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IP Degrees of Protection

IP (International Protection) is a term defined by DIN VDE 0470 and DIN 40 050. These standards describe the classification of degrees of protection provided by housing for electrical equipment with rated voltages not exceeding 72.5 kV. They specify the following:
  1. Protection of persons.
  2. Protection of electrical equipment against the penetration of solid matter, including dust.
  3. Protection of electrical equipment against the harmful effects of water.

Explanation of IP Codes

An IP code consists of the letters "IP" and two digits. The first digit is 0...6 and the second 0...9 or 9k.

Note: The usual degrees of protection specified for food-industry components are IP 65 (protected against dust and jets of water) and IP 67 (dust-proof and unaffected by temporary immersion in water). The choice of IP 65 or IP 67 depends on the application in question and the various test criteria which apply. IP 67 is not automatically better than IP 65. A component which fulfils the IP 67 criteria will therefore not automatically also meet the criteria for IP 65.

Degrees of protection against the infiltration of impurities Degrees of protection against the damaging effects of water
1st Digit Brief Description Definition
0 No protection -
1 Protection against particulate, 50 mm and larger The probe (a sphere with a diameter of 50 mm) may not fully penetrate the enclosure.
2 Protection against particulate, 12.5 mm and larger The probe (a sphere with a diameter of 12.5 mm) may not fully penetrate the enclosure.
3 Protection against particulate, 2.5 mm and larger The probe (a sphere with a diameter of 2.5 mm) may not fully penetrate the enclosure.
4 Protection against particulate, 1.0 mm and larger The probe (a sphere with a diameter of 50 mm) may not penetrate the enclosure at all.
5 Protection against dust The infiltration of dust is not entirely eliminated. However, dust may not penetrate the enclosure to such an extent that satisfactory functioning of the device or safety is impaired.
6 Dust-proof No dust infiltration
2nd Digit Brief Description Definition
0 No protection -
1 Protected against dripping water Vertically dripping water must not have any damaging effect.
2 Protected against dripping water with Vertically dripping water must not have any damaging effect with the enclosure inclined to an angle of up to 15° from the vertical in either direction.
3 Protected against spraying water Water sprayed at an angle of up to 60° from the vertical at either side of the enclosure must not have any damaging effect.
4 Protected against splash water Water splashed at the enclosure from any direction must not have any damaging effect.
5 Protected against water-jet streams Water-jet streams which make contact with the enclosure from any direction must not have any damaging effect.
6 Protected against high power water-jet streams High power water-jet streams which make contact with the enclosure from any direction must not have any damaging effect.
7 Protected against intermittent submersion in water Water may not enter the enclo-sure to such an extent that dam- aging effects become apparent, when the enclosure is intermit- tently submerged in water under standardized pressure and time conditions.
8 Protected against continuous submersion in water Water may not enter the enclo-sure to such an extent that dam- aging effects become apparent, when the enclosure is continuously submerged in water. Sub-mersion conditions must be agreed upon by the manufacturer and the user. However, the con-ditions must be more severe than those listed under code 7.
9 Protected against highly pressurised water and steam jet cleaning Highly pressurised water which is directed at the enclosure from any direction must not have any damaging effect.
 
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