Würth POWERCUT 70S Originalbetriebsanleitung Seite 22

the heat. The plasma arc would be acquired by the
compressed air as ionization medium and the com­
pression of the torch's nozzle.
The main electric theory of POWERCUT 70S: 400V
3­phase industrial AC power is required, and trans­
fer to DC after rectified by Single phase rectifica­
tion bridge and transformed by the middle frequency
transformer, and then rectified to the DC by the fast
recovery diode, While starting cutting, the nozzle
and electrode are separated quickly by the air pres­
sure, the voltage between them make the air are ion­
ization and arc which is moved between work piece
and electrode pilots .
Cutter's Structure
POWERCUT 70S applies portable box structure:
digital display, protect indictor light, the cutting cur­
rent adjust knob, are installed on the first half of the
front board; and the current output '+' electrode
quick connector, '­' electrode quick connector, cut­
ting torch control(two pins socket), switch socket are
installed on the next half; the power inlet, Impressed
gas input connector and power switch, are installed
on the back board; the control transformer, control
press circuitry board can be seen on the first installa­
tion board after shelling the out case; the rectification
bridge etc. are installed on the bottom, the medium
frequency transformer, fast recovery rectifiers, heat
sink etc. are installed in the centre of the box.
Cutter Type Coding
• Combination of the English letter and the Arabic
numerals.
• Implication of Coding
Main Technical Data
Items
Rated input voltage
Power supply frequency
Phase
Rated input capacitance
Rated input current
Output non­load voltage
Rated operation voltage
Output Current
Gas flow
Air pressure
Lag gas time
POWERCUT
Unit Type
70S
V 400
Hz 50/60
PH. 3
KVA 9.2
A 13.5
V 330
V 108
A 25­70
L/min 300
MPa 0.3∼0.6
s 5∼15
Max cutting thickness
Rated duty cycle
Cooling type
Arc start type
Insulation grade
case Protection Class
Weight
Dimension (LxWxH)
Applying Norm of Cutter
POWERCUT 70Sconforms with the following stand­
ard to perform EN 60974-1.
Installation & Maintenance of the Torch &
Replacement of the Spare Parts
Please notice: Please make sure the power sup­
ply switch is off before loading/unloading the cutting
torch and replacing the spare parts.
• The installation of the torch's spare parts should
follow the order according to the pictures listed
blow. Please notice during the installation: the dis­
tributor should not be installed in reverse, and the
protection cover should be screwed tightly, but
please be alert that over pressure would smash
the distributor.
• While the nozzle's hub hole is burnt to a degree
that it will affect the cutting slot, it should be
replaced in time
• The electrode should be replaced in time when it
worn down or be shortened to about 2mm, oth­
erwise the torch will be broken. (See the follow­
ing pictures.)
Cutting Torch Assemble Sketch
• If there are any spare part s or the distributor are
broken, they should be replaced in time.
• The torch's cable, working gas pipe, protection
cover or the wire are broken, then they should be
replace in time
mm 25
% 60
Fan­cooled
High­frequency
transfer arc
grade H
IP IP21S
kg 17
mm 556x250x407
22