Description Of Protective Devices; Thermal Protection - Cebora 351 Manual De Instrucciones

MMA Suitable for welding with covered electrodes.
TIG Suitable for TIG welding.
U0. Secondary open-circuit voltage
X. Duty cycle percentage. % of 10 minutes during
which the welding machine may run at a certain
current without overheating.
I2. Welding current
U2. Secondary voltage with current I2
U1. Rated supply voltage
3~ 50/60Hz 50- or 60-Hz three-phase power supply
I1 max. This is the maximum value of the absorbed current.
I1 eff. This is the maximum value of the actual current
absorbed, considering the duty cycle.
IP23C Protection grade of the housing, approving the
equipment as suitable for use outdoors in the rain.
C: The additional letter C means that the equip-
ment is protected against access to the live parts
of the power circuit by a tool (diameter 2.5 mm ).
S
Suitable for hazardous environments.
NOTES: The welding machine has also been designed for
use in environments with a pollution rating of 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 tem-
peratures are exceeded. When the thermostat is tripped
the message "OPn" appears on the display O on the con-
trol panel.
2.3.2 - Block protection.
This welding machine is equipped with various safety
devices that stop the machine before it can suffer dam-
BO
BB
BA
BC
BD
BI
BL
Art. 351 & 352
12
age. When any protection is tripped, the message "Err"
appears on the display O along with a number that
appears on the display U.
If a low water level is detected for the cooling unit the
abbreviation H2O flashes on the display O.
3 INSTALLATION
Make sure that the supply voltage matches the voltage
indicated on the specifications plate of the welding
machine.
When mounting a plug, make sure it has an adequate
capacity, 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
installed in series with the power supply must be equiva-
lent to the absorbed current I1 of the machine.
3.1. START-UP
Only skilled personnel should install the machine. All con-
nections must be carried out according to current regula-
tions, and in full observance of safety laws (CEI 26-23/
CEI CLC 62081).
3.2 DESCRIPTION OF THE EQUIPMENT (Fig.1-1/A).
BA) Negative output terminal (-).
BB) Positive output terminal (+).
BC) TIG torch trigger connector.
BD) Fitting (1/4 gas).
BE) Main switch.
fig. 1
BF
BN
BM
BN
Art. 352
Connect the wires of the torch trigger to pins 1 and 9.
This is where the gas hose of the TIG welding torch
is to be connected.
BG
BE
BP
BQ
BR
BH
Art. 351