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A3 MIG Welder© Kemppi Oy 2018 1826
INTEGRATION GUIDE
3.3 Power source
Place the machine on a sturdy, level surface that is dry and will not allow dust or other
impurities to enter the machine´s cooling air ow. Preferably, situate the machine in a
suitable carriage unit so that it is above oor level.
The surface inclination may not exceed 15 degrees.
Ensure the free circulation of cooling air. There must be at least 20 cm of free
space in front of and behind the machine for cooling-air circulation.
Protect the machine against heavy rain and direct sunshine.
Do not operate the machine in the rain.
Never aim the spray of sparks from a grinding machine toward the equipment.
Distribution network
All regular electrical devices without special circuits generate harmonic currents into
distribution network. High rates of harmonic current may cause losses and disturbance
to some equipment.
This equipment complies with IEC 61000-3-12 provided that the short-circuit power Ssc
is greater than or equal to 4.7 MVA at the interface point between the users supply and
the public supply network. It is the responsibility of the installer or user of the equipment
to ensure, by consultation with the distribution network operator if necessary, that the
equipment is connected only to a supply with a short-circuit power Ssc greater than or
equal to 4.7 MVA.
Connecting the power source to the electric network
The A3 Power Source is connected to a 400-V three-phase network. The fuse size for 100%
load in a 400-V three-phase network with 4 x 6-mm² cable is 35 A delayed.
The machine is equipped with a ve-meter mains cable that comes without a plug. Before
use, check the mains cable and install a mains plug. If the cable does not comply with the
local electrical regulations, replace it with a compliant cable.
The mains cable or plug may be installed or replaced by only an electrical contractor or
installer authorised to perform such operations.
The power plug
The power source comes without a plug for connection to the electrical grid. Attach a
plug suitable for your power-supply standard to the power cable. Check the connections,
attach the plug to a socket, and switch the electrical power on from the welding power
source to verify that the machine works properly.
Switch the machine o and unplug it from the power socket before continuing to
further steps in the hardware installation.
If local or national regulations specify that an alternative power cable is required, the
cable must be replaced in conformity with the regulations. Connection and installation of the
power cable and plug should be carried out only by a suitably qualied person.
If changing the power cable, take the following facts into consideration:
The cable enters the machine through the inlet ring on the rear panel and is
fastened in place with a cable clamp (05). The cover plate of the power source
must be removed to access the electrical cable connector.
The phase conductors of the cable are coupled to connectors L1, L2, and L3.
The protective ground line, colored green and yellow, is coupled to the marked
connector.
If you are using ve-lead cable, do not connect the neutral conductor.
05
*
L3
L2
L1
* In S-type cables there is a protective grounding conductor, green-and-yellow striped.
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