6
1
2
4
5
CON10
1
2
4
3
25*15*12
1
3
CON1
1
3
CON13
1
3
CON3
A
-
+
Wire feeder
1
2
CON14
1
2
CON7
Electromagnetism valve
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
CON2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
CON1
控制板
Front panel
1
2
3
CON16
1
2
CON5
1
2
CON11
1
2
Manual switch
1
2
Thermoswitch
1
2
Wire inspecting
14.4A
14.4A
14.4A
20A
20A
300A
300A
RN008-03A
1
2
4
5
X1
Fan
DC540V
PCON7
200A/400V
200A/400V
200A/400V
200A/400V
472/3KV*2
472/3KV*2
472/3KV*2
15R/10W
472/3KV*2
15R/10W
15R/10W
15R/10W
1
2
3
4
5
CON2
EMC board
8A
FUSE