Product Models: JL, JUG1A

Executive Standard: GB/T 1179‑2008

All conductors of JL and JUG1A series are manufactured, sampled‑tested and inspected in strict compliance with the national standard GB/T 1179‑2008. This authoritative specification lays down comprehensive requirements covering raw‑material selection, conductor stranding structure, electrical conductivity, tensile strength, corrosion‑resistance performance, dimensional tolerance, finished‑product acceptance and long‑term ageing evaluation. Throughout the whole manufacturing workflow, our factory carries out rigorous incoming‑material inspection for every batch of aluminium wire and steel core. Each production stage, including wire‑drawing, multi‑layer stranding, surface anti‑oxidation treatment and finished‑product testing, follows standardized technical procedures. Our complete quality‑control system eliminates defective goods before delivery and guarantees that every reel of overhead conductor meets the mechanical‑strength and electrical‑transmission requirements for long‑distance overhead power‑grid construction. Whether deployed in plain areas, mountainous terrain or coastal corrosive environments, the finished conductors maintain stable physical and electrical performance throughout their designed service life, providing solid technical support for overhead transmission and distribution projects of all voltage classes.

Application

Aluminium‑conductor steel‑reinforced (ACSR) conductors represented by JL and JUG1A adopt a composite‑structure design: high‑purity aluminium strands undertake electric‑energy transmission while the inner high‑strength steel core bears most of the mechanical tension load. Thanks to this scientific composite layout, the conductors feature a simple and compact overall structure with no complicated built‑in components. The straightforward layout greatly simplifies field erection procedures and cuts down routine maintenance work after the power‑line is put into service. Power‑grid operators can complete visual inspection, fault checking and component replacement conveniently, which lowers long‑term operation expenditure for overhead lines. In terms of economic efficiency, ACSR conductors deliver large power‑transmission capacity under a relatively‑low‑cost investment framework. Compared with many other overhead conductive materials, they achieve an excellent balance between construction cost, conductive performance and mechanical durability, helping power‑supply enterprises control the total investment of large‑scale grid‑building projects.

One of the most outstanding advantages of JL‑ and JUG1A‑type steel‑cored aluminium conductors lies in their adaptability to complex geographical conditions. Many transmission corridors have to cross wide rivers, deep valleys, hilly zones and other difficult terrain where constructing intermediate transmission towers is technically difficult or economically prohibitive. With remarkable tensile strength supplied by the inner steel core, these conductors can span long distances between two supporting towers, making long‑span river‑crossing and valley‑crossing overhead‑line schemes highly feasible. Their excellent electrical conductivity guarantees low energy loss during long‑distance power delivery, while sufficient mechanical strength enables the conductor to withstand loads from wind pressure, ice coating and temperature variation. The high tensile property permits engineers to increase the span distance between adjacent transmission towers, thus reducing the total quantity of tower foundations and steel poles along the route and further decreasing overall construction investment. For all the above‑mentioned merits, JL and JUG1A steel‑cored aluminium conductors have been widely adopted for overhead transmission and distribution circuits covering low‑voltage, medium‑voltage and high‑voltage levels across the power industry. They serve as the primary conductive material for urban power‑grid upgrading, rural electrification projects, inter‑regional long‑distance power‑delivery trunk lines and industrial‑zone overhead power supply.

Service Characteristics

High‑voltage overhead transmission projects frequently face corridor‑resource shortages in densely‑populated regions or environmentally‑sensitive zones. In many cases, land‑use restrictions make it impossible to build multiple independent transmission corridors running along one single route. To maximize the power‑carrying capability of limited land resources, power‑engineering specialists have developed the multi‑conductor layout scheme known as multi‑circuit erection on the same tower. Under this design principle, one steel transmission tower carries several independent power circuits simultaneously. A single tower foundation supports multiple groups of overhead conductors, which is equivalent to placing several transmission lines along one shared corridor. This layout dramatically saves land resources occupied by power‑infrastructure construction and reduces environmental disturbance along the transmission path.

