Telwin Plasma 54 Manuel D'utilisation page 7

too far apart, if there is excessive electrode wear or if the torch is
taken away from the piece by force.
- If a SAFEGUARD system has triggered.
4- Green LED indicating presence of mains power supply and that
auxiliary circuits are powered.
The control and service circuits are powered.
5- Red LED indicating compressed air circuit (where present).
When this is lit it indicates overheating in the electric motor windings
on the air compressor.
6- Pressure gauge.
Used to read the air pressure.
7- Torch connection connector.
Torch with direct or centralised connection.
- The torch button is the only control device that can be used to
control the start and end of cutting operations.
- When the button is released the cycle is instantly interrupted at any
stage, while cooling air (post air) continues.
- Accidental operation: the cycle will only start if the button is
pressed and kept down for a minimum of some tenths of a second.
- Electrical safeguard: button operation is disabled if the insulating
nozzle holder has NOT been mounted on the head of the torch, or
if it has been mounted incorrectly.
8- Earth cable connector
Front panel (Fig. D2)
1- Cutting current adjustment knob.
Used to set the cutting current intensity supplied by the machine, to
be chosen according to the application (material thickness / speed).
See the TECHNICAL INFORMATION for the correct duty cycle-pause
to be chosen, depending on the selected current.
2- Red LED indicating general alarm event:
- When this comes on it indicates overheating of a component in the
power circuit, or an incorrect input power supply voltage (over- or
under-voltage). Mains over- or under-voltage safeguard: stops the
machine: the power supply voltage is outside the +/- 15% range
based on the rating plate value. WARNING: Exceeding the higher
voltage limit given above will seriously damage the device.
- During this event all machine operation will be disabled.
- Reset is automatic (the red LED goes off ) when the values
determining the above faults return within allowed limits.
3- Yellow LED indicating that the torch is powered.
- When this is lit it indicates that the cutting circuit is enabled: Pilot
Arc or Cutting Arc "ON".
- When it is off (cutting circuit OFF) the torch button is normally
DISABLED (standby mode).
- It is off, with the torch button enabled, under the following
conditions:
- During the POST AIR phase.
- If the pilot arc is not transferred to the piece within a maximum of
2 seconds.
If the cutting arc is interrupted because the torch and piece are
too far apart, if there is excessive electrode wear or if the torch is
taken away from the piece by force.
- If a SAFEGUARD system has triggered.
4- Green LED indicating presence of mains power supply and that
auxiliary circuits are powered.
The control and service circuits are powered.
5- Yellow LED indicating phase failure (where provided).
When it comes on the yellow LED indicates a main supply phase
failure, operation is disabled and reset is automatic 4 seconds after
the fault has been corrected.
6- Compressed air circuit fault indicator (where provided).
YELLOW LED (Fig. D2-6) at the same time as RED general alarm LED
(Fig.D2-2 ).
When ON it means that the air pressure is insufficient for correct torch
operation. During this event all machine operation will be disabled.
Reset is automatic (the LED's go off ) when the pressure returns within
the allowed limits.
7- Air button (where provided).
When this button is pressed, air will continue to be output from the
torch for a fixed time.
It is normally used:
- for cooling the torch
- when adjusting the pressure reading on the pressure gauge.
8- Pressure gauge.
Used to read the air pressure.
9- Torch connection connector.
Torch with direct or centralised connection.
- The torch button is the only control device that can be used to
control the start and end of cutting operations.
- When the button is released the cycle is instantly interrupted at
any stage, while cooling air (post air) continues.
- Accidental operation: the cycle will only start if the button is
pressed and kept down for a minimum of some tenths of a second.
- Electrical safeguard: button operation is disabled if the insulating
nozzle holder has NOT been mounted on the head of the torch, or
if it has been mounted incorrectly.
10- Earth cable connector
5. INSTALLATION
WARNING! BEFORE
OPERATIONS AND MAKING ELECTRICAL CONNECTIONS, ALWAYS
MAKE SURE THAT THE PLASMA CUTTING SYSTEM HAS BEEN
SWITCHED OFF AND DISCONNECTED FROM THE MAIN POWER
SUPPLY.
ELECTRICAL CONNECTIONS MUST BE CARRIED OUT ONLY AND
EXCLUSIVELY BY ESPERT OR SKILLED TECHNICIANS.
PREPARATION
Unpack the machine, assemble the separate parts supplied with the
package.
Assembling the return cable-earth clamp (Fig. E)
HOW TO LIFT THE MACHINE
All the machines described in this manual must be lifted using the handle
or the sling provided with the machine, if the model has one (fitted as
shown in FIG. F).
POSITIONING THE MACHINE:
The machine must be installed in a place where there are no obstructions
to the cooling air input and output apertures; at the same time, make
sure that there is no possibility of conductive powder, corrosive vapour or
moisture etc. being sucked into the machine.
Allow at least 250 mm of free space all around the machine.
WARNING! Prevent the machine from tipping up or shifting
dangerously, by positioning it on a level surface that is able to
support its weight.
CONNECTION TO THE MAIN POWER SUPPLY
- Before making any electrical connection whatsoever, check the power
source rating plate to make sure that the mains voltage and frequency
correspond with those at the place where the machine is to be installed.
- The power source must be connected only and exclusively to a power
supply system with a neutral conductor connected to earth.
- In order to guarantee protection against indirect contact use RCD's of
the following types:
) for single phase machines;
- Type A (
- Type B (
- In order to satisfy the requirements of Standard EN 61000-3-11
(Flicker) we recommend connecting the power source to power supply
interface points with an impedance of less than the values shown in
table 1 (TAB.1).
- The plasma cutting system does not fall within the requisites of IEC/EN
61000-3-12 standard.
Should it be connected to a public mains system, it is the installer's
responsibility to verify that the plasma cutting system itself is suitable
for connecting to it (if necessary, consult the distribution network
company)
Plug and socket
- Single phase models with absorbed currents no greater than 16A are
supplied with a power supply cable with a standard plug (2P+T) 16A
\250V.
- Single phase model with absorbed currents greater than 16A and
3-phase models have power supply cables that are to be connected to
standard plugs, (2P+T) for single phase models and (3P+T) for 3-phase
models, with appropriate capacities. Prepare a mains outlet fitted
with a fuse or an automatic circuit-breaker; the corresponding earth
terminal must be connected to the (yellow-green) earth conductor for
- 7 -
CARRYING OUT
) for 3-phase machines.
INSTALLATION