Kemppi KMS 400 AS - Manual (Page 9)

EN
2.5 Connection to the mains supply
FastMig power sources are delivered as standard with 5 meters of mains power cable. No
mains plug is fitted at the Kemppi factory.
NOTE! If local country based regulations state an alternative power cable is required, the mains
cable must be replaced in conformity with the regulations. Connection and installation of the
mains cable and plug, should only be carried out by a suitably qualified person.
Remove the machine cover plate to enable mounting of a mains cable. FastMig Pulse power
sources can be connected to the mains supply of 400 V 3~ .
If changing the mains cable take into consideration the following:
The cable is entered into the machine through the inlet ring on the rear panel of the machine
and fastened with a cable clamp. The phase conductors of the cable are coupled to connectors
L1, L2 and L3. The earth protection coloured green-yellow is coupled to the marked connector
. If you are using 5-lead cable, do not connect the neutral conductor.
Sizes of the mains cables and fuse ratings for the machine at 100 % duty cycle are specified in
the table below:
Rated voltage Mains voltage range Fuses, slow-blow Connection cable *) mm²
KMS 300 400 V 3~ 360 V – 440 V 20 A 4 x 6.0 S
KMS 400 400 V 3~ 360 V – 440 V 25 A 4 x 6.0 S
KMS 500 400 V 3~ 360 V – 440 V 35 A 4 x 6.0 S
*) In cables of S type there is a protective grounding conductor coloured green-yellow.
2.6 Welding and earth cables
Recommended copper cables with cross-sectional area are as follows:
FastMig KMS 400 AS
70 – 90 mm²
In enclosed table are shown typical load capacities of rubber insulated copper cables, when
ambient temperature is 25 °C and lead temperature is 85 °C.
Cable Duty cycle ED Voltage loss / 10 m
100 % 60 % 30 %
50 mm² 285 A 370 A 520 A 0,35 V / 100 A
70 mm² 355 A 460 A 650 A 0,25 V / 100 A
95 mm² 430 A 560 A 790 A 0,18 V / 100 A
Do not overload welding cables due to voltage losses and heating.
Fasten the earth clamp of the return current cable carefully, preferably direct onto the piece to
be welded. The contact surface of the earth clamp should always be as large as possible.
Clean the fastening surface from paint and rust.
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© Kemppi Oy / 1515