AS NZS IEC 60840 pdf download

AS NZS IEC 60840 pdf download,Power cables with extruded insulation and their accessories for rated voltages above 30 kV (U m  = 36 kV) up to 150 kV (U m  = 170 kV)
1 Scope
This document specifies test methods and requirements for power cable systems, cables alone and accessories alone, for fixed installations and for rated voltages above 30 kV (U m = 36 kV) up to and including 1 50 kV (U m = 1 70 kV). The requirements apply to single-core cables and to individually screened three-core cables and to their accessories for usual conditions of installation and operation, but not to special cables, such as submarine cables and their accessories, for which modifications to the standard tests or the setup of special test conditions can be necessary. This document does not cover transition joints between cables with extruded insulation and paper insulated cables.
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 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 3.2 Definitions concerning tests 3.2.1 routine test test made by the manufacturer on each manufactured component (length of cable or accessory) to check that the component 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 or accessory, 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 system or cable or accessory covered by IEC 60840, 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 materials, design or type of manufacturing process of cable or accessory which might change the performance characteristics.
3.2.4 prequalification test test made before supplying on a general commercial basis a type of cable system covered by IEC 60840, in order to demonstrate satisfactory long-term performance of the complete cable system 3.2.5 extension of prequalification test test made before supplying on a general commercial basis a type of cable system covered by IEC 60840, in order to demonstrate satisfactory long-term performance of the complete cable system, taking into account an already prequalified cable system 3.2.6 electrical test after installation test made to demonstrate the integrity of the cable system as installed Note 1 to entry: Integrated optical elements, if present, will be tested upon customer request. Tests to be defined on agreement between customer and manufacturer. 3.3 Other definitions 3.3.1 cable system cable with installed accessories including components used for thermo-mechanical restraint of systems limited to those used for terminations and joints only 3.3.2 nominal electrical stress electrical stress calculated at U 0 using nominal dimensions Note 1 to entry: The equations for calculation of the stresses are given in Clause 6 n). Note 2 to entry: Nominal electrical stress is expressed in kV/mm. 3.3.3 combined design CD metal screen design that combines radial watertightness and electrical properties Note 1 to entry: Details of the construction are given in 4.3.