Telwin 952699 Bedienungsanleitung Seite 10

heat and then separated.
- The torch uses compressed air from a single source, for
both the plasma and cooling and protective gas.
- The start of the cycle is determined by an arc, called the
pilot arc, which is struck between the mobile electrode ( -
ve polarity) and the torch nozzle ( +ve polarity ) due to the
short circuit between these two elements.
- When the torch is brought into direct contact with the
workpiece to be cut (connected to the +ve polarity of the
power source) the pilot arc is transferred between the
electrode and the workpiece itself thus striking a plasma
arc, also called cutting arc.
- The duration of the pilot arc is set in the factory at 2 sec; if
the transfer has not been made within this time, the cycle
is automatically stopped except for the cooling air which is
kept on.
- To recommence the cycle, the torch button must be
released and pressed again.
UNIT COMPOSITION.
The plasma cutting system includes:
- POWER SOURCE PLASMA
complete with:
- Mains cable
- Kit of connectors for compressed air
- Earth cable with clamp
- Plasma cutting torch
PLASMA CUTTING POWER SOURCE 31
- Electric protection
- Case protection degree
- Insulation class
- Dimensions (mm)
EARTH OF MACHINE (Table 1)
MANUAL TORCH FOR PLASMA CUTTING
(supplied as standard)
- Gas used
:
:
:
: 430x165x270
INPUT
OUTPUT
: dry compressed air
- Compressed air pressure :
- Total air flow rate (for Plasma and cooling): 100 litres / min
- Arc striking system
- Cutting current
- Weight (kg )
WARNING !
SAFETY OF PLASMA CUTTING SYSTEM.
Only the type of torch and its relative connection to the
power source indicated in the "TECHNICAL DATA" ensure
the efficacy of the safety measures adopted by the
manufacturer (interblocking system).
- DO NOT USE torches and relative consumables different
from original ones.
- DO NOT TRY TO FIT
procedures to this power source, if they are not described
in these instructions.
- IF THESE RULES ARE NOT OBSERVED serious
dangers may occur both to the user and to the machine.
INSTALLATION
ASSEMBLING OF SEPARATE PARTS:
Unpack the PLASMA and assemble the different parts: see
figure B of the compressed air connection
assembly diagram (Fig. L)
COMPRESSED AIR CONNECTION
Class I
Arrange a compressed air distribution line having the
IP 23
following minimum features: Air pressure 4,5 bars; capacity
F
100 L/min.
WARNING !
Air with considerable quantities of humidity or oil may
cause an excessive wear of the parts or even damage
the torch.
If there are any doubts about the quality of the compressed
air available, we advise to use an air dryer, to be installed
above the entry filter.
Connect, by means of a flexible piping, the compressed air
line to the machine, using one of the connectors included to
be set on the entry air filter, which is on the rear of the
machine.
Figure (B) compressed air connection
WARNING !
Do not exceed maximum entry pressure of 8 bars.
POWER SUPPLY CONNECTION
The machine must be connected to a Line-Neutral system
with a "PE" protected grounding wire.
Check that the relevant socket terminal is actually
connected to the distribution system grounding.
CONNECTION TO GROUND CABLE
Connect the work cable clamp to the piece to be cut or to the
metallic workbench.Take following precautions:
- VERIFY THAT THERE IS A GOOD ELECTRIC CONTACT
PARTICULARLY IF INSULA TED OR OXIDA TED COATED
SHEETS ARE CUT.
- MAKE GROUND CONNECTION AS CLOSE AS
POSSIBLE TO CUTTING AREA.
- THE USE OF METALLIC STRUCTURES WHICH ARE
NOT PART OF THE WORKPIECE, SUCH AS THE
RETURN CABLE OF THE CUTTING CURRENT, MAY
ENDANGER THE SAFETY SYSTEM AND GIVE POOR
CUTTING RESULT S.
- DO NOT MAKE A GROUND CONNECTION ON THE
PIECE WHICH HAS TO BE REMOVED.
- 10 -
: contact between mobile
electrode and nozzle
: 15 ÷ 40 A
:
torches for cutting or welding
and the belt
TAB.1
4.5 bar
1,4kg