Technical Data - Telwin 952577 Manual De Instrucciones

Furthermore this generator can be used for welding with stick
electrodes of diameters from 1.5-5mm both in DC or AC.
The welding current can be set with continuity from minimum
to maximum values (of 5-250 A), using a potentiometer or by
remote controls.
The generator is equipped with :
- electro fan for cooling live parts
- thermostatic protection against thermic overloads (yellow
led 'ON')
- H.F. generator with appropriate protection systems and
external control switch for:
a striking the arc in TIG/DC without electrode-piece contact
b striking and maintaining the arc in TIG/AC (syncronized
with arc voltage in order to avoid extinction of the arc
during the welding of light alloys)
- high noise immunity control module with external controls
with the following functions:
a mode selection :
- electrodes
- TIG torch pushbutton (2 strokes)
- TIG torch pushbutton ON-OFF/ON-OFF (4 strokes)
b HF mode selection :
- OFF
- HF striking (DC) with automatic cut off when arc
established
- automatic HF striking in AC
c gas electrovalve control with following functions :
- pre-gas with time regulation potentiometer
- post-gas with time regulation potentiometer
d thyristor ignition syncronized and setting of the welding
current (phase control); the following are accessible on
the machine :
- strike-up pre-current potentiometer
- main welding current potentiometer
- down-slope time potentiometer
- ''Balance'' potentiometer
- Mains cable with adequate load capacity
- Work cable with quick connection and collet
- TIG torch equipped with accessories, gas connection,
control pushbutton switch, and quick power connection (on
request with water cooling)
- Gas pressure gauge with flowmeter
- Quick clamp (loosened) to be connected to collet if
necessary.

TECHNICAL DATA

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 standard of reference for the safety and
construction of arc welding machines.
2- Symbol for the internal structure of the machine:
transformer -rectifier.
3- Symbol for expected welding procedure: Tig welding.
4- Symbol for the power supply line: single phase
alternating voltage.
5- Protection rating for the case: IP22. It is protected against
solid foreign bodies of a diameter of <24.5mm (e.g.
fingers) and against vertically falling water drops with an
inclination to the vertical of up to 30°.
6 - Performance of welding circuit:
- U : maximum peak no-load voltage (welding circuit
0
Fig. A
Fig. B
open).
- I /U : current and corresponding normalised voltage
2 2
[U2 = (10+0,05 I ) V] that the machine can deliver 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. 30%
= 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.
9- Symbols referring to safety standards
10- Manufacturer's serial number. Machine identification
(indispensable for technical assistance, requesting
spare parts, discovering product origin).
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)
NOTE: To lift the welding machines described in this manual,
refer to Fig. N (if applicable).
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.
CONNECTION TO MAINS
- Before making any electrical connection check that the
mains voltage ratings of the data table correspond with the
voltage of the workplace. The machine is to be fed with two
conductors (2 phases or phase-neutral) plus a third
separate one designed for the protective earth connection
(PE); this conductor is coloured yellow/green.
P L U G : C O N N E C T T O T H E M A I N S C A B L E A
STANDARDIZED PLUG OF ADEQUATE CAPACITY 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 .
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!
TIG WELDING GENERAL RULES
The TIG arc is established and maintained between a
- 12 -
2