Tweco 350 4R Wirefeeder - Manual (Page 22)

3-2 Manual 0-5182
weldskill 250, 350 installation
Installation
The WeldSkill 350 MIG Power Source is supplied with
a 15 Amp input lead and is designed for a 415 VAC
supply voltage.
The WeldSkill 350 MIG Power Source is suitable for
below Mains supply voltages:
Mains Supply
Voltage
Setting
Mains
Supply Lead
Size
Minimum
Mains
Current
Circuit Size
Machines Duty
Cycle
415V 1.5 mm 2 15 Amp 350A @ 30%
Table 3-2 WeldSkill 350 Supply Requirements
NOTE
Motor start fuses or thermal circuit break-
ers are recommended for this application.
Check local requirements for your situa-
tion in this regard.
!
WARNING
Extra precautions for Electromagnetic
Compatibility may be required when this
Welding Power Source is used in a do-
mestic situation.
3.05 Installation and Users
Responsibility
The user is responsible for installing and using the
welding equipment according to the manufacturer’s
instructions. If electromagnetic disturbances are
detected then it shall be the responsibility of the user
of the welding equipment to resolve the situation with
the technical assistance of the manufacturer. In some
cases this remedial action may be as simple as earth-
ing the welding circuit, see NOTE. In other cases it
could involve constructing an electromagnetic screen
enclosing the Welding Power Source and the work,
complete with associated input filters. In all cases,
electromagnetic disturbances shall be reduced to the
point where they are no longer troublesome.
NOTE
The welding circuit may or may not be
earthed for safety reasons. Changing the
earthing arrangements should only be au-
thorised by a person who is competent to
assess whether the changes will increase
the risk of injury, e.g. by allowing parallel
welding current return paths which may
damage the earth circuits of other equip-
ment. Further guidance is given in IEC
974-13 Arc Welding Equipment - Installa-
tion and use (under preparation).
3.06 Assessment of Area
Before installing welding equipment, the user shall
make an assessment of potential electromagnetic
problems in the surrounding area. The following shall
be taken into account:
1. Other supply cables, control cables, signalling
and telephone cables; above, below and adjacent
to the welding equipment.
2. Radio and television transmitters and receiv-
ers.
3. Computer and other control equipment.
4. Safety critical equipment, e.g. guarding of in-
dustrial equipment.
5. The health of people around, e.g. the use of
pacemakers and hearing aids.
6. Equipment used for calibration and measure-
ment.
7. The time of day that welding or other activities
are to be carried out.
8. The immunity of other equipment in the en-
vironment: the user shall ensure that other
equipment being used in the environment is
compatible: this may require additional protec-
tion measures.
The size of the surrounding area to be considered
will depend on the structure of the building and other
activities that are taking place. The surrounding area
may extend beyond the boundaries of the premises.
3.07 Methods of Reducing
Electromagnetic Emissions
A. Mains Supply
Welding equipment should be connected to the mains
supply according to the manufacturer’s recommen-
dations. If interference occurs, it may be necessary
to take additional precautions such as filtering of
the mains supply. Consideration should be given to
shielding the supply cable of permanently installed
welding equipment in metallic conduit or equivalent.
Shielding should be electrically continuous through-
out it’s length. The shielding should be connected
to the Welding Power Source so that good electrical
contact is maintained between the conduit and the
Welding Power Source enclosure.