SIMATIC ET 200 - For distributed automation solutions - November ...

© Siemens AG 2010Degrees of protectionIngress Protection (IP) is a classification for degrees of protectionwhich are defined in IEC 60529 and DIN 40050. Thestandards describe the classification of degrees of protectionby means of enclosures for electrical equipment. Theyapply for operator protection and against the ingress ofsolids and liquids.Nomenclature for degrees of protectionThe IP degree of protection is classified using code letters anda two digit number. The higher the two numbers, the betterthe protection.• The first IP digit represents protection against solid bodies.Foreign bodies of various particle sizes as small as dust aredistinguished here.• The second digit represents protection against water dropletsthat drip onto the equipment from different angles,spray water, water jets, and submersion of the equipmentin a liquid.Protection against the ingress of solid bodiesProtection against the ingress of water1. 2. Brief description Definition0 Not protected1 Protected against solid foreign bodies 50 mm The object probe, sphere of 50 mm , must not penetrate fully.2 Protected against solid foreign bodies 12.5 mm The object probe, sphere of 12.5 mm , must not penetrate fully.3 Protected against solid foreign bodies 2.5 mm The object probe, sphere of 2.5 mm , must not penetrate at all.4 Protected against solid foreign bodies 1 mm The object probe, sphere of 1 mm , must not penetrate at all.5 Dust protected The ingress of dust cannot be totally prevented. The dust must not penetratein such a quantity to affect satisfactory operation of the device or safety.6 Dust-proof No ingress of dust.0 Not protected1 Protected against dripping water Vertically falling drip water must not have a harmful effect.2 Protected against dripping water Vertically falling drip water must not have a harmful effect when the housingis inclined at up to 15° from the vertical to either side.3 Protected against spray water Water sprayed on both sides of the vertical at an angle of up to 60° must nothave a harmful effect.4 Protected against splash water Water spray from a hose which is directed on the enclosure must not have aharmful effect.5 Protected against water jets A water jet which is directed on the enclosure from any direction must nothave a harmful effect.6 Protected against intense water jets An intense water jet which is directed on the enclosure from any directionmust not have a harmful effect.7 Protected against harm from temporary submersion inwater8 Protected against harm from long-term submersion inwater9 Protected against water from high-pressure hoses andsteam cleaningWater must not enter in quantities that can cause damage when the casingis temporarily submerged in water under standardized pressure and timeconditions.Water must not enter in quantities that can cause damage when the casingis submerged in water for a long time. The conditions must be agreed betweenthe manufacturer and the user. The conditions must, however, bemore severe than for 7.Water directed at extremely high pressure onto the enclosure from all directionsmust not result in harmful effects.55