4 cable connections, 5 welding power selection and electrodes – Kemppi Minarc 220 User Manual

Page 8

Minarc 220:

This equipment complies with IEC 61000-3-12 provided that the short-circuit

power S

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

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

inar

y / 1117