Motor protector is an important component of power generation, power supply and power consumption system. It is a cross-industry, large-area, energy-saving product with remarkable effect.It permeates almost all areas of electricity use.Industry, agriculture and national defense, as well as the important guarantee of people's normal life, production and safety, play an irreplaceable important role in the national economy and energy conservation.In 2008, the output of motor protectors in China reached 65 million units, with a year-on-year growth of 15%.From 2009 to 2010, driven by the motor industry, the output of motor protectors in China repeatedly reached new highs, with year-on-year growth of 19% and 20%, reaching 77.3 million units and 92.7 million units respectively.

As an important part of the driving system, the motor protector 点击打开链接plays a pivotal role in the national economy. Its use has penetrated into almost all walks of life and is an important guarantee for the normal operation of industry, agriculture, national defense construction and people's life. Therefore, it is very important to ensure the normal operation of the motor.The motor protection device in China has experienced several stages, such as comprehensive imitation of The Soviet Union, self-design, renewal and intelligent development.It is worth mentioning that the development of microprocessor technology in recent years has provided a hardware platform for the intelligent and multi-functional development of motor protector, making motor protection enter a stage of rapid development.