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Yueqing Yanpan Industrial Zone
Zhejiang Wankai Electric Power Technology Co., Ltd
Yueqing Yanpan Industrial Zone
With the acceleration of urban construction, the contradiction between 10kV line planning corridors and urban planning and development construction is becoming increasingly severe. To meet the needs of social development and achieve safe, stable, and reliable power supply.
1.1 Structure, Characteristics, and Performance of Cable Branch Boxes
Fully enclosed, fully protected, resistant to pollution and corrosion, meeting all day outdoor operating conditions, and able to adapt to different working environments.
The cable branch box belongs to the pedestal type box body, with a small volume and small footprint. Some have a footprint of 0.65m2, while those with SF6 switches only have a footprint of 1.45m2. It has a beautiful appearance and will not cause damage to the urban appearance.
The conductor connectors inside the branch box are crimped, which is easy to install and flexible for incoming and outgoing lines. There can be up to 6-8 branch incoming and outgoing lines in use, which can achieve multi-channel power transmission in the community, providing technical support for penetrating the load center, shortening the power supply radius, and reducing line losses. At the same time, the cable branch box can be equipped with power indicators, fault indicators, silicone rubber fully insulated insertion lightning arresters, mechanical program locks, grounding switches, etc., to ensure the safety of operation, maintenance, and management.
In conjunction with cable network ring network power supply, SF6 and other ring network load switches can be configured to meet local power outage maintenance requirements without affecting the operation of the main network, achieving regional power outage maintenance and reducing the scope of power outages. At the same time, the ring network cable branch box can achieve ring network power supply, laying the foundation for the future adjustment of the 10kV line network structure.
1.2 Installation, use and precautions of cable branch box
At present, there are many varieties of 10kV outdoor cable branch boxes produced in China, so the installation and construction of 10kV cable branch boxes have become very important. Whether the operation method for installing and connecting cable branch boxes and cable joints is correct, whether the installation process of cable joints is familiar, the order in which the internal components of the cable branch box are combined with the cable joint components, and whether they are operated according to the installation specifications provided by the manufacturer will directly affect the service life and normal operation of the cable branch box.
Before operating the cable branch box, it is necessary to check whether the grounding wires of each branch cable are securely connected to the grounding terminals of the box. At the same time, the outer shell of the box must be directly connected to the grounding grid or have a clear grounding point.
After the installation of the cable branch box is completed, the components of the cable must be tested together according to the relevant testing standards and conditions.
At present, cable branch boxes have been widely promoted and used not only in county towns but also in some townships, and their good power supply performance has gained the trust of society and a large number of electricity customersI believe that in the near future, cable branch boxes will be used in more occasions and gradually demonstrate their effectiveness.