New or long-lasting unused electric welding machines often reduce the insulation resistance between the windings and between the windings and the casing due to moisture, and are prone to short-circuit and grounding at the beginning of use, resulting in equipment and personal accidents. Therefore, use a shaker to check whether the insulation resistance is qualified before use. Before starting a new electric welding machine, check whether the contactor of the electrical system is in good condition. If it is considered normal, start a test run under no load.
Only when it is proved that there is no electrical hazard, can it be tested under load, and finally it can be put into normal operation. The DC welding machine should be rotated according to the regular direction. Regarding the fan with a fan, pay attention to whether the fan rotates in the correct direction. It should be blown out from above. In order to achieve the purpose of cooling the welding machine.
