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IEC 60112-2020 pdf free

IEC 60112-2020 pdf free.Method for the determination of the proof and the comparative tracking indices of solid insulating materials.
This test method evaluates the composition of the material as well as the surface of the material being evaluated. Both the composition and surface condition directly influence the results of the evaluation and are considered when using the results in material selection process.
Test results are not directly suitable for the evaluation of safe creepage distances when designing electrical apparatus.
NOTE 2 This is in compliance with IEC 60664-1. Insulation coordination for equipment within low-voltage systems — Part 1: Principles, requirements and tests.
NOTE 3 This test discriminates between materials with relatively poor resistance to tracking, and those with moderate or good resistance, for use in equipment which can be used under moist conditions. More severe tests of longer duration are available for the assessment of performance of materials for outdoor use, utilizing higher voltages and larger test specimens (see the inclined plane test of IEC 60587). Other test methods such as the Inclined method can rank materials In a different order from the drop test given in this document.
This basic safety pub’ication focusing on a safety test method is primarily intended for use by technical committees in the preparation of safety publications in accordance with the principles laid down in IEC Guide 104 and ISOIIEC Guide 51.
One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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.
ISO 4287. Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms, definitions and surface texture parameters
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://wwwelectropedia.org
• ISO Online browsing platform: available at http:Iiwww.iso.org/obp
3.1 tracking progressive formation of conducting paths, which are produced on the surface and/or within a solid insulating material, due to the combined effects of electric stress and electrolytic contamination
3.2 tracking failure failure of insulation due to tracking between conductive parts
Note 1 to entry: In the present test, tracking is indicated by operation of an over-current device due to the passage of a current across the test surface and/or within the specimen.
3.3 electrical erosion wearing away of insulating material by the action of electrical discharges
3.4 air arc arc between the electrodes above the surface of the specimen
3.5 comparative tracking index CTI numerical value of the maximum voltage (in V) at which five test specimens withstand the test period for 50 drops without tracking failure and without a persistent flame occurring and including also a statement relating to the behaviour of the material when tested using 100 drops (see 11.3).IEC 60112 pdf free download.

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