IEC 60502-1:2021 pdf download

IEC 60502-1:2021 pdf download.Power cables with extruded insulation and their accessories for rated voltages from 1 kV (U m = 1,2 kV) up to 30 kV (U m = 36 kV)
1 Scope
This part of IEC 60502 specifies the construction, dimensions and test requirements of power cables with extruded solid insulation for rated AC voltages of 1 kV (U = 1,2 kV) and 3 kV m (U m = 3,6 kV) for fixed installations such as distribution networks or industrial installations. Cables of rated AC voltage 1 kV (U = 1,2 kV) designed and tested in accordance with this m document can also be used, if declared by the manufacturer, in DC distribution systems having their nominal voltage ≤ 750 V DC (with a maximum of 900 V DC) between a live conductor and neutral/earth , or ≤ 1 500 V DC (with a maximum 1 800 V DC) between two live conductors. Applicable core identification for DC systems are considered in accordance with local installation regulations. NOTE 1 Recommendations for preferred core colours for line conductors in DC systems are given in IEC 60445. However, local installation regulations for DC systems can already contain specific identification requirements. This document includes cables which exhibit properties of reduced flame spread, low levels of smoke emission and halogen-free gas emission when exposed to fire. Cables for special installation and service conditions are not included, for example cables for overhead networks, the mining industry, nuclear power plants (in and around the containment area), submarine use or shipboard application, or cables directly connected to photovoltaic systems. NOTE 2 Cables for photovoltaic systems are covered by IEC 62930.
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 Definitions of dimensional values (thicknesses, cross-sections, etc.) 3.1.1 nominal value value by which a quantity is designated and which is often used in tables Note 1 to entry: Usually, in this document, nominal values give rise to values to be checked by measurements taking into account specified tolerances. 3.1.2 approximate value value which is neither guaranteed nor checked but is used, for example, for the calculation of other dimensional values 3.1.3 median value when several test results have been obtained and ordered in an increasing (or decreasing) succession, middle value if the number of available values is odd, and mean of the two middle values if the number is even 3.1.4 fictitious value value calculated in accordance with the “fictitious method” described in Annex A 3.2 Definitions relating to tests 3.2.1 routine test test made by the manufacturer on each manufactured length of cable to check that each length meets the specified requirements 3.2.2 sample test test made by the manufacturer on samples of completed cable or components taken from a completed cable, at a specified frequency, so as to verify that the finished product meets the specified requirements 3.2.3 type test test made before supplying, on a general commercial basis, a type of cable covered by this document, in order to demonstrate satisfactory performance characteristics to meet the intended application Note 1 to entry: Type tests are of such a nature that, after they have been made, they need not be repeated, unless changes are made in the cable materials or design or manufacturing process which might change the performance characteristics. 3.2.4 electrical test after installation test made to demonstrate the integrity of the cable and its accessories as installed