General Notes - Cebora 3.300.286/D Manual De Instrucciones

IEC 61000-3-11 - IEC 61000-3-12.
N° Serial number, which must always be indi-
cated in any inquiry regarding the welding
machine.
Single-phase rectifier - transformer.
External machine characteristic.
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
that the machine can weld with a current I
100A for
I Welding current
2
U Secondary voltage with welding current I
2
U Rated power voltage.
1
1~ 50/60 Hz Single-phase 50-or 60-Hz 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.
IP21S Protection rating for the housing.
Grade 1 as the second digit means that this
equipment may be stored, but it is not
suitable for use outdoors in the rain, unless
it is protected.
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)
4.3 DESCRIPTION OF PROTECTION
This device is protected by a normally closed thermostat
on the power transformer.
When the thermostat is tripped the machine stops weld-
ing, 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.
5 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 stan-
dards CEI 26-23 - CEI CLC 62081).
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 groove in the
small roller 7.
Before connecting the power cable 23, make sure that
the power voltage corresponds to that of the welding
machine, then:
a) for permanent connection to the power mains without
a plug, you must insert a main switch having a suitable
capacity in compliance with the rated specifications.
b) for a plug-socket connection, use a plug having a
suitable capacity in com pliance with the rated speci-
fications. In this case the plug must be used to com-
pletely disconnect the machine from the mains, after
= 100 A. This means
2
6 out of 10 minutes, thus 60%.
setting the switch 47 to "O" (off).
The yellow-green wire must be connected to the earth
terminal. Connect the earth clamp 37 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 pro-
tection wire, the connection must be as direct as possi-
ble, 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 cur-
=
rents.
2
Turn the machine on using the switch 47.
Remove the tapered gas tip 44 by turning it clockwise.
Unscrew the contact tip 43.
2
Do not press the torch trigger until you have read the
instructions carefully.
It is important to make sure the machine is turned off
whenever changing the wire reel and wire roller, to pre-
vent the wire feed motor from starting accidentally.
Press the torch trigger 39 and release it only when the
welding wire comes out.
Welding wire can cause puncture wounds.
Never aim the torch at parts of the body, other people or
metals when loading the welding wire.
Screw the contact tip 43 back on, making sure that the
hole diameter corresponds to the wire used.
Slide the tapered gas welding tip 44 on, always turning
clockwise.
5.1 CONNECTING THE GAS HOSE
• The gas cylinder must be equipped with a pressure
reducer and flow meter.
• If the cylinder is placed on the cylinder holder of the
machine, it must be held in place by the chain provided
and be of an appropriate size to avoid jeopardizing the
stability of the machine.
• Connect the gas hose leaving the back of the machine
to the pressure reducer only after the cylinder is in place.
• Open the gas cylinder and set the flow meter to approx-
imately 8-10 lt./min.
CAUTION: Make sure the gas used is compatible with the
material to be welded.

5.2 GENERAL NOTES

Before using this welding machine, carefully read the reg-
ulations CEI 26-23 - CEI CLC 62081. Also make sure that
the insulation on cables, torch and earth cable is intact.
6 WELDING
6.1 WELDING MILD STEEL
6.1.1 With gas protection.
Either 75% ARGON + 25% CO2 or 100% CO2 may be
used for welding mild steel.
Connect the cables as shown in the figure 3.
Select the welding current by means of the rotary switchl 47.
9