Introduction And General Description; Technical Data; Installation Site; Power Connection - Telwin MASTERMIG 270/2 Manual De Instrucciones

- Do not use the machine to defrost the piping
- Place the machine on a level surface to prevent
overturning.

INTRODUCTION AND GENERAL DESCRIPTION

This compact machine is used for arc welding (from now on
called WELDER) and has been designed specifically for the
MAG welding of carbon steel and low-alloy steel with either
C0 or Argon/C0 mixture shielding gas using solid .
2 2
This welder is also suitable for the MIG welding of stainless
steel using Argon gas + 1-2% oxygen and of aluminium with
Argon gas using electrode wires suited to the piece to be
welded.
The welder is fitted with a flat power transformer complete
with damping inductor and Graetz bridge rectifier.
In addition a direct current permanent magnet gear-motor is
installed in an accessible opening in the welder. This gear-
motor can take reels of up to 15 Kg.
The welder also has a torch and a return cable complete
with earth clamp.
The welder includes a wheel kit.
Power is adjusted by means of a rotary switch ; the wire
speed is controlled using the knob on the front panel.
A thermostat is fitted which protects the welder from
overheating caused by malfunctions or particularly heavy
use.
TECHNICAL DAT A
Technical data relative to the performance of the machine
may be found on a plate (back panel) with the following
symbols, whose meaning is explained below.
1- EUROPEAN Norm of reference, for safety and
construction of arc welding machines.
2- Symbol for internal machine structure: inverter
transformer -rectifier.
3- Symbol of planned welding procedure: welding with
continuous flow of welding wire.
4- Symbol for power supply line: 3ph alternating voltage.
5- Protection rating of casing: IP21 or IP22: it is protected
against solid foreign bodies of diam. 12.5mm (e.g.
fingers) and against drops of water falling vertically
(IP21) or with an inclination to the vertical of up to 15°
(IP22).
6 - Performance of welding circuit:
- U : maximum peak no-load voltage (welding circuit
0
open).
- I /U : current and corresponding normalised voltage
2 2
[U2 = (14+0,05 I ) V] that the machine can deliver
2
during welding.
- X: Duty cycle: indicates the time for which the machine
can deliver the corresponding current (same column).
Expressed in %,on the basis of a 10min cycle (e.g. 60%
= 6 minutes work, 4 minutes wait; and so on).
- A/V-A/V: Indicates the welding current adjustment
range (minimum - maximum) at the corresponding arc
voltage.
7- Technical specifications for power supply line:
- U : Alternating voltage and power supply frequency of
1
machine (limit allowed ±15%):
- I : Maximum current consumed by the line.
1max
- I : maximum effective current consumed
1eff
8- : Value of delayed action fuses to be used to
protect the power line.
- Symbols referring to safety standards
9- Manufacturer's serial number. Machine identification
(indispensable for technical assistance, requesting
spare parts, discovering product origin).
10- Symbol S: indicates that welding operations may be
Fig. A
Fig. B
carried out in environments with heightened risk of
electric shock (e.g. very close to large metallic
volumes).
Note: The plate example given shows the meaning
of the symbols and figures; the exact rating values
for the machine in your possession should be read
directly on the rating plate of the machine it self.
EARTH OF WELDING MACHINE (Table 1)
WARNING: none of the welding machines described in this
manual is equipped with a lifting device.
INSTALLATION
SITE
Locate the machine in an area where openings for cooling
air are not obstructed (forced circulation with fan); check that
conductive dusts, corrosive vapours, humidity etc., will not
enter machine.

POWER CONNECTION

Connection to the mains should be carried out using the
cable supplied.
The machines operate using single-phase or three-phase
power (check data plate).
The machine should be set up so that the voltage on the
plate corresponds to the mains voltage. Correct connection
is obtained by removing the side panel of the generator and
connecting the jumpers to the relevant terminal block
following the diagrams provided, (only for the three-phase
version) the single-phase version is already connected.
(Fig.C).
PLUG: CONNECT TO THE MAINS CABLE A
STANDARDIZED PLUG OF ADEQUATE CAPACITY (2P +
T, 3P+T) AND SET A MAINS SOCKET EQUIPPED WITH
FUSES OR AN AUTO MA TIC SWITCH.THE CORRECT
TERMINAL IS TO BE CONNECTED TO THE GROUND
CONDUCTOR (YELLOW-GREEN) OF THE MAINS
VOLTAGE SUPPLY (TAB.1).
WARNING
Failure to observe the above rules will make ineffective
the safety system installed by the manufacturer (Class
1) with resulting risks for persons (eg. electric shock)
and objects (eg. fires).
REPLACING THE POWER SUPPLY CABLE
THIS OPERATION MUST BE CARRIED OUT BY
SKILLED PERSONNEL!
OPTIONALS
- Electronic control box for pulse-welding
In addition to the adjustments and controls of the
standard electronic board, this board allows pulse-
welding. The welding and interval times can be set by two
timers which can be adjusted by means of two knobs
which are marked with appropriate symbols.
- Accessory for aluminium welding
Teflon wire guide hose for torch Ø 1-1.2 mm.
Roller for aluminium Ø 1.0-1.2 mm.
Contact tips for aluminium Ø 1.0 mm.
Contact tip for aluminium Ø 1.2. mm
- Metal-sheet plating equipment
made up of the following pieces:
electrode-holding pincer, electrode-holder for torch ,
copper-plated coal electrode .
- Riveting equipment
made up of:
special nozzle with rivet position and one packet of rivets.
Gas cylinder attachment
In order to achieve safe transportation, only one small or
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