EN
Minarc 220:
This equipment complies with IEC 61000-3-12 provided that the short-circuit
power S
sc
is greater than or equal to 1.6 MVA at the interface point between
the user's 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 S
sc
greater than or equal to
1.6 MVA.
2.4
CABLE CONNECTIONS
Connection to mains
Minarc 220 is delivered with a five-metre mains cable that does not have a plug.
NOTE!
Check the fuse size in Technical specifications. The plug may be installed
only by electrical contractors and installers authorised to perform such
operations.
If you use an extension power supply cord, its cross sectional area should
be at least as large as the supply voltage cable fitted to the machine. The
maximum length for the extension cable is 50 m.
Restrictions on generator type and power may apply in generator use. Fault-
free operation of the machine requires a sufficiently high-power generator.
The power recommendation is more than 15 kVA.
Earthing cable
Connect the earthing cable to the negative pole in MMA welding, and to the
positive pole in TIG welding.
Before you start welding, clean the work piece surface and fix the earth
return clamp to the work piece in order to create a closed and interference
free welding circuit.
Shielding gas
In TIG welding, shielding gas is used to prevent atmospheric contamination of
the molten weld pool and cooling weld. Normally, the shielding gas is argon
(Ar). Normally the gas flow rate is approximately 8–15 litres per minute, but this
can vary according to the welding current used and the size of gas nozzle.
2.5
WELDING POWER SELECTION AND ELECTRODES
MMA welding electrodes
In MMA welding, the welding electrodes must be connected to the correct
pole. Normally, the electrode holder is connected to the positive and the
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c 220 / © Kemppi O
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