The degree of dust and moisture protection. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Electrician

The degree of dust and moisture protection. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Electrician's Handbook

Any electrical product must meet two simultaneously valid protection requirements:

safe handling of the device, i.e. safety for the operating personnel;
protection of the device located in the housing from environmental influences.

IP rating is not a standard in the general sense, but its convenience is recognized throughout the world, so engineers and designers use the IP standard for evaluation instead of referring to any specific national standards and approvals. When complying with the IP standard, it is not specified what a particular case is made of and for, and chemically non-aggressive, such as sand and water, are considered as environmental factors.

The IP standard does not stipulate protection against aggressive environments and other serious requirements for equipment: to put it simply, the IP standard gives the concept of dust and moisture protection of a product. So, let's see what protective properties characterize the numbers in the title of the standard.

First digit gives the concept of the protection of the product from human contact with current-carrying parts and from the penetration of foreign objects into the product.

First digit	Short title	Protection characteristic
0	No protection	Open design, no protection against dust, no protection of personnel from touching live parts
1	Protection against large objects	Protection against penetration into the structure of large objects with a diameter of more than 50 mm. Partial protection against accidental contact with current-carrying parts by a person (protection against contact with the palm of your hand)
2	Protection against medium-sized objects	Protection of the structure against penetration into objects with a diameter of more than 12 mm. Finger protection for live parts
3	Protection against small objects	The design does not allow penetration into objects with a diameter of more than 2,5 mm. Protection of personnel against accidental contact with current-carrying parts with a tool or fingers
4	Sand protection	Objects with a diameter of more than 1 mm cannot enter the structure. The design protects against touching current-carrying parts with fingers or a tool
5	Protection against dust accumulation	Dust may enter the enclosure in a small amount that does not interfere with the normal operation of the equipment. Complete protection against touching the live parts of the equipment
6	Complete dust protection	No dust can penetrate inside the structure

The second figure informs us about the degree of moisture protection of the product.

The second figure	Short title	Protection characteristic
0	No protection	No splash water protection
1	Protection against drops falling vertically	Drops of water falling vertically cannot cause dangerous consequences for the equipment
2	Drop protection at an angle	Drops of water falling on the equipment at an angle of up to 15 degrees do not cause dangerous consequences
3	Water splash protection	The product is protected from water splashes entering the structure at an angle of up to 60 degrees
4	Protected against splashing water from any direction	The design is protected from water splashes, which can be directed at the product from any direction
5	Water jet protection	Jets of water, e.g. from a hose, do not harm the equipment housed in the enclosure
6	Water flood protection	Filling the equipment with water does not cause damage to the equipment
7	Immersion protection	The case can be completely submerged in water, which does not damage the equipment housed in the case
8	Protected against immersion in pressurized water	The design withstands immersion in water to a certain depth without consequences (protection against water under pressure, and the pressure value is indicated specifically)

It is intuitively clear that the first digit (dust protection) should usually be higher than, or older than, the second digit (water protection).

Publication: electro.narod.ru

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