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4.2
Connections
S
On delivery the welding power source is connected
for 400 V.
S
For other supply voltage:
Remove the left side plate.
Perform the switchings on the main and control
transformer in accordance with the connection
instruction on page 16.
S
Select the mains cable with the correct cable area
and fuse the cable with the correct fuse in accordance
with local regulations (see the table on page 8).
S
Remove the front plates (x 2).
S
Connect the ground cable to the screw marked
S
Tighten the cable clamp (1).
S
Connect the mains cables to the main connection terminals L1, L2 and L3 (5).
S
Connect the control cable between the welding power source and the control
box to the 28-pin connector (2) on the inside of the welding power source.
S
Connect the 1-pin measuring cable (4) for measuring the arc voltage to the
return cable/welding head.
S
Connect a suitable welding and return cable in the connectors (3) marked + and
- on the front of the welding power source.
S
Fit the side/front plates.
Mains connection
LAF 1251
Voltage (V)
Phase current I
(A)
1eff
2)
Cable area (mm
Fuse, slow (A)
LAF 1251M
Voltage (V)
Phase current I
(A)
1eff
2)
Cable area (mm
Fuse, slow (A)
Note:
The mains cable areas and fuse sizes as shown above are in accordance with Swedish regulations.
They may not be applicable in other countries: make sure
that the cable area and fuse sizes comply with the relevant national regulations.
bb05de
50 Hz
400 / 415
500
99
80
3x35+ 25
3x25+ 16
100
80
50 Hz
230
400 / 415
171
99
3x70+ 35
3x35+ 25
160
100
- 8 -
.
400 / 440
99
3 x35+ 25
100
500
230
80
171
3x25+ 16
3x70+ 35
80
160
60 Hz
550
80
3x25+ 16
80
60 Hz
400 / 440
550
99
80
3 x35+ 25
3x25+ 16
100
80
© ESAB AB 2011
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