EN IEC 60034-5 pdf download.ROTATING ELECTRICAL MACHINES – Part 5: Degrees of protection provided by the integral design of rotating electrical machines (IP code) – Classification
1 Scope
This part of IEC 60034 applies to the classification of degrees of protection provided by enclosures for rotating electrical machines. It defines the requirements for protective enclosures that are in all other respects suitable for their intended use and which, from the point of view of materials and workmanship, ensure that the properties dealt with in this document are maintained under normal conditions of use. This document does not specify degrees of protection against mechanical damage of the machine, or conditions such as moisture (produced for example by condensation), corrosive dust and vapour, fungus or vermin. This document is also applicable to explosion proof machines, but it does not specifiy the types of protection for use in a potentially explosive (dust, gas) environment. Those are defined in the IEC 60079 series of standards. In certain applications (such as agricultural or domestic appliances), more extensive precautions against accidental or deliberate contact may be specified. This document gives definitions for standard degrees of protection provided by enclosures applicable to rotating electrical machines as regards the: a) protection of persons against contacts with or approach to live parts and against contact with moving parts (other than smooth rotating shafts and the like) inside the enclosure and protection of the machine against ingress of solid foreign objects; b) protection of machines against the harmful effects due to ingress of water; c) protection of machines against the harmful effects due to ingress of dust. It gives designations for these protective degrees and tests to be performed to check that the machines meet the requirements of this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: • IEC Electropedia: available at http://www.electropedia.org/ • ISO Online browsing platform: available at http://www.iso.org/obp 3.1 closed machine machine where no medium from the surrounding medium, for the purpose of cooling, passes through the machine [SOURCE: IEC 60050-41 1 :1 996, 41 1 -44-1 7] 3.2 open machine machine with an open cooling circuit in which the coolant is drawn directly from the surrounding medium passing through the machine and then returning directly to the surrounding medium [SOURCE: IEC 60050-41 1 :1 996, 41 1 -44-1 6]
4 Designation
4.1 General The designation used for the degree of protection consists of the letters IP followed by two characteristic numerals signifying conformity with the conditions indicated in the tables of Clauses 5 and 6 respectively. 4.2 Single characteristic numeral When it is required to indicate a degree of protection by only one characteristic numeral, the omitted numeral shall be replaced by the letter X, for example IPX5 or IP2X. 4.3 Supplementary letters 4.3.1 Additional information may be indicated by a supplementary letter following the second characteristic numeral. If more than one letter is used, the alphabetic sequence shall apply. 4.3.2 In special applications (such as machines with open circuit cooling for ship deck installation with air inlet and outlet openings closed during standstill), numerals may be followed by a letter indicating whether the protection against harmful effects due to ingress of water was verified or tested for the machine not running (letter S) or the machine running (letter M). In this case, the degree of protection in either state of the machine shall be indicated, for example IP55S/IP20M. The absence of the letters S and M shall imply that the intended degree of protection will be provided under all normal conditions of use. 4.3.3 For air-cooled open machines suitable for specific weather conditions and provided with additional protective features or processes (as specified in Clause 1 1 ), the letter W may be used.
EN IEC 60034-5 pdf download
