Telwin Force 168 MPGE [4/84] Instruction manual
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Telwin Force 168 MPGE [4/84] Instruction manual

Telwin Force 168 MPGE [4/84] Instruction manual
forbidden access to the area in which welding machines are in
_______________(GB)_____________
operation.
This welding machine conforms to technical product standards
for exclusive use in an industrial environment for professional
INSTRUCTION MANUAL
purposes. It does not assure compliance with the basic limits
relative to human exposure to electromagnetic fields in the
domestic environment.
WARNING! BEFORE USING THE WELDING MACHINE READ THE
The operator must adopt the following procedures in order to
INSTRUCTION MANUAL CAREFULLY.
reduce exposure to electromagnetic fields:
- Fasten the two welding cables as close together as possible.
ARC WELDING MACHINES FOR COATED ELECTRODES (MMA)
- Keep head and trunk as far away as possible from the welding
FOR INDUSTRIAL AND PROFESSIONAL USE.
circuit.
Note: In the following text the term “welding machine" will be used.
- Never wind welding cables around the body.
- Avoid welding with the body within the welding circuit. Keep
both cables on the same side of the body.
1. GENERAL SAFETY CONSIDERATIONS FOR ARC WELDING
- Connect the welding current return cable to the piece being
The operator should be properly trained to use the welding
welded, as close as possible to the welding joint.
machine safely and should be informed about the risks related to
- Do not weld while close to, sitting on or leaning against the
arc welding procedures, the associated protection measures
welding machine (keep at least 50 cm away from it).
and emergency procedures.
- Do not leave objects in ferromagnetic material in proximity of
(Refer also to the “IEC TECHNICAL SPECIFICATION or CLC/TS
the welding circuit.
62081”: INSTALLATION AND USE OF EQUIPMENT FOR ARC
- Minimum distance d= 20 cm (Fig. I).
WELDING).
- Class A equipment:
- Avoid direct contact with the welding circuit: the no-load
This welding machine conforms to technical product standards
voltage supplied by the welding machine can be dangerous
for exclusive use in an industrial environment and for
under certain circumstances.
professional purposes. It does not assure compliance with
- When the welding cables are being connected or checks and
electromagnetic compatibility in domestic dwellings and in
repairs are carried out the welding machine should be
premises directly connected to a low-voltage power supply
switched off and disconnected from the power supply outlet.
system feeding buildings for domestic use.
- Switch off the welding machine and disconnect it from the
power supply outlet before replacing consumable torch
parts.
EXTRA PRECAUTIONS
- Make the electrical connections and installation according to
- WELDING OPERATIONS:
the safety rules and legislation in force.
- In environments with increased risk of electric shock
- The welding machine should be connected only and
- In confined spaces
exclusively to a power source with the neutral lead connected
- In the presence of flammable or explosive materials
to earth.
MUST BE evaluated in advance by an “Expert supervisor” and
- Make sure that the power supply plug is correctly connected
must always be carried out in the presence of other people
to the earth protection outlet.
trained to intervene in emergencies.
- Do not use the welding machine in damp or wet places and do
Technical protection measures MUST BE taken as described
not weld in the rain.
in 5.10; A.7; A.9. of the “IEC TECHNICAL SPECIFICATION or
- Do not use cables with worn insulation or loose connections.
CLC/TS 62081”.
- The operator MUST NOT BE ALLOWED to weld in raised
positions unless safety platforms are used.
- VOLTAGE BETWEEN ELECTRODE HOLDERS OR TORCHES:
- Do not weld on containers or piping that contains or has
working with more than one welding machine on a single
contained flammable liquid or gaseous products.
piece or on pieces that are connected electrically may
- Do not operate on materials cleaned with chlorinated
generate a dangerous accumulation of no-load voltage
solvents or near such substances.
between two different electrode holders or torches, the value
- Do not weld on containers under pressure.
of which may reach double the allowed limit.
- Remove all flammable materials (e.g. wood, paper, rags etc.)
An expert coordinator must use measuring instruments to
from the working area.
determine the existence of a risk and should take suitable
- Provide adequate ventilation or facilities for the removal of
protection measures as detailed in 5.9 of the “IEC TECHNICAL
welding fumes near the arc; a systematic approach is needed
SPECIFICATION or CLC/TS 62081”.
in evaluating the exposure limits for the welding fumes, which
will depend on their composition, concentration and the
length of exposure itself.
RESIDUAL RISKS
- Keep the gas bottle (if used) away from heat sources,
- IMPROPER USE: it is hazardous to use the welding machine
including direct sunlight.
for any work other than that for which it was designed (e.g. de-
icing mains water pipes).
2. INTRODUCTION AND GENERAL DESCRIPTION
This welding machine is a power source for arc welding, made
- Use adequate electrical insulation with regard to the
specifically for direct current (DC) .
electrode, the work piece and any (accessible) earthed metal
The specific characteristics of this regulation system (INVERTER), i.e.
parts in the vicinity.
high speed and precise regulation, mean the welding machine gives
This is normally achieved by wearing gloves, shoes, head
excellent results when welding both with coated electrodes (rutile,
coverings and clothing designed for this purpose and by
acid, basic).
using insulating platforms or mats.
Regulation with the “inverter” system at the input of the power supply
- Always protect your eyes using masks or helmets with special
line (primary) means there is a drastic reduction in the volume of both
actinic glass.
the transformer and the levelling reactance. This allows the
Use special fire-resistant protective clothing and do not allow
construction of a welding machine with extremely reduced weight and
the skin to be exposed to the ultraviolet and infrared rays
volume, enhancing its advantages of easy handling and
produced by the arc; other people in the vicinity of the arc
transportation.
should be protected by shields of non-reflecting curtains.
OPTIONAL ACCESSORIES:
- MMA welding Kit.
3. TECHNICAL DATA
DATA PLATE
The most important data regarding use and performance of the
- The flow of the welding current generates electromagnetic
welding machine are summarised on the rating plate and have the
fields (EMF) around the welding circuit.
following meaning:
Electromagnetic fields can interfere with certain medical
Fig. A
equipment (e.g. Pace-makers, respiratory equipment, metallic
1- Protection rating of the covering.
prostheses etc.).
2- Symbol for power supply line:
Adequate protective measures must be adopted for persons with
1~: single phase alternating voltage;
these types of medical apparatus. For example, they must be
3~: three phase alternating voltage.
- 4 -

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