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Radiation Class B device.
It can meet the radiation requirements of residential area and industrial area. It also can
be used in residential area which power is supplied by public low voltage circuit.
EMC device can be classified by power nameplate or technical data.
Hi-zone welding machines belong to Class A.
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1.4. EMC measure
In the special situation, The specified area may be affected, the standard of radiation limit value
has been complied with (eg: The device, which is easy effected by electromagnetism, is used at the
installation location, or there is radio or TV near the installation location). In this condition, the
operator should adopt some appropriate measures to remove interference.
Accoring to the domestic and international standards, the ambient devices’ electromagnetism
situation and anti-interference ability must be checked:
Safety device
Power line, Signal transmission line and Date transmission line
Date processing equipment and telecommunication equipment
Inspection and calibration device
The effective measures avoid the problem of EMC:
a)
Power source
Even though the power source connection meet rules, we still need to take additional
measure to remove the electromagnetic interference. (eg: Use the right power filter.)
b)
The welding line
Try to shorten the length of cable
Put the cable together
Be Far away from other cable
c)
Equipotential connection
d)
Ground connection of work-piece
When necessary, use appropriate capacitance to connect the ground.
e)
Shielding, when necessary
Shield the ambient devices
Shield the whole welding machine
