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• The puckering angle of the torch cable can not
be too small, otherwise the inside cable of gas
pipe will be damaged which can result into
accident.
• Never allow anybody else other than the opera-
tor himself to access the job site.
• No touching on the output connection or any
other electrification parts while welding.
Safety Measures to Be Taken To Assure the
Correct Installation and Position
• Precaution must be taken to keep the operator
and the machine from the foreign materials falling
from up above
• The dust, acid and erosible dirt in the air at the
job site can no exceed the amount required by
the norm (excluding the emission from the cutter).
• The cutting machine must be installed in the place
where it can no be exposed to sun and rain. Also
it must be stored in less humid place with the tem-
perature range at -10∼ +40°C.
• There should be 50cm space left for the cutting
machine to have good ventilation.
• Make sure that there is no metal-like foreign body
to enter the cutting machine.
• No violent vibration in the cutter's surrounding
area.
• Make sure the machine is installed in where it
won't interfere the surrounding electromagnetism
equipment during the operation.
• Take measures to prevent wind while operating in
the strong wind since the cutter is gas shielded.
Safety Check
Each item listed below must be carefully checked
before operation:
• Make sure that the cutting machine has reliable
earth connection.
• Make sure that there is always sound output
and input wire connection instead of exposing
outside.
Regular check needs to be conducted by the quali-
fied personnel after the cutter has been installed over
a period of six months, which involves as follows:
• Routine cleaning is required to make sure there
is no abnormal condition happening in the tight-
ened places such as the loose and slipped mag-
netic core, regulating screw, connecting wire hap-
pening in the cutting machine.
• The external parts installed on the cutter's panel
must guarantee that the welder works properly.
• Fresh the cable of the cutter if it is worn out..
• Any damage to the input cable if occurred should
be dealt safely.
• Make sure whether there is enough power supply
21
to make the cutting machine work properly, and
the power supply connected into the cutter should
be equipped with safety protection device.
Notice: Cut off the power supply before opening
the case to check.
Please do not hesitate to contact us for technical
assistance whenever you come across the prob-
lems you can not work out or you may deem diffi-
cult to fix.
Technical Specifications
Environment for the Product
• The surrounding temperature range:
When cutting: -10∼ +40°C
During transport or in storage: -25∼ +55°C
• Relative humidity:
When at 40°C: ≤50%
When at 20°C: ≤90%
• The dust, acid and erosible materials in the air
can not exceed the amount required by the norm
(apart from the emissions from the cutter ). No
violent vibration at the job site.
• Keep from raining when it is used outdoor.
Requirement for Main Supply
• The voltage oscillogram should display actual
sine wave.
• The oscillation of the supplied voltage should not
exceed ±20% of the rated value.
• The imbalance rate of three phases main supply
should not less than 0.5%.
• Frequency fluctuation should be less than ± 2%.
Theory of Cutting Machine (see the princi-
ple chart)
Rectifier
Filter
Inverter
Functi-
on
Drive
Protection
inspect
The principle chart
POWERCUT Series Air POWERCUT 70S is high
speed cutting equipment with advanced technology
which is using high density plasma arc as source of
Transfor-
High
mation
frequency
rectifier
Modulate
Trait
Sampling
control
Process
Current
control
adjust-
ment
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