Cebora 1753, Instruction Manual

Page: 7 / 56

7
3~50(60) Hz Three-phase power supply 50 or 60 Hz
I
1
. Absorbed current at the corresponding wel-
ding current I
2
.
IP21. Protection rating for the housing.
Grade 1 as the second digit means that this
equipment is not suitable for use outdoors in
the rain.
. Suitable for use in high-risk environments.
NOTES: The welding machine has also been designed for
use in environments with a pollution rating of 3. (See IEC
664).
3 INSTALLATION
3.1 PLACEMENT
All connections must be carried out according to current
regulations, and in full observance of safety laws (see stan-
dards CEI 26-10 CENELEC HD 427).
• Assemble the parts supplied with the welding machine.
• Follow the instructions to remove the machine from the
pallet.
• To lift the machine, use the two upper eyebolts, arranging
the cables as shown in the figure.
• The handles must not be used for lifting.
S
3.2 PRIMARY CIRCUIT CONNECTIONS
• After final inspection, the welding machine is connected to
the voltage indicated on the front panel.
• If you wish to change the supply voltage:
- Set the knob to position zero (machine off).
- Remove the knob of the selector switch by unscrewing the
holding screw.
- Position the voltage change disc so that the knob can only
turn towards the desired voltage, indicated on the front
panel.
- Insert the knob and lock it in place with the screw.
• Connect the power cord: the yellow-green wire of the cord
must be connected to an efficient grounding socket. the
remaining wires must be connected to the power supply line
through an isolator switch, located near the area if possible,
to allow rapid shut-off in case of emergency.
The capacity of the overload cut-out switch or fuses instal-
led in a serial connection with the switch must be the same
as the current
l
1
absorbed by the machine.
The absorbed current l
1
can be determined by reading the
technical specifications indicated on the machine, in regards
to the supply voltage
U
1
available.
Any extension cords must be sized appropriately for the
absorbed current
I
1
.
3.3 SECONDARY CIRCUIT CONNECTIONS
3.3.1. Connecting the electrode clamp.
• The electrode clamp must be connected to the machine in
order to observe the polarity indicator on the box of the elec-
trodes to be used. When you connect the electrode clamp
cable and the earth cable, make sure that the power termi-
nals of the cables are firmly tightened.
• The jaws of the electrode clamp must be kept tight, and
the surface in good condition, to ensure good contact with
the wire rod of the electrodes.
• Defective jaws would allow the electrodes to move,
making welding difficult.
• The connection between the cable and the electrode
clamp must always be kept tight.
• Use well-insulated electrode clamps.
• Never simultaneously touch the clamps of two different
welding machines.
• Always avoid contact between the body and the electrode
clamp or electrode.