Branch cable

Pre-fabricated branch cables are a new generation of wire and cable products formed by pre-arranging several branch cables on the main cable through specialized equipment and production processes. They feature reliable power supply, easy installation with no maintenance required, low overall cost, and a visually appealing design. Jincheng Wire and Cable Co., Ltd.'s FD series pre-fabricated branch cables are mainly suitable for power supply trunk lines in mid-to-high-rise buildings with rated voltages of 0.6/1KV or less, serving as an alternative to the currently widely used enclosed busbars in our country. They can be widely used in distribution systems of factories, shopping malls, residential communities, office buildings, mines, and in lighting systems for bridges, tunnels, highways, and airports. This product uses VV or YJV type plastic insulated power cables as both the main cable and branch cables, with the structure predominantly featuring single-core single-branch configurations. Single-core multi-branch and multi-core multi-branch options are also available. Special pre-fabricated branch cable products with fire-retardant, flame-retardant, low-smoke low-halogen, and low-smoke halogen-free properties can also be produced upon customer demand.

Standard of Execution

Refer to the relevant clauses of GB/T12706 "Standard for Copper-core and Aluminum-core Power Cables with Plastic Insulation at Rated Voltage of 35KV and Below" and the enterprise standards.

The primary advantages of prefabricated branch cables

Excellent power reliability

1.    The main cable conductor is seamless and jointless, reducing points of failure.

2.    Branch connectors are produced centrally at the factory with strict quality control and a comprehensive quality assurance system, thereby resolving the difficulties in the on-site manufacturing of branch connectors, which are challenging to produce and control in terms of quality.

3.    The design of the branch connection joints is rational, produced using advanced technology, with low contact resistance in the branch joints, preventing localized heating under rated current, thereby enhancing operational quality and lifespan.

Significantly reduce distribution costs

1.    The prefabricated branch cable system consists of prefabricated branch cables, brackets, clamps, and hangers. Compared to using busbars, it significantly reduces the construction cost. The prefabricated branch cable system in normal operation requires no additional maintenance.

2.    Easy and flexible installation;

3.    Branches cannot be arbitrarily set at any position as needed.

Excellent seismic resistance, airtightness, waterproofing, and other properties

1..Excellent seismic resistance; general mechanical busbar joints may loosen after wall vibrations, whereas prefabricated branch cables are unaffected, especially when passing through building settlement joints, no measures are required.

2.Excellent airtightness and waterproofing, capable of normal power supply in humid environments, and can be installed outdoors or underground.

3.Pre-fabricated substation cables can be produced with various characteristics such as flame-retardant, fire-resistant, low-smoke low-halogen, and low-smoke halogen-free, depending on the preferences of different proprietresses.

Key Technical Features

1.    Insulation resistance ≥ 200MΩ

2.    Insulation withstand voltage ≥ 3.5KV/5min

3.    The surface contact resistance of the pre-branch cable joint is less than 1.2 times the reference resistance of a branch cable of the same length.

4.    The joint short-circuit strength is high, and the bending rate of the contact resistance ratio after short-circuit is less than 0.2.

5.    Excellent airtightness and waterproof properties; the insulation resistance and withstand voltage under immersion in water meet requirements 1 and 2.

6.    VVHigh operating temperature for Type Cable is 70°C, while for YJV Type Cable it is 90°C.

7.    Excellent corrosion resistance, capable of withstanding the erosion from oil, acid, and organic solvents.

8.    The main cable and branch cables meet the other performance requirements as specified in GB12706 standards.

Primary Models, Names, and Specifications