National standard JKLYJ-10kv-1 * 300 Shandong Jining overhead insulated wire manufacturer

Description :

　　 National standard JKLYJ-10kv-1 * 300 Shandong Jining overhead insulated wire manufacturer

　　Characteristics and uses of overhead insulated conductors:

　　 All aluminum 10kV overhead insulated conductor, in accordance with standard GB/T14049-2008

　　 Overhead insulated conductors, Aerial Insulation Line， An insulated wire made by twisting single or multiple layers of aluminum wire and extruding an insulation layer outside the wire. This type of wire is erected by a tower at a certain height to transmit power and is suitable for high and low voltage transmission and transformation overhead lines.

　　For the ground insulation of high-voltage transmission and distribution network overhead lines, air is generally used. In the past, distribution lines (except for 380V below 10kV) generally used bare wires. However, due to the complex distribution environment in urban areas, short-circuit grounding and lightning strikes often occur, resulting in reduced power supply reliability. Therefore, currently, insulated wires (i.e. the outer layer of the wire is wrapped with insulation) are generally used for overhead lines below 10kV, which is called insulated overhead lines.

　　 JKLYJ/B and JKLHYJ/B are generally three core or three core+carrying stranded wire overhead cables, where the main cross-sectional area of the conductor is 25-400mm2 and the main cross-sectional area of the carrying stranded wire is 25-120mm2. Natural color overhead cable, such as JKLYJ/B-10 3 × 240+95 (A) GB/T 14049-2008, refers to an aluminum core lightweight cross-linked polyethylene insulated overhead cable with a rated voltage of 10kV and 4 cores. The main core is 3 cores with a nominal cross-section of 240mm2, and the load-bearing stranded wire is galvanized steel wire with a nominal cross-section of 95mm2.

　　 There are two types of overhead insulated conductors: aluminum core and copper core. In the distribution network, aluminum core is widely used, mainly because aluminum is relatively light and cheap, with low requirements for line connectors and supports. In addition, the original distribution network also mainly uses steel core aluminum stranded wire, and aluminum core wire is used to facilitate the connection of the original network. Aluminum core wire is also commonly used in practical applications. Copper core wires are mainly used as down conductors for transformers and switchgear.

　　 insulating material

　　 There are two types of insulation protection layers for overhead insulated conductors: thick insulation (3.4mm) and thin insulation (2.5mm). Thick insulation allows frequent contact with trees during operation, while thin insulation only allows short-term contact with trees. The insulation protection layer is divided into cross-linked polyethylene and lightweight polyethylene, with cross-linked polyethylene having better insulation performance.

　　 National standard JKLYJ-10kv-1 * 300 Shandong Jining overhead insulated wire manufacturer

　　Transportation precautions;

　　 It is strictly prohibited to throw cables or cable reels containing cables from a height during transportation, especially at lower temperatures (usually around 5 ℃ or below). Throwing or dropping cables may cause insulation and sheath cracking. Try to avoid storing cables in an exposed manner outdoors as much as possible, and cable reels are not allowed to be laid flat. When lifting the packaging of the JKLYJ overhead line model, it is strictly prohibited to lift several reels at the same time. On vehicles, ships, and other transportation vehicles, cable reels should be secured using appropriate methods to prevent collisions or tipping over, in order to prevent mechanical damage to the cables. Cables must not come into contact with acids, alkalis, and mineral oils, and must be stored separately from these corrosive substances There shall be no harmful gases that damage insulation or corrode metals in the warehouse where cables are stored. During the storage period, the cable should be rolled regularly (once every 3 months in summer, and may be extended at discretion in other seasons). When rolling, roll the storage tray upside down to prevent the bottom from getting damp and rotting. When storing, it is important to regularly pay attention to whether the cable head is intact and undamaged.

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• Overhead insulated conductor