Daihen Welbee WB-A350P, Owner'S Manual

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Chapter 1 Safety Information
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AFETY
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RECAUTION
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AFETY
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NFORMATION
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HAPTER
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1.2.10 Precautions for high-frequency wave
Observe the following safety measures to avoid the electromagnetic interference:
1.2.11 Precautions for voltage reducing device
To prevent electric shock or burn injury, ensure to follow the safety instructions below.
T I P S
• We sell Model K-300 as an exterior type voltage reducing device. For details, contact your
dealer.
• Note that the following facilities or equipment nearby may cause high-frequency wave
to invade and cause electromagnetic interferences:
Input cable, signal cable, phone cable;
Radio, television;
Computers and other control unit;
Industrial detector and safety equipment;
• Make the welding cables as short as possible.
• Run the welding cable as close to the floor or the ground as possible.
• The cable for base metal side and the cable for electrode side should be aligned with
each other.
• Do not share the earth connections of the base metal and the welding power source
with those of other machines.
• Close all the doors and covers of the welding power source and securely fix them not to
come loose for use.
• If electromagnetic interference has occurred, follow the steps above as well as the
safety measures described in "3.2.2 Electromagnetic interference".
• Be sure to install a voltage reducing device when performing AC STICK welding in the
following places.
– places surrounded by electric conductors which are very small in space, such as
inside of a double-bottom or peak tank of a vessel, of a drum or dome of a boiler
‒
places in height of 6.6 ft (2 m) or higher where it is liable to cause dangers to
workers due to fall and that is liable to workers contact grounding materials with
high conductivity of steel frame, etc.