A high-voltage motor is a motor that operates at a power frequency of 50 Hz, a rated voltage of 3 kV, 6 kV, and a 10 kV AC three-phase voltage. Dalan Motor tells you that there are many classification methods for high-voltage motors: 1. Divided into small, medium, large and extra large according to the size of the capacity; 2. Divided into A, E, B, F, H, and C motors according to the insulation level. 3, according to the structure and use are divided into general-purpose high-voltage motors, special structures and applications of high-voltage motors. The high-voltage squirrel-cage three-phase asynchronous motor is built on the basis of electromagnetic induction. Under the action of high electromagnetic field and its own technical conditions and external environment and operating conditions, the motor will be produced within a certain period of operation. Various electrical and mechanical failures. The faults frequently occurring in high-voltage motors are as follows: 1. The insulation resistance of the motor is low, the insulation of the winding penetrates the grounding and the lead-out line is faulty. 1 Due to the humid environment, the insulation of the motor is damp, and the insulation resistance value does not meet the requirements of the regulations. 2 Due to the large dust, the magnetic The material falls on the surface of the coil, causing drilling phenomenon, which causes the insulation of the stator winding to be broken through to ground; 3 The position of the motor lead is in the hot air area at the back of the iron core, and the insulation heat is aging after long-term operation, and the rubber insulation of the lead wire is crisp, deteriorated and peeled off. External force and mechanical vibration cause the porcelain bottle to rupture or the motor leads to loosen, resulting in poor contact or even breakage of the motor lead-out line and severe arc discharge. 2. The stator wedge of the motor is loose, and the end of the binding is faulty. The stator wedge of the motor is loose and the end of the winding is poorly tied. When the motor starts to vibrate, the coil is relatively displaced, the electromagnetic noise of the motor is large, and the discharge phenomenon occurs. 3. Motor rotor failure 1 The effect of thermal effect force, electromagnetic force and mechanical centrifugal force generated by frequent motor start-up and overload operation causes alternating stress, which causes the short-circuit ring of the motor squirrel-cage rotor to be welded with the copper strip; 2 rotor copper strip Loose in the slot, the stator current swings during operation, the motor vibration is severe, the electromagnetic noise of the motor increases and the discharge phenomenon occurs. 4, motor bearing fault 1 bearing installation is not correct, the tolerance is too tight or too loose, the grease is not added properly. 2 When the bearing is running, the temperature rises too high, the vibration is large, and the sound at the bearing is abnormal, which makes a loud noise. 5, motor vibration failure due to manufacturing, use, improper maintenance or long running time, motor end caps, bearings, bearing sleeves, rotor journals, cages and stator cores and other components will wear deformation and loss should be Some shape accuracy and dimensional accuracy make the motor vibrate during operation. When the vibration value exceeds the standard, it will affect the health and safe operation of the equipment. ----- Responsible Editor: Dalan Oil Pump Motor 02- Purchasing Consultant Copyright http:/(Dalan Motor) Reprint, please indicate the source http://news.chinawj.com.cn
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