IEC 62262-2002 pdf – Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code).
1 Scope This standard refers to the classification of the degrees of protection provided by enclosures against external mechanical impacts when the rated voltage of the protected equipment is not greater than 72,5 kV. This standard is only applicable to enclosures of equipment where the specific standard establishes degrees of protection of the enclosure against mechanical impacts (expressed in this standard as “impacts”). The object of this standard is to give a) the definitions for the degrees of protection provided by enclosures of electrical equipment as regards protection of the equipment inside the enclosure against harmful effects of mechanical impacts; b) the designations for the degrees of protection; c) the requirements for each designation; d) the tests to be performed to verify that the enclosure meets the requirements of this standard. It will remain the responsibility of individual technical committees to decide on the extent and manner in which the classification is used in their standards and to define the “enclosure” as it applies to their equipment. However, it is recommended that, for a given classification, the tests do not differ from those specified in this standard. If necessary, complementary requirements may be included in the relevant product standard. For a particular type of equipment a product committee may specify different requirements provided that at least the same level of safety is ensured. This standard deals only with enclosures that are in all other respects suitable for their intended use as specified in the relevant product standard and which from the point of view of materials and workmanship ensure that the claimed degrees of protection are maintained under the normal conditions of use. This standard is also applicable to empty enclosures provided that the general test requirements are met and that the selected degree of protection is suitable for the type of equipment.
2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050(826):1982, International Electrotechnical Vocabulary – Chapter 826: Electrical installations of buildings IEC 60068-1:1988, Environmental testing – Part 1: General and guidance IEC 60068-2-75:1997, Environmental testing – Part 2: Tests – Test Eh: Hammer tests 3 Definitions For the purpose of this standard, the following definitions apply: 3.1 enclosure 1 part providing protection of equipment against certain external influences and, in any direction, protection against contact [IEV 826-03-12] NOTE This definition from the existing International Electrotechnical Vocabulary (IEV) needs the following explanations under the scope of this standard: a) enclosures provide protection of equipment against harmful effects of mechanical impacts; b) barriers, shapes of openings or any other means – whether attached to the enclosure or formed by the enclosed equipment – suitable to prevent or limit the penetration of the specified test probes are considered as a part of the enclosure, except when they can be removed without the use of a key or tool. 3.2 degree of protection against mechanical impacts the extent (level) of protection of the equipment provided by an enclosure against harmful mechanical impacts and verified by standardised test methods 3.3 IK code coding system to indicate the degree of protection provided by an enclosure against harmful external mechanical impacts
4.3 Application of the IK code In general, the degree of protection applies to the complete enclosure. If parts of the enclosure have differing degrees of protection, the latter shall be indicated separately. 4.4 Marking In cases where the relevant product committee decides that the marking of the IK-code shall be required, the marking requirements shall be detailed in the relevant product standard. Where appropriate, such a standard should also specify the method of marking which is to be used when – one part of an enclosure has a different degree of protection to that of another part of the same enclosure, – the mounting position has an influence on the degree of protection. 5 General requirements for tests 5.1 Atmospheric conditions for tests Unless otherwise specified in the relevant product standard, the test shall be carried out under the standard atmospheric conditions for tests described in IEC 60068-1: – temperature range: 15 °C to 35 °C, – air pressure: 86 kPa to 106 kPa (860 mbar to 1 060 mbar). When the altitude at which the test is performed is higher than 2 000 m, the height of fall shall be adjusted where necessary to result in the specified impact energy. 5.2 Enclosures under test Each enclosure under test shall be in a clean and new condition, complete with all its parts in place unless otherwise specified in the relevant product standard.