The common protection levels of motors are IP23, IP44, IP54, IP55, IP56, and IP65. What is the meaning of the IP rating of these motors? What is the significance of the motor protection level? And the difference between explosion-proof motors and ordinary motors? Dalan Motor Xiaobian brought everyone to discuss this series of questions.
(1) Detailed explanation of the motor protection level
The IP classification system uses a number to indicate protection of the enclosure against shock and dust and water intrusion. The protection level of the oil pump motor adopts the IP×× level standard recommended by the International Electrotechnical Commission (IEC). The installation level is different for different installation places. The IP (INGRESS PROTECTION) protection level system is drafted by IEC (INTERNATIONAL ELECTROTECHNICAL COMMISSION). The appliance is classified according to its characteristics of dustproof and moisture proof. The IP protection level is composed of two numbers. The first number indicates the level of the lamp from dust and the intrusion of foreign objects. The second number indicates the degree of airtightness of the lamp against moisture and water intrusion. The larger the number, the more the protection level is. high. The "IP44" can be selected by referring to the following description. In the grading standard, “×׆is a two-digit number, the first position indicates the degree of protection against solids, and the second position indicates the degree of protection against liquids. The solid protection grade has 7 grades, which are represented by 0-6 respectively; the liquid protection grade has 9 grades, which are represented by 0-8 respectively. The specific description is as follows: the meaning of the first digit after the motor protection level IP is 0. There is no protection, no special protection.
1. It can prevent solid foreign objects with a diameter larger than 50MM from entering the casing, which can prevent a large area (such as a hand) of the human body from accidentally touching the charged or moving parts of the casing, but cannot prevent conscious access to these parts.
2. It can prevent solid foreign objects with a diameter larger than 12MM from entering the casing, which can prevent the fingers from touching the charged or moving parts of the casing.
3. It can prevent solid foreign objects with a diameter larger than 2.5MM from entering the casing, and can prevent tools, metals, etc. with a thickness (or diameter) greater than 2.5 from touching the live or moving parts of the casing.
4. It can prevent solid foreign objects with a diameter larger than 1MM from entering the casing, which can prevent tools, metals, etc. with thickness (or diameter) greater than 1MM from touching the live or moving parts of the casing.
5, can prevent dust from entering the level of affecting the normal operation of the product, completely prevent access to the live or moving parts of the shell.
6, completely prevent dust from entering, completely prevent access to the live or moving parts of the shell. The meaning of the second digit after the motor protection class IP: 0 means no protection, no special protection. 1 means anti-drip, vertical dripping should not directly enter the inside of the product. 2 15 ã‚š indicates anti-drip, and dripping water within a range of 15 degrees from the plumb line should not directly enter the inside of the product. 3 means anti-watering, and the water in the range of 60 degrees from the vertical line should not directly enter the product. 4 is splash-proof, splashing water in any direction should have no harmful effects on the product. 5 is water-proof, water spray in any direction should have no harmful effects on the product. 6 is that violent waves or strong water spray should have no harmful effects on the product.
7. Immersion prevention, the product is immersed in water under the specified time and pressure, and the water intake should have no harmful effects on the product.
8. Diving, the product is immersed in water for a long time under the specified pressure, and the water intake should have no harmful effect on the product. For example: Ip68: This 6 says that dust can't enter (no dust). This 8 says that the waterproof is the highest level. This level of three-phase asynchronous motor is completely sealed, and it works fine under water.
(2) The difference between explosion-proof motors and ordinary motors:
1. Explosion-proof motors are generally used in flammable and explosive places.
2. The seal of the explosion-proof motor junction box is better than the ordinary motor.
3, the explosion-proof motor protection level is at least IP55, and the ordinary motor has IPIP23, IP44, IP54, IP55, IP56, so it can be distinguished from the shape.
It is also widely used in textile, metallurgy, city gas, transportation, grain and oil processing, papermaking, medicine and other departments. Explosion-proof motors are used as the main power equipment and are commonly used to drive pumps, fans, compressors and other transmission machinery.
With the development of science and technology and production, the places where there is a danger of explosion are also increasing. For example, edible oil production used to be a traditional pressing process. After the 1970s, China began to introduce advanced foreign leaching oil processes. However, chemical solvents containing hexane were used in this process. Hexane is flammable and explosive. Substance; therefore, the leaching oil plant becomes a dangerous place for explosions, requiring the use of explosion-proof motors and other explosion-proof electrical products. In another example, in recent years, China's highways have developed rapidly, and a large number of fuel gas stations have emerged, which has also provided a new market for explosion-proof motors.
Product Categories
1, according to the principle of the motor
Can be divided into explosion-proof asynchronous motor, explosion-proof synchronous motor and explosion-proof DC motor.
2, according to the place of use
It can be divided into explosion-proof motors for underground coal mines and explosion-proof motors for factories.
3, according to the principle of explosion protection
Can be divided into explosion-proof motors, increased safety motors, positive pressure motors, non-sparking motors and dust explosion-proof motors.
4, according to the matching host points
It can be divided into explosion-proof motor for coal mine transport machine, explosion-proof motor for coal mine winch, explosion-proof motor for rock loader, explosion-proof motor for coal mine partial fan, explosion-proof motor for valve, explosion-proof motor for fan, marine explosion-proof motor, explosion-proof motor for lifting metallurgy And the hydrogenation device is equipped with an increased safety type brushless excitation synchronous motor. In addition, it can also be divided according to technical indexes such as rated voltage and efficiency, such as high-voltage explosion-proof motor, high-efficiency explosion-proof motor, high slip rate explosion-proof motor and high starting torque explosion-proof motor.
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
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