Cebora bravo 165 combi Manual De Instrucciones página 9

Single-phase Transformer - Rectifier
Three-phase Transformer - Rectifier
External characteristics of the unit.
Uo Secondary no-load voltage (peak value)
X The duty cycle expresses the percentage of
10 minutes during which the welding machine
can run at a certain current without overheating.
Example: X = 60% at I
This means that the machine can weld with a
current I = 100A for 6 out of 10 minutes, thus
2
60%.
I Welding current
2
U Secondary voltage with welding current I
2
U Rated power voltage.
1
1~ 50/60 Hz 50-or 60-Hz single-phase power supply.
3~ 50/60 Hz 50 or 60 Hz three-phase power supply.
I Current absorbed at the corresponding weld-
1
ing current I
IP21 Degree of housing protection.
Grade one as the second digit means that this
device is not suitable for use outdoors in the
rain.
S Suitable for use in increased hazard areas.
NOTE: The welding machine has also been designed for use
in environments with grade 3 pollution (see IEC 664)
3.3 DESCRIPTION OF PROTECTION
This device is protected by a normally closed thermostat on
the power transformer.
When the thermostat is tripped the machine stops welding,
while the motor-driven fan continues to run and the yellow
LED lights.
After it has been tripped, wait a few minutes to allow the
generator to cool down.
4 INSTALLATION
The machine must be installed by skilled personnel. All
connections must be made in compliance with current
regulations and in full respect of safety laws (see standards
CEI 26-10 and CENELEC HD 427).
= 100 A
2
2
Make sure that the wire diameter corresponds to the one
indicated on the roller, and mount the wire reel. Make sure
that the welding wire passes through the wire feed roller
groove.
After the final inspection, the three-phase welding machines
are connected to the voltage stated on the mains cable.
To change the supply voltage (three-phase version only)
remove the fixed side panel and set the connections of the
voltage-changing terminal board as shown in the figure.
The mains cable must be equipped with a plug suitable for
the current input.
2
Fig. 3
Before connecting the power cable (16), make sure that the
power voltage corresponds to that of the welding machine,
then:a) for permanent connection to the power mains with-
out a plug, you must insert a main switch having a
suitable capacity in compliance with the rated speci-
fications.
b) for a plug-socket connection, use a plug having a
suitable capacity in compliance with the rated speci-
fications. In this case the plug must be used to
completely disconnect the machine from the mains,
after setting the switch to "O" (off).
The yellow-green wire must be connected to the earth
terminal. Connect the earth clamp to the part to be welded.
The welding circuit must not be deliberately placed in direct
or indirect contact with the protection wire except in the
workpiece.
If the workpiece is deliberately grounded using the protec-
tion wire, the connection must be as direct as possible, using
a wire at least as large as the welding current return wire, and
connected to the workpiece at the same point as the return
wire, using the return wire clamp or a second grounding
clamp placed next to it.
All precautions must be taken to avoid stray welding currents.
Turn the machine on using the switch.
Remove the tapered gas tip (51) by turning it clockwise.
Unscrew the contact tip (50).
Do not press the torch trigger until you have read the
instructions carefully.
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