(1) The gas insulation layer type dominated by heat shrink materials is an initial product and has been replaced.
(2) The rubber insulation board outer layer is used as the main material for the safety protection type cable branch box. Long term operation is prone to internal page separation and exposed edge cracking, causing damage to the insulation layer and sealing, thus limiting the development trend of this product.
(3) Sealing type cable branch box with EPDM as the main material for cable terminals. Its material is relatively hard, while EPDM is a flammable raw material that is prone to creepage or arcing, making it very easy to ignite. In addition, its waterproof, moisture-proof, and anti-aging properties are also poor, and it cannot meet the requirements for long-term operation without maintenance. EPDM is a toxic substance and also poses adverse conditions for environmental protection.
(4) Inductive charging plug-in cable terminal type cable branch box. In China's power supply and distribution system, which is a three-phase transformer power supply system, it is unlikely to guarantee additional induction power generation during unplugging and unplugging. Such unplugging and unplugging may cause serious neutral line deviation, resulting in a two-phase power supply system in the short term, which can lead to large-scale power outages and safety accidents, causing unnecessary property losses to the power supply system and machinery equipment.
(5) Silicone main material cable terminal head flood proof cable branch box. Its material is soft, with high elasticity, high density, and a fully insulated layer. The sealing properties of the raw materials are excellent, achieving advantages such as waterproofing, moisture resistance, aging resistance, flame retardancy, corona discharge resistance, and long-term operation without maintenance. Due to the transition fit between silicone and cable, the precision of axial retraction is high, which makes it difficult for the inner pages to separate due to thermal expansion and contraction, resulting in internal creepage penetration. In addition, there is long-term axial working pressure on the cable itself, making the fusion of the inner pages inseparable and reliable. In addition, silicone is essentially a non-toxic raw material, which is also beneficial for environmental protection.
(6) Cable branch box with SF6 high-voltage load switch for disconnection. Because this product can maintain the function of an inflatable cabinet and is priced lower than an inflatable cabinet, it has the key function of replacing the shutdown station outdoors, which is beneficial for maintenance experiments and repairing branch lines, reducing property losses caused by power outages. Especially in difficult situations such as road corridors and building high and low voltage distribution rooms, it presents its advantages.