IEC 60529 is the standard document of the International Electrotechnical Commission on the degree of protection of equipment in enclosures and enclosures. The so-called protection level uses a standardized test method to detect the proximity of the casing to dangerous parts, usually expressed by IP code.

The IP code is a coding system used to indicate the proximity of the casing to dangerous parts, the level of protection of the entry of external solid objects and the entry of water, and gives information about the degree of protection. The IP code is usually composed of four-digit code. For example IP23CH, where IP is the international protection code letter; 2 is the first characteristic number, indicating the degree of enclosure protection for access to dangerous parts and external solid targets, which can be represented by numbers from 0 to 6, without this feature Replace with X; 3 is the second characteristic number, indicating the protection of water immersion, which can be represented by a number from 0 to 8. If there is no such feature, X can be used instead; C is an additional letter indicating The degree of protection close to dangerous parts can be identified by four letters A, B, C, D, but this item can be ignored; H is a supplementary letter, which can be identified by four letters H, M, S, W, also Ignorable. In this article we focus on the first and second feature numbers in the IP code.

The first feature number can be identified by 0 to 6 seven digits. We can temporarily ignore the second feature number as well as additional and supplementary letters, and IP0X~IP6X. In the IEC60529 standard, there is a specific description for each level of protection: IP0X - no protection; IP1X - protection for external solids ≥ 50mm diameter; IP2X - protection for external solids ≥ 12.5mm; IP3X - protection for external solids ≥ 2.5mm diameter; IP4X - protection for external solids larger than 1.0mm diameter; IP5X - with dust protection; IP6X - with tight dust protection.

For the IEC60529 standard, dustproof testing is also involved in relevant international and domestic standards. For example, the general safety and requirements of IEC60598 luminaires are required to classify lamps according to dustproof and solid foreign objects. GB2423.37-89 Basics of electrical and electronic products The dust test method is mentioned in the environmental test procedure; GB/T4942.2-93 low-voltage electrical enclosure protection grade standard; GB7000.1-1996 and GB7001-1986 luminaire general requirements and test standards, these standards usually only require IP5X And IP6X test can be.

The second characteristic number can be identified by 0 to 8 nine digits. We also ignore the first digit and the additional letters and supplementary letters, ie IPX0~IPX8. In the IEC60529 standard, the description of the waterproof rating is as follows: IPX0 - no protection IPX1 - vertical low; IPX2 - drip (15 ° tilt); IPX3 - spray; IPX4 - splash; IPX5 - jet; IPX6 - powerful jet; IPX7 - temporary soak; IPX8 - Continuous soaking. Experimental water requirements are clean water. There are also recommendations in this standard for the purpose of the test, such as IPX1 and IPX2, which usually use a drip tank. IPX3 and IPX4 use oscillating tube or spray nozzle. The radius of the oscillating tube has 8 options according to the area of ​​the object to be tested. The minimum acceptable diameter is 200mm, and the maximum acceptable diameter is 1600mm, which is increased by 200mm. The number of openings on the top varies depending on the level. For example, in the IPX3 class, a 200mm tube radius can open 8 holes, while in the IPX4 class, a 200mm tube radius can open 12 holes. The IPX5 and IPX6 use water guns, but the inner diameters of the nozzles used for different grades are different. The inner diameter of the IPX5 nozzle is 6.3mm, the inner diameter of the IPX6 nozzle is 12.5mm, and the distance from the nozzle to the casing is 2.5m~3m. IPX7 and IPX8 are used. Semi-wetting device, IPX7 standard test time is 30MIN.

The IEC 60529 standard for waterproof testing is also used in relevant international standards. For example, the general safety and requirements of IEC60598 luminaires refer to the classification of luminaires according to the degree of waterproofing; the safety standards of IEC60335 household and similar electrical appliances and the grading standards for the overall structure of IEC60034-5:2000 rotating electrical machines are mentioned in the waterproof rating. Test.

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