Maintenance of electrical machinery and machinery 1 Observation carefully. The abnormal phenomena that can be found through eye observation are: rupture, disconnection; deformation (expansion, contraction, bending); looseness; oil leakage, water leakage, air leakage; dirty; corrosion; wear; discoloration (burning) Coke, silica gel discoloration, oil blackening); smoke (generating sparks); impurities and foreign bodies; abnormal actions, etc.
Maintenance of electrical machinery and machinery 2 The ear-listen-nose-sniffing equipment vibrates and emits unique sounds due to the action of alternating current, and shows a certain regularity. If you listen to these sounds carefully and master the characteristics of the sound changes, you can judge whether the equipment is operating normally through its high and low rhythm, timbre change, volume strength, and whether it is accompanied by noise.
Most people can smell the unique burnt odor of the insulating material of electrical equipment due to overheating and can accurately distinguish it. When the staff on duty enters the power distribution room to inspect the electrical equipment, if they smell the odor caused by the overheating of the equipment or the burning of the insulating materials, they should start the inspection to see if there is any smoke or discoloration, and listen for any discharge. The sound of flashover, until the cause is found. Smelling is also a more sensitive way to distinguish certain abnormalities and defects of electrical equipment.
Electrical machinery 3 Touch with hands. Operators can touch the inspected equipment with their hands to judge the defects and abnormalities of the equipment. It should be emphasized that it is absolutely forbidden to touch and test live high-voltage equipment by hand. Through hand touch, you can feel the temperature change and vibration of the equipment, such as the temperature change of the transformer, local heating; the heating and vibration of the relay, etc., can all be checked by the touch method.
Electrical and mechanical maintenance 4 Understanding the operating status The equipment maintenance personnel should learn from the operating personnel the operating status of the equipment, the weather changes at the time of the failure, the size of the load, the record of similar failures in the past and the solutions. Through these "questions", the most basic situation of equipment operation can be grasped quickly, which is convenient for maintenance personnel to quickly and completely deal with the accident, avoiding the misunderstanding of the accident search work and prolonging the power outage time and expanding the scope of the accident.