The cause of the three-phase asynchronous motor burn machine

The cause of the three-phase asynchronous motor burn machine can be divided into; Load, power supply, electrical insulation, lack of phase Power supply: add load under the condition of rated voltage is too low, current increase, motor overheating. The power supply voltage is too high, burning machine. Or motor open phase running. This kind of situation is less, is easy to determine, mainly the line with traces www.dongfeng-motor.com of burning. Load) : more than load operation, leading to a motor fever. Or frequent motor start, causing the motor overheating. This opportunity to burn motor will be blackened on both ends of the inner stator, the blackened parts was homogeneous (general motors has a fixed operating power, three phase generator call it the rated power and unit for tile, if under certain circumstances make up more than the actual use of power of the motor rated power, has described the phenomenon as motor overload). Insulation: motor internal insulation does not accord with a standard, existence and turn-to-turn short circuit. Or internal wiring error. This burning machine and sometimes confusing overload burning machine, stator can also be blackened, but in the short circuit parts will have obvious burn marks, such as copper lutetium will appear sometimes. The local severe burn winding. Lacks burning machine is: 1, the motor is star (Y) connection: there are two phase winding will burn, can use a megger (shaking table) to measure the two phase winding insulation damage. In short: if the motor is because of lack of phase and to burn, there will be a winding is not burned, if because of the heavy load and motor burn is full of three-phase motor winding insulation damage. 2, the motor is delta connection: will burn off only one phase winding, can use a megger (shaking table) to measure the phase winding 8500w gasoline generator insulation damage.