The motor as a driving equipment is currently widely used, in order to ensure the safe operation of the motor, according to the motor rated voltage, rated current, rated power and other parameters, will be equipped wi...The motor as a driving equipment is currently widely used, in order to ensure the safe operation of the motor, according to the motor rated voltage, rated current, rated power and other parameters, will be equipped with different protection devices, and the low-voltage motor comprehensive protection device in chemical plants, power plants and other factories and mines have been widely applied. The safety and stable operation of the motor is directly related to the safe and stable operation of the factory and mine, so the correct input and reliable action of the motor protection is particularly important. Shake power is a commonly known as voltage fluctuation, voltage drop and short interruption. Especially in the thunder rainy season, because the lightning strike will cause different degrees of power grid fluctuations, voltage amplitude mutation, waveform distortion, directly affect the quality of power supply, many times will cause motor trip. Based on the field simulation test, this article analyzes the action of the motor control circuit of the low voltage motor protector in the process of shaking, analyzes the causes of the electric trip, and puts forward certain solutions to reduce the trip rate of the equipment, which is of great significance to ensure the safe and stable operation of the plant and mine.展开更多
文摘The motor as a driving equipment is currently widely used, in order to ensure the safe operation of the motor, according to the motor rated voltage, rated current, rated power and other parameters, will be equipped with different protection devices, and the low-voltage motor comprehensive protection device in chemical plants, power plants and other factories and mines have been widely applied. The safety and stable operation of the motor is directly related to the safe and stable operation of the factory and mine, so the correct input and reliable action of the motor protection is particularly important. Shake power is a commonly known as voltage fluctuation, voltage drop and short interruption. Especially in the thunder rainy season, because the lightning strike will cause different degrees of power grid fluctuations, voltage amplitude mutation, waveform distortion, directly affect the quality of power supply, many times will cause motor trip. Based on the field simulation test, this article analyzes the action of the motor control circuit of the low voltage motor protector in the process of shaking, analyzes the causes of the electric trip, and puts forward certain solutions to reduce the trip rate of the equipment, which is of great significance to ensure the safe and stable operation of the plant and mine.
