YASKAWA MOTOWELD-T300D, Instructions Manual

Page: 5 / 70

5
WARNING
Be sure to observe the following warnings avoid an electric shock.
•
Never touch the charged parts.
Touching the charged parts may result in critical electric shock or burns.
•
Only a qualified person in electric construction should perform grounding construction for the
welder case and base metals (to be welded) or jigs that are electrically connected to the base
metals as specified in the electric facility technical reference.
•
Be sure to perform installation or maintenance and inspection five minutes after all the input
power supplies are turned OFF by using switches in the switch box.
If any input power supply is turned ON, the input circuit and the itnerior of the welder are charged. When
the welder is ON, the electrodes, base metals, and metallic parts contacting them are charged. Even if the
input power supply is turned OFF, the capacitor may still be charged. Be sure to confirm that charged
voltage is gone before starting operations.
•
Do not use any input or output cable of insufficient capacity or damaged or with its conductor
exposed.
• Tighten the cable connecting sections firmly and insulate them.
• Connect the cable at the base metal as close to the welding part as possible.
• Do not use the welder with its case or cover removed.
• Be sure to use the welder after attaching the cover on the input or output terminal box.
• Do not use worn, damaged or wet gloves. Always use dry insulated gloves.
• Use lifelines when working at hights.
• Perform maintenance and inspection periodically. Repair damaged parts immediately.
• Turn OFF all equipment input power supplies when not being used.
CAUTION
Be sure to observe the following cautions and use protectors to
protect yourself or other people from arc beams, spatters, slugs
or noise generated from welding.
• Wear welding mask or shaded glasses appropriate for welding.
• Wear protective glasses to protect your eyes from spatters or slags.
Scattered spatters or slags may damage eyes or burn the skin.
• Use such protectors as leather gloves, clothes with long sleeves, leg covers, or leather aprons
for welding.
• Install protective curtains around the weling site to protect your eyes from arc beams.
Arc beams may irritate eyes or burn skins.
• Use noise protector when there is excessive noise.
Noise may damage hearing.