IEC 62930:2017 pdf download

IEC 62930:2017 pdf download.Electric cables for photovoltaic systems with a voltage rating of 1,5 kV DC
1 Scope
This document applies to single-core cross-linked insulated power cables with cross-linked sheath. These cables are for use at the direct current (DC) side of photovoltaic systems, with a rated DC voltage up to 1 ,5 kV between conductors and between conductor and earth. This document includes halogen free low smoke cables and cables that can contain halogens. The cables are suitable to be used with Class II equipment as defined in IEC 61 1 40. The cables are designed to operate at a normal continuous maximum conductor temperature of 90 °C. The permissible period of use at a maximum conductor temperature of 1 20 °C is limited to 20 000 h. NOTE The expected period of use under normal usage conditions as specified in this document is at least 25 years.
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. IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady state IEC 6021 6-1 , Electrical insulating materials – Thermal endurance properties – Part 1: Ageing procedures and evaluation of test results IEC 6021 6-2, Electrical insulating materials – Thermal endurance properties – Part 2: Determination of thermal endurance properties of electrical insulating materials – Choice of test criteria IEC 60227-2:1 997, Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V – Part 2: Test methods IEC 60245-2:1 994, Rubber insulated cables – Rated voltages up to and including 450/750 V – Part 2: Test methods IEC 60228:2004, Conductors of insulated cables IEC 60332-1 -2:2004, Tests on electric and optical fibre cables under fire conditions – Part 1-2: Test for vertical flame propagation for a single insulated wire or cable – Procedure for 1 kW pre-mixed flame
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.3.1 type test T tests required to be carried out before supplying a type of cable covered by IEC 62930 on a general commercial basis, 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, design or type of manufacturing process which might change the performance characteristics. 3.2 sample test S tests carried out on samples of completed cable, or components taken from a completed cable adequate to verify that the finished product meets the design specifications 3.3 routine test R tests carried out on all production cable lengths to demonstrate their integrity 3.4 halogen free material material containing no more than a defined impurity level of halogens
4 Rated voltage
The cables specified by this document are in particular designed for use at the direct current (DC) side of photovoltaic-systems, with a rated DC voltage up to 1 ,5 kV between conductors as well as between conductor and earth. Annex A provides further guidance on voltage ratings.
5 Requirements for the construction of cables
5.1 Conductors 5.1 .1 Material The conductors shall be copper, and in accordance with IEC 60228. The wires of conductors shall be tin coated. The wires shall be covered with a continuous layer of tin coating. There shall be no visible gaps in the continuous layer, when examined with normal or corrected vision.5.1 .2 Construction The class of the conductor shall be Class 5 in accordance with IEC 60228 for cable that is directly connected to PV modules. Class 2 conductors are allowed for cables intended for fixed installation and not directly connected to the PV modules. The nominal cross-sectional areas for each conductor class are given in Table 1 . 5.1 .3 Separator between conductor and insulation A non-metallic separator may be applied between the conductor and the insulation. If a non-metallic separator is applied in a halogen free low smoke cable, it shall be halogen free.