In China’s national high‑voltage power‑grid construction, the 500 kV transmission network is a vital backbone for long‑distance energy transportation. For most 500 kV overhead circuits, engineers commonly deploy four sub‑conductors for each transmission phase. This special multi‑bundle conductor configuration, widely referred to as multi‑circuit erection on the same tower, brings multiple technical benefits. It lowers the surface electric‑field intensity of each single conductor, suppresses corona discharge loss, reduces audible noise generated by high‑voltage lines and improves the total power‑transmission capacity of the corridor. JL‑ and JUG1A‑series steel‑cored aluminium conductors are perfectly qualified for such demanding multi‑bundle layouts. Their consistent tensile strength, uniform outer diameter and stable anti‑vibration performance make them well‑suited for long‑span, high‑altitude and heavy‑load overhead erection schemes. When installed in multi‑conductor bundles, these conductors maintain balanced mechanical stress distribution under wind‑induced vibration, lowering the risk of conductor fatigue fracture and extending the service cycle of the whole transmission circuit.

Industrial Applications and National‑Key‑Project Support

Benefiting from their mature composite structure, stable field performance and wide environmental adaptability, our JL and JUG1A overhead conductors have been deployed across a broad spectrum of industries as well as numerous national key infrastructure projects. In the metallurgical sector, these overhead lines deliver reliable bulk power supply for large smelting workshops and heavy‑industrial production bases, where continuous high‑capacity electricity transmission is essential. Within the electric‑power industry, they form an indispensable part of regional distribution networks and long‑distance trunk transmission lines, promoting cross‑regional allocation of electric‑energy resources. For new‑energy and energy‑development projects, the conductors connect photovoltaic power stations, wind‑farms and other clean‑energy facilities to the main public grid, enabling renewable‑electricity output to be transmitted to consumption centres efficiently.

In chemical‑industry parks, overhead ACSR lines supply stable power for chemical production equipment while resisting atmospheric corrosion from industrial emissions. Urban construction projects rely on these overhead conductors to build municipal power‑supply frameworks for new residential districts, commercial zones and public facilities. Shipbuilding yards and marine‑industrial bases adopt our overhead conductors to build on‑site power‑distribution networks for workshop production. The transportation industry applies JL and JUG1A conductors for railway power‑supply lines, highway service‑area electricity distribution and other traffic‑related infrastructure. Beyond ordinary industrial‑sector applications, these overhead conductors are frequently selected for national‑level key construction projects, including large‑scale power‑grid interconnection programs, cross‑provincial energy‑transmission initiatives and major infrastructure‑upgrade schemes. Every finished conductor undergoes strict quality‑screening before dispatch, ensuring high‑reliability power delivery for these vital strategic engineering programs.

Enterprise Strength and Nation‑Wide Service Network

Supported by advanced production facilities, complete performance‑testing laboratories and a mature quality‑management system, our full range of overhead conductors and cable products have earned a solid reputation in the domestic power‑equipment market. Our overhead‑line products enjoy great popularity all over China and have won long‑term trust from power‑supply corporations, engineering contractors, industrial manufacturers and infrastructure‑construction enterprises. Our company maintains stable, long‑term cooperative relationships with numerous power‑grid‑construction partners across provinces, autonomous regions and municipalities.

To deliver fast, convenient and professional customer support, we have built a localized service network covering major industrial hubs and geographical zones. We have established permanent service offices in Tangshan, Shanghai, Xi’an, Shandong, Xinjiang and other core‑economic regions of China. These regional offices provide one‑stop customer services, including pre‑sales technical consultation, conductor‑model‑selection guidance, on‑site erection‑process support, regular operational‑condition follow‑up and comprehensive after‑sales maintenance solutions. Whenever customers encounter technical questions during overhead‑line design, conductor installation or routine circuit operation, our local service team can respond rapidly and offer targeted problem‑solving advice. Our regional service outlets shorten the distance between our factory and construction sites, reduce communication delays and help guarantee smooth implementation of overhead transmission‑and‑distribution projects. By combining high‑quality overhead conductors such as JL and JUG1A with localized, efficient customer service, our enterprise continues to deliver secure, cost‑effective and long‑lasting power‑transmission solutions for industrial clients, municipal‑grid builders and national key‑project developers throughout the country.