Explosion-proof  motor selection is mainly based on the technical requirements of  machinery and equipment to carry out, such as the nature of the load,  the production process, power supply, power, speed, use of the  environment and installation and maintenance; second is the economy, to  consider explosion-proof motor prices, construction costs And operating costs, choose a cost-effective explosion-proof motor manufacturers.
   The  choice of the protection class of the motor shell is directly related  to the safety of the person's safety and the reliable operation of the  equipment. In the course of daily operation, it should be used to  prevent the human body from touching the dangerous parts inside the  motor and prevent the solid foreign body from entering the case. Into the shell to cause harmful effects on the motor.
   The  motor housing protection rating consists of the letter IP plus two  characteristic digits, the first characteristic numeral represents the  anti-solid, and the second characteristic digit indicates the liquid. For  example, IP44, the first feature is a motor that is 1mm solid, to  prevent the diameter or thickness of more than 1mm of the wire or  straight to touch or close to the cabinet within the charged or rotating  parts, the second feature is the splash , The motor can withstand any direction of splashing water should be no harmful effects. Like  IP23, the first feature that the protection of more than 12mm solid  into the motor, to prevent the fingers or the length of not more than  80mm similar objects touch or close to the shell charged or rotating  parts, to prevent more than 12mm solid foreign body into the case, The  second characteristic figure indicates that there is no detrimental  effect on the drip drip motor, that is, dripping within 60 ° of the  vertical line. The larger the number of the above features, the higher the protection level of the motor housing. The most commonly used protection class for motor applications is IP11, IP21, IP22, IP23, IP44, IP54, IP55

   From the current  perspective, China's enterprises in the explosion-proof motor selection  has two major shortcomings: First, short-sighted, just look at the motor  price, do not consider the comprehensive benefits, short-term behavior  is particularly serious; Second, greedy big ocean, do not consider the  actual working conditions , Often "big horse car",  overcapacity, etc., making the motor load rate is low, resulting in low  efficiency of the motor, energy waste serious. The protection level of the motor is getting higher and higher, from "IP23", "IP44" to "IP54" and "IP55" or even "IP65".
    China's  current large-scale Y (IP44), Y2 (IP54), Y3 (IP55) series of  asynchronous motors, mostly used in dry, clean industrial and mining  enterprises, in addition to flammable and explosive gases, dust,  moisture and other special circumstances , The actual use of "IP23" level of protection on it, there is no need to use a higher level of protection. Therefore,  the development of IP23 series of high-efficiency motor to replace IP44  or IP55 and other ordinary asynchronous motor, both to adapt to the  world's high-performance motor development trends, but also in line with  China's actual situation, not only cost savings, but also easy to  promote the application.