Electric welding machine before use should be paid attention to what issues?

Electric welding machine of new or unused for a long time,often due to be single phase generator affected with damp be affected with damp between winding,winding and reduce insulation electric fan motor resistance between the casing and likely to occur at the beginning of the use of short circuit and grounding,equipment and personal accident. So before using shaking table to check whether the insulation resistance of qualified application.Before starting a new welder,should check electrical system contactor parts are in good condition,think after normal,may be started under no-load test run. IE2/IE3 electric motor Prove that no electrical hazards,after the load cases,finally can run normally.Dc arc welding machine should be wholesalemotor.blogspot.com in accordance with the direction of rotation,attention should be paid to the fan with the ventilator on direction of rotation is correct,blown out by the above should be used. In order to achieve the purpose of cooling welder.