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1、外壳防护等级(IP)仪表外壳防护等级(IP)代码(BS EN60529;1992),由字母IP和后续的两位特征数字表示。IP 外壳防护等级接近等于 NEMA 防护等级：第三位特征数字(附加)防机械冲击0无防护1冲击能量为0 . 22 5焦耳2冲击能量为0 . 37 5焦耳3冲击能量为0 . 5焦耳5冲击能量为2 . 0焦耳7冲击能量为6 . 0焦耳9冲击能量为20焦耳附加数字：防机械冲击第三位特征数字(至EN标准中不包括)，适合在某些欧 洲国家中通用(参阅法国标准NFC2 0-0 10)：第一位特征数字第二位特征数字防止固体异体异物进入防止进水造成有害影响0无防护0无防护1固体异物直径大于50
2、mm1垂直水滴2固体异物直径大于12mm2倾角75-90滴水3固体异物直径大于2.5mm3淋水4固体异物直径大于1.0mm4溅水5防尘5喷水6尘密6猛烈喷水例：7短时间浸水IP65即要求具有尘密及对喷水的外壳防护功能8连续浸水IP codesDegrees of Protection Provided by EnclosuresThis standard describes a system for classifying the degrees of protection provided by the enclosures of electrical equipment. Develope
3、d by the European Committee for Electrotechnical Standardization (CENELEC), these standards are designed to numerically rate an electrical product on the level of protection its enclosure provides. By assigning different number codes, the products degree of protection can be identified quickly and e
4、asily. In the code IP 54, for example, IP identifies this standard, the 5 describes the level of protection from solid objects, and 4 describes the level of protection from liquids.FirstDEGREE OF PROTECTION (First Number in Code)Characteristic NumeralBrief DescriptionDefinition0Not protected1Protect
5、ed against solid foreign objects of 50mm diameter and greater.The object probe, sphere of 50mm diameter, shall not fully penetrate.12Protected against solid foreign objects of 12.5mm diameter and greater.The object probe, sphere of 12.5mm diameter, shall not fully penetrate.13Protected against solid
6、 foreign objects of 2.5mm diameter and greater.The object probe, sphere of 2.5mm diameter, shall not penetrate at all.14Protected against solid foreign objects of 1mm diameter and greater.The object probe, sphere of 1mm diameter, shall not penetrate at all.15Dust-protectedIngress of dust is not tota
7、lly prevented, but dust shall not penetrate in a quantity to interfere with satisfactory operation of the apparatus or to impair safety.6Dust-tightNo ingress of dust.i The full diameter of the object shall not pass through an opening of the enclosureSecondCharacteristicNumeralDEGREE OF PROTECTION (S
8、econd Number in Code)Brief DescriptionDefinition0Not protected1Protected against vertically falling water drops.Vertically falling drops shall have no harmful effects.2Protected against vertically falling water drops when enclosure is titled up to 15 .Vertically falling drops have no harmful effects
9、 when the enclosure is tilted at any angle up to 15 on either side of the vertical.3Protected against spraying water.Water sprayed at an angle up to 60 degrees on either side of the vertical shall have no harmful effects.4Protected against splashing water.Water splashed against the enclosure from an
10、y direction shall have no harmful effects.5Protected against water jets.Water projected in jets against the enclosure from any direction shall have no harmful effects.6Protected against powerful water jets.Water projected in powerful jets against the enclosure from any direction shall have no harmfu
11、l effects.7Protected against the effects of temporary immersion in water.Ingress of water in quantities causing harmful effects shall not be possible when the enclosure is temporarily immersed 1 meter in water under standardized conditions of pressure and time.8Protected against the effects of conti
12、nuous immersion in water.Ingress of water in quantities causing harmful effects shall not be possible when the enclosure is continuously immersed in water under conditions which shall be agreed between manufacturer and the user, but are more severe than for number 7.International Protection (IP) Rat
13、ingsThe IP rati ng system classifies the degree of protecti on from solid objects and liquids afforded by electrical equipment and enclosures. Recognized in most Europea n coun tries and meets a nu mber of British and Europea n sta ndards, this rati ng system in cludes: Classificati on of Degrees of
14、 Protectio n Provided by Enclosures, BS (British Standards) 5490:1977; IEC (International Electrotechnical Commission) 529:1976.Specifications for Degrees of Protection of Enclosures of Switchgear and Con trol Gear for voltages up to and in clud ing 1000 VAC and 1200 VDC, BS 5420:1977; and IEC 144:1
15、963.Second NumberProtecti on aga inst liquidsFirst NumberProtecti on aga inst solid objects0 no protection0 no protection1 protected against solid objects up to 50 mm (e.g. accidental touch by hands)2 protected against solid objects up to 12 mm (e.g. fingers)3 protected against solid objects over 2.5 mm (e.g. tools and wires)4 protected against solid objects over 1 mm (e.g. tools and small wires)5 protected against dust-limited to ingress (no harmful deposits)NEMA definitionIECenclosureclass
