EMC device can be classified by power nameplate or technical data.
hanker welding machines belong to Class A.
4.4 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
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