Inspection method of linear vibrating screen motor
Gaozhuo Click 13-04-2020
Inspection method of linear vibrating screen motor
(1) observation method. Through the visual inspection of the winding end and insulation material in the groove to observe whether there is damage and blackened marks, if any, is the location.
(2) multimeter test. Use the multimeter to check the low resistance, the reading is very small, it is grounded
(3) megameter method. According to different grade choose different megameter to measure the insulation resistance of each set of resistance, if the reading is zero, that means the winding is grounded, but for the motor insulation damp or due to the accident and breakdown, need to be judged according to experience, generally speaking the pointer in the "0" when the wobble, can be considered to have a certain resistance value.
(4) lamp test method. If the lamp is on, the winding is grounded. If sparks or smoke are found somewhere, the grounding fault point is the winding. If the light is dim, the insulation has ground breakdown. If the lamp is not on, but when the test bar is grounded, there is also a spark, indicating that the winding has not been broken, but is seriously damp. Also can use hardwood to knock gently in the shell stop edge, knock to a certain place to wait for a extinguish a light, when the electric current is on and off, then the place is the place to receive
(5) current burn through method. With a voltage regulating transformer, connected to the power supply, the connection point soon heated, the insulation smoke is the connection point. Special attention should be paid to the small motor not more than twice the rated current, the time is not more than half a minute; Large motor for rated current 20%-50% or gradually increase the current, to the point of the first smoke immediately off.
(6) group elimination. For the connection site in the heart of the core and more severe burning, burned copper wire and iron core fused together. The method adopted is to divide the one phase winding of the grounding into two halves, and so on, to find the connection point
