Connections - ESAB LAF 1251 Instruction Manual

4 INSTALLATION
4.2

Connections

• On delivery the welding power source is connected
for 400 V.
• For other supply voltage:
Remove the left side plate.
Perform the switchings on the main and control
transformer in accordance with the connection
instruction in "CONNECTION INSTRUCTION"
chapter.
• 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
below in "Mains connection" section).
• Remove the front plates (× 2).
•
Connect the ground cable to the screw marked
• Tighten the cable clamp (1).
• Connect the mains cables to the main connection terminals L1, L2 and L3 (5).
• 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.
• Connect the 1-pin measuring cable (4) for measuring the arc voltage to the return
cable/welding head.
• Connect a suitable welding and return cable in the connectors (3) marked + and - on
the front of the welding power source.
• 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) 171
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. For other regions, supply cables must be suitable for the
application and meet local and national regulations.
0449 505 101
380 400 / 415 500
104 99
3×35 + 25 3×35 + 25 3×25 + 16 3×35 + 25 3×25 + 16
120 100
50 Hz
230 400 / 415 500
99
3×70 + 35 3×35 + 25 3×25 + 16 3×70 + 35 3×35 + 25 3×25 + 16
160 100
- 11 -
.
50 Hz
80
80
230
80 171
80 160
60 Hz
440 550
99 80
100 80
60 Hz
400 / 440 550
99 80
100 80
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