T/LWB 003-2019 10kV and 20kV overhead insulated cables

Scope

Main technical content: 7.2.3 The surface of the conductor shall be smooth, free from oil stains, and without damage to the shielding and insulation, such as burrs, sharp edges, and protruding or broken single wires. 7.2.4 When the conductor is twisted, the diameter ratio and twist direction shall comply with the provisions of GB/T 3956 and GB/T 1179. 7.2.5 When there are 7 or fewer single wires in the conductor, no joints are allowed in any of the single wires. When there are more than 7 single wires, joints are allowed in the single wires, but the distance between two joints on the finished twisted conductor shall be no less than 15m. 7.3 Shielding 7.3.1 Except for lightweight thin insulation structures, the surface of the conductor shall have a semi-conductive shielding layer. The semi-conductive material used for shielding the conductor may be cross-linked or non-cross-linked. The semi-conductive shielding layer shall be evenly coated on the conductor, with a smooth surface and no obvious twisting grooves. There shall be no sharp corners, particles, burnt or scratched marks. The thickness of the semi-conductive shielding layer can be referred to Table 3. The performance of the semi-conductive shielding material shall comply with the provisions of GB/T 14049.

Development Information

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