INSTRUCTIONS FOR PLASMA CUTTER
Before using this device all people authorized to its use, repair or
inspection, should read the book
“Safety rules”
and the
“
Instruction manual
” specific for every machine. Contact your
distributor if you have not understood some instructions.
1 SAFETY DEVICES
This unit is provided with the following safety devices:
Thermic:
located on the power transformer windings to avoid
overloads. Signalled by indicator light
F
on (see pict. 1 - 1a).
Pneumatic:
located on the torch feed line to avoid insufficient air
pressure. Signalled by indicator light
E
(see pict. 1 - 1a).
Electric:
located on torch body to avoid dangerous voltages
while replacing nozzle, diffuser, electrode or nozzle holder.
- Do not remove or short-circuit the unit safety devices.
- Only use genuine spares.
- Always replace any damaged part of the unit or torch with
genuine material.
- Only use genuine torches.
- Do not let the unit work without covers. This would be
dangerous for operator and for those who are surrounding
the work area and would prevent the unit from cooling
efficiently.
2 DESCRIPTION OF TECHNICAL SPECIFICATIONS
EN60974-1
This machine is manufactured according
EN60974-7
to these international standards.
ART
Article number with serial number must
appear on any requests concerning the
machine.
Three-phase
transformer-rectifier.
Drooping
characteristic.
Plasma arc cutting.
Uo
Secondary no-load voltage.
X
Duty - factor percentage. The duty - cycle
expresses the percentage of 10 minutes in
which the welding machine can operate at a
determined current, without over heating.
I
2
Welding current.
U
2
Secondary voltage with welding current I
2.
U
1
Nominal supply voltage.
3~50/60Hz
Three-phase supply 50 or 60Hz.
I
1
Absorbed current at the corresponding
welding current I
2
.
IP21
Grade of protection of frame. Grade 1 as a
second number means that this unit is not fit
to work outside under the rain
Fit to work in high - risk areas.
NOTES
In addition, the welding machine has been
designed to work in areas with grade 3 of
pollution (See IEC 664).
3 DESCRIPTION OF UNIT DEVICES (see picture 1 - 1a and 2)
A) 230V-0-400V switch.
B) Mains pilot light.
C) Cutting power adjusting knob (only item 424).
D) Texas connection.
E) Light signalling air pressure is not enough.
F) Light signalling thermostat.
G) Torch.
H) Air pressure reducing unit.
I) Gauge.
J) Mains input cable.
N) Fixed adapter (only for item 424).
3.1 ASSEMBLY AND ARRANGEMENT
Unpack the unit and assemble the handle with the supplied
spanner. Place the unit in properly ventilated if possible undusty
room making sure that the air inlet and outlet from cooling slots
are not obstructed.
The machines items 420 and 424 are suitable only for
ELETTRO CF torches type P70. ELETTRO CF does not
assume any responsibility in case that a different kind of
torch is used.
3.2 SETTING AT WORK
The unit must be installed by skilled personnel. All fittings
must be in conformity with the existing rules and in full
compliance with safety regulations.
Connect the air feed to fitting on the air pressure reduction unit
H
(pict. 2) making sure that pressure is 88PSI (6bar or KPaX100)
at least with a minimal capacity of 420 CFH (200 litres/min).
Should air feed come from a pressure reducing unit of a
compressor or of a centralized plant, the reducing unit should be
adjusted at the highest output pressure which should not exceed
120 PSI (8bar or KPa x100). Should air feed come from a
compressed air bottle, this should be provided with a pressure
regulator;
never connect compressed air bottles directly to
the reducing unit! Pressure may exceed the reducing unit
capacity and then explode!
Check that the mains power supply matches that indicated on
the technical date plate of the machine. The change of voltage
(see pict. 3) is obtained by rotating the disk set under the knob of
the switch
A
(pict.1 - 1a).
Connecting supply cable
J
(pict. 2): the yellow-green wire must
be connected to an efficient earth plug of the system, the
remaining wires should be connected to a switch placed, if
7
Содержание Plasma 420
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