The insulation resistance between the windings and between the windings and the casing of the new or long-term unused electric welding machine is often greatly reduced due to moisture, and it is 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 the new welding machine, check whether the contactor part of the electrical system is in good condition. After thinking that it is normal, you can start the test run under no load.
When it is proved that there is no electrical hidden danger, the test run can be carried out under the load condition, and finally it can be put into normal operation. The DC welding machine should rotate in a regular direction. For those with a fan, pay attention to whether the fan rotates in the correct direction and should be blown out from above.
