10
INTRODUCTION
The Equipment
Your plasma cutting set consists of:
•
A inverter based power unit.
•
A air filter regulator.
•
A air cooled plasma torch.
The sequence of operation is started by pressing the torch trigger. Air will flow from
the torch, if the torch is in position on the work piece the arc will then start and cut-
ting begin.
When the cut is finished and the trigger released, the torch cooling air will continue
to flow for a short time.
The power unit has a variable current control, current should be set according to
the thickness of the material to be cut, a higher current than required will lead to a
shorter consumable life but a higher rate of cutting.
The Process
Plasma cutting relies on the fact that, if a gas or mixture of gases, such as air, is
subjected to a very high temperature it becomes ionized, i.e. negative electrons
are separated from the atom which is then positively charged.
This ionized state of the gas is called plasma and, in this state, the gas is electrically
conductive. The high temperature necessary to create the ‘plasma’ is achieved, in
the case of Plasma cutting, by a standing electric arc. This is constricted by forcing
the ‘plasma’ through a small nozzle which increases the temperature of the arc to
over 24,000°C, and concentrates it into a very small area.
When this ‘plasma’ is directed at a conductive material the arc is transferred
through the ‘plasma’ (transferred arc operation) to the material. The high energy of
the arc melts the material which, so long as it is within the cutting range of the
equipment, will be displaced by the gas flow.
In order to initiate the standing arc it is necessary to produce an ionized path in the
gas.
This is achieved by applying a very high voltage, at a high frequency, between the
electrode and the nozzle. As soon as the air is ionized, the pilot arc will ignite. This
transfers the arc to the workpiece, and the main arc will now start cutting.
11
INTRODUCTION….cont
Model
05175
Input Current
16 amps
Input Voltage
AC230V 50Hz
OCV
230 v
Output Current Range
10-40 amps
Cutting Voltage
96 v
Duty Cycle
40 amps @ 60%
No Load Consumption
35 watts
Arc starting
Contact
Efficiency
85%
Power Factor
0.93
Insulation Class
F
Protection
IP23
Weight
8 Kg
Unit Dimensions
380x178x295
Compressed Air
150 L/min 4.5 bar
TECHNICAL SPECIFICATIONS
The Plasma 45 is made with advanced inverter technology.
The inverter works by converting the mains supply at 50Hz to a high frequency volt-
age at 100KHz, this voltage is then controlled by a PWM system before passing to the
transformer and then the rectifier.
By using inverter technology the weight and volume of product can be reduced,
while the efficiency is raised to 85%.
The Plasma 45 is capable of cutting mild steel, carbon steel, stainless steel, alloy
steel, copper and other nonferrous metals.
They are very portable, controllable and energy efficient.
Содержание 05175 Plasma 46
Страница 2: ...2 19...
