Welding of the principle of electric shock
Hebei small make up tell you welding electric shock prevention principle of nozzle
Shell: not a grounded in welding welding machine insulation damage to the shell with voltage, if someone touch welding machine shell, the human body with the earth and neutral power supply ground wire (three phase four wire system neutral point grounding) generally constitute a loop, such as in the figure above with the arrow shown in dotted lines, electric current will cause accident getting an electric shock through the human body.
Enclosure grounding: electric welding machine insulation damage shell electric welding machine, welding machine shell is directly connected with the earth enclosure grounding line constitutes a short circuit loop not arrowed dotted line (pictured above), the short circuit current will make the power protection device (automatic switch, fuse, or fuse) action, make the welding machine power off. The power cut off before, even if someone contact welding machine shell, because of the enclosure grounding line resistance is almost zero, almost no current through the body, also can protect the personal safety.
1, into the metal container, underground, when the place such as cooking, it is strictly prohibited to electric welding machine and line of lighting lamp transformer into, to prevent a voltage caused by electric shock accident.
2, especially when replacing welding during operation must be in accordance with the provisions, electric welding wear insulating gloves.
3, in damp environment work should wear insulated shoes, or standing on the dry wood. Uniform, work shoes, gloves to keep dry, to guarantee the insulation cant be reduced.
4, removed the power cord, and eliminate the welding machine fault, welder and welder remember turn the power switch off leaving the scene.
5, welding operation field line should be used when insufficient lighting the lamp, it is prohibited to use 220 v lights, rows in wet or humid environment or metal container to use shall not exceed 12 v lamp voltage.
6, rain and snow day must be conducted in the outdoor open-air welding work, be sure to rain and snow prevention measures, such as the canopy, etc.), to prevent the rain got wet welding machine, wire and holder, causing leakage injuries.
