Description Of Protective Devices - Cebora INVERTER TIG Manual De Instrucciones

Single-phase static
f
1
f
2
transformer-rectifi er frequency converter.
Drooping characteristic.
MMA Suitable for welding with covered electrodes.
TIG. Suitable for TIG welding.
U0. Secondary open-circuit voltage.
X. Duty cycle percentage. 10min. % when the
machine can work according to a given voltage
without causing overheating.
I2. Welding current.
U2. Secondary voltage with current I2.
U1. Rated supply voltage.
1~ 50/60Hz 50- or 60-Hz single-phase power supply.
l1 max. This is the maximum value of the absorbed
current.
l1 eff. This is the maximum value of the actual current
absorbed, considering the duty cycle.
IP23 With this cover protection degree the machine
is suitable for use outdoors underthe rain.
S
Suitable for hazardous environments.
NOTES: This welding machine is suited for work in envi-
ronments with pollution rating 3. (See IEC 664).

2.3 DESCRIPTION OF PROTECTIVE DEVICES

2.3.1 Thermal protection.
This machine is protected by a temperature probe, which
prevents the machine from operating if the allowable
temperatures are exceeded. The thermostat tripping is
signalled by the glowing abbreviation "OPn" on display
U located on the control panel.
2.3.2 Block protection.
This welding machine is equipped with various protec-
tive devices that stop the machine to avoid machine da-
mages. The tripping of each protection device is signal-
led by the glowing abbreviation "Err" on display U and by
a digit shown on display O.
If a water low level for the cooling unit is detected
the fl ashing abbreviation H2O will glow on display U.
3 INSTALLATION
Make sure that the supply voltage matches the voltage
indicated on the specifi cations plate of the welding ma-
chine.
When mounting a plug, make sure it has an adequate ca-
pacity, and that the yellow/green conductor of the power
supply cable is connected to the earth pin.
The capacity of the overload cutout switch or fuses in-
stalled in series with the power supply must be equiva-
lent to the absorbed current I1 of the machine.
3.1. ASSEMBLY
Only skilled personnel should install the machine. All
connections must be carried out according to regula-
tions in force, and in full observance of safety laws (CEI
26-23 / IEC-TS 62081)
3.2 DESCRIPTION OF THE EQUIPMENT (FIG.1).
BA) Output terminal, negative (-).
BB) Output terminal, positive (+).
BC) Connector for TIG welding torch trigger .
Connect torch trigger cables to pins 1 and 9.
BD) Fitting (1/4 gas)
Used to connect TIG welding torch gas hose .
BE) Main switch.
BG) Power cable
BH) Gas supply fi tting .
BO) Connector Type DB9 (RS 232). To be used for
updating the microprocessor programs.
BQ) Power supply socket.
BR) Pressure switch socket.
3.3 PANEL DESCRIPTION (fi g. 2)
AT process key.
·Selection is shown by one of the glowing LEDs
AX, AV, or AW.
Led AX Led AV
Mode button E.
Selection is shown by one of the glowing LEDs F,
G, H, I, L, M, N, or PP.
The TIG LEDs lighted will be two at any time, one showing the HF or contact start-up mode and the other
showing the continuous or pulsed mode with 2 or 4 sta-
ges control. Every time this push-button is pressed a new
selection is obtained. The LEDs glowing against the con-
cerned symbols show your selection.
F - LED. TIG welding with arc start-up wi-
thout high frequency.
To light the arc press the welding torch button and with
the tungsten electrode touch the workpiece and then
take it up. The stroke must be fi rm and rapid (0.3 sec).
L - LED. TIG welding with arc start-up with
high frequency.
Press the torch trigger and a high voltage/frequency pilot
spark will light the arc.
G - LED. TIG 2 stages continuous welding
(manual).
When the torch trigger is pressed, the current begins to
increase over the previously set "slope up" time, until it
reaches the value set by means of the knob AA. When
the trigger is released the current starts to decrease over
the previously set "slope down" time and returns to zero.
In this position the pedal control accessory ART. 193 can
be connected.
H - LED. TIG 4 stages continuous welding
(automatic).
This program differs from the previous one in that the arc
is both started and shut off by pressing and releasing the
torch trigger.
Led AW
11