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2.4
WELDING AND EARTHING CABLES
The device has a welding cable connection both in the front and in the rear. The positions of
the welding and earthing cable connections are shown earlier in section 'Introduction' .
The welding cable type to be used is rubber-insulated copper cable. The recommended cross-
surfaces of the cables are as follows:
Model
KM 400
The table below shows the typical load capacities of the cables when the ambient
temperature is 25° C and the lead temperature is 85° C.
Cable
50 mm²
70 mm²
95 mm²
120 mm²
Do not overload the welding cables, as an overload may cause voltage loss and
NOTE!
overheating.
Connect the earth clamp directly to the work piece in such a way as to maximise the contact
surface of the clamp. The point of connection must be unpainted and free of corrosion.
3.
MACHINE USE
3.1
STARTING OF THE POWER SOURCE
Start the power source by turning the main switch (S11) on the front panel to the 'I' position.
The standby indicator (H11) turns on. The control panel and wire feeder are not operational
yet, and the text 'OFF' is shown on the control panel display.
Always turn the device on and off using the main switch, not via the mains socket.
NOTE!
The cooling fan is started for a moment when the main switch is turned to the 'I' position. The
fan turns off after a while and then restarts during welding when the machine has warmed up
sufficiently. The fan continues running even after up to 10 minutes of welding, depending on
the temperature of the machine.
3.2
FRONT PANEL INDICATORS
The following indicators can be found on the front panel of the device:
• When the green indicator, H11, is on, the power source is in standby mode. This indicator
is on when the machine is connected to the mains supply with the main switch in the 'I'
position.
• When the yellow overheating indicator (H12) is on, the machine has overheated. The fan
then starts. When the indicator turns off, the machine can be used again.
• When indicator H12 blinks, the machine has experienced a failure. Attempt to remedy
the problem according to the instructions in Section 4, 'Troubleshooting' . If the failure
cannot be eliminated, turn off the machine, and turn it on again. If the failure persists,
EN
write down any fault code that may be shown on the display and contact authorised
Kemppi service agent.
6
Cross-surface
70 ... 90 mm²
Duty cycle (ED)
100 %
60 %
35 %
285 A
316 A
371 A
355 A
403 A
482 A
430 A
498 A
606 A
500 A
587 A
721 A
Voltage loss / 10 m
20 %
458 A
0,35 V / 100 A
602 A
0,25 V / 100 A
765 A
0,18 V / 100 A
917 A
0,21 V / 100 A
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