2
SAFETY
Disconnect the power source before
servicing it. Contact with the manufacturer or agent
immediately to acquire the service and support
skills when users do not have the ability to repair it.
WARNING
TECHNICAL DESCRIPTION
Environment
• Working temperature: -10º C~40º C.
• Transportation and storage: -25º C~55º C.
• Relative air humidity: 40º C≤50%; 20º C≤90%.
• The dust, acids, corrosive gases and substance in
the ambient air must be lower normal level except
those from welding process.
• Altitude must be less than 1km.
• Keep good ventilation at a distance of 50cm around.
• Put it in somewhere the speed of wind not
less than 1m/s.
Input Power
• Power supply waveform should be sine wave and
frequency fluctuations with less than +-1% of its rating.
• The fluctuations of input voltage must be
lower than +-10% of the rated value.
Equipment Principle
AC-50/60 Hz
High voltage
Low amperage
DC-Rippled
High voltage
Low amperage
AC-20,000 Hz
Low voltage
High amperage
DC-Rippled
Low voltage
High amperage
DC-Smooth
High voltage
Low amperage
AC-20,000 Hz
High voltage
Low amperage
DC-Smooth
Low voltage
High amperage
NOTES: This is inverter technology. The main part as follow:
Rectifier Filter IGBT Transformer Rectifier Choke
Equipment Structure
The ECN Inverter DC MMA Welder uses portable cabinet
structure: the upper part of front panel has been equipped
with welding current adjustment knob, power indicator (green),
abnormal indicator (yellow). The output terminal is fitted with
quick connector both “+” and “-”. The back panel owns power
switch, motor fan, input power cable. The inside body of the
machine includes PCB main board, electronic components,
radiator etc.
Standard
• EN 60974-1: Arc Welding Machine Standards
• JB / T 7824: Technical Conditions of Inverter
Arc Welding Rectifier
• GB 4208: Protection Class (IP Code)
Symbol Chart
Note that only some of these
symbols will appear on your model.
• Prohibit non-professionals to change or replace
the welder.
• Since the welder owns strong electromagnetic and radio
frequencies, the people with cardiac pacemakers
affected by the interference electromagnetic, electrical
frequency are not allowed to stay nearby.
• When it works, please pay attention to its rated duty
cycle. Do not overload.
Safety Precaution for Installation and Location
• In some areas, where something may fall from the sky,
personal safety precaution should be taken.
• In some areas around construction site, something like
the dust, acid, corrosive gases or other substance in
the air can nor exceed the standard value except those
generated while welding.
• It is should be equipped in the open air where there
is no direct sunlight, anti-rain, temperature range
from -10º C to +40º C and low humidity place.
• 50 cm space is needed to ensure good ventilation.
• No metal impurities are tolerant inside the welder.
• In some areas, there is no severe vibration.
• Make sure no interference will be caused to
the surrounding in the welding area.
• Whether the power supply capacity is sufficient to allow
the welder to work normally or not. And a safety
protection device should be equipped in the input power.
• Prevent it from dumping if the welder is put in the place
of over 10°incline.
Security Check
The following items must be checked up by the operator each
time before access to the power source.
• Make sure the power socket is reliably grounded.
• Make sure the output terminals are well connected
without short circuit.
• Make sure output and input cables are perfect with
no exposure.
The welding machine must be inspected by professionals at
regular time (not exceed 6 months). The contents as follow:
• Whether the electronic components are loosed or not
and dust removal must be conducted.
• Whether the panel mounted on the device should be able
to guarantee the normal implementation of the machine.
• Whether the input cables are damaged or not. If yes,
safe handling must done.
On
Off
Dangerous
voltage
Increase / Decrease
AC auxiliary
power
Hz
f
+
Hertz
(cycles / sec)
Direct current
(DC)
Frequency
Negative
Positive
