The branch cable developed by our company is the special cable of the system. It is to connect the required number of branch cables at the specified trunk cable position according to the actual needs of users during production. During construction, the cable reel can be set out evenly by hanging with a hook, which is very convenient. Besides, the cable branch joints have been specially treated, and have reliable power supply and certain waterproof performance. It greatly shortens the construction period, reduces the material cost and construction cost, and ensures the reliability of power distribution The pre branch cable is composed of four parts: 1. trunk cable; 2. Branch line; 3 Branch connector: 4 relevant accessories, and there are three types: ordinary type, flame-retardant type (ZR), fire-resistant type (NH). Pre branch cable is a substitute for bus duct power supply in high-rise buildings. It has the advantages of reliable power supply, convenient installation, good waterproof, small building area, low failure rate, low price, maintenance free, etc. It is suitable for distribution lines with AC rated voltage of 0.6/1KV. It is widely used for vertical power supply in electrical shafts of middle and high rise buildings, residential buildings, commercial buildings, hotels and hospitals, as well as power supply systems of tunnels, airports, bridges, highways, etc.Product features: 1. Excellent seismic resistance, air tightness, water resistance and fire resistance 2. The main cable conductor has no joint, good continuity, and reduces the probability of failure 3. Advanced fully mechanized crimping technology is adopted to avoid the influence of human factors 4. High customization, branch position can be set according to the needs of distribution points of the distribution system 5. The contact resistance of the branch is very small, which is not affected by thermal expansion and cold contraction 6. Reduce power distribution cost and project cost, with high economic indicators and obvious comprehensive benefits 7. Simple installation, short construction period, and greatly reduced installation time compared with enclosed bus duct 8. No maintenance is required after installation and operation, and no maintenance is required at ordinary times Product advantages: It can significantly reduce the distribution cost (1) Compared with the enclosed bus duct, the price is cheap, the project cost is reduced, the economic index is high, the comprehensive benefit is obvious, and the specifications are complete, the selection is flexible, and the combination is arbitrary (2) The branch head can set the branch position arbitrarily according to the needs of the distribution points of the distribution system Low installation environment requirements and simple construction (1) Small building area, no requirement for space size of civil engineering (2) Simple laying, convenient installation, low use environment requirements, can be directly laid in cable trenches, special cable shafts in buildings, or laid in different cable trays, with low installation accuracy (3) Compared with the enclosed bus duct, the direction of the cable is random and the bending radius is small, which greatly reduces the construction difficulty and space size (4) The installation labor intensity is small, the construction period is short, and only one tenth of the enclosed bus duct is installed Excellent seismic resistance, air tightness, water resistance and fire resistance (1) It has excellent seismic resistance. Generally, the enclosed mechanical connection bus duct is installed in parallel relying on the wall. When the wall is shaken, the joints of the enclosed bus duct are loose, and the prefabricated branch cables will not be affected. Especially, no measures are required when passing through the settlement joints of the building (2) It has good air tightness and water resistance, can operate normally in humid environment, and can also be laid in the open air and buried in the soil (3) The fire-resistant prefabricated branch cable shall be kept in normal power transmission operation for 90Min under the condition of burning Maintenance free (1) High one-time opening rate after installation with branch cable according to the specified method (2) The whole prefabricated branch cable system in normal operation does not need any maintenance at ordinary times (3) The later accident emergency repair is simple and the maintenance cost is extremely low Laying and installation: Preparation before laying and installation Be familiar with and determine the laying direction and position of cables according to the requirements of design drawings (1) Prepare construction scheme and organize professional construction personnel (2) Tools and equipment for laying and installation (3) Verify the model, specification and packing sequence of cables (4) Verify the accessories and assign the installation site of accessories Constructor (1) Place the cable reel on the pay off stand (2) When the cable is vertically installed, the cable paying off rack is downstairs, and the cable is lifted through the rope with a winch or pulley block. Professional construction personnel are required for each floor. After the termination, hang the cable on the installed hook (3) When the cable is installed horizontally, the cable paying off rack is at the power receiving position, and the cable is laid manually by professional construction personnel (one person is required every two meters, and the commander is in charge) (4) Fix the central part of prefabricated branch cable trunk line and branch line as required (5) Connect the trunk line, branch line and electrical control device in phase sequence (6) Clean the site after installation, and measure the insulation resistance of each circuit connected to each phase of prefabricated branch cable (7) Fill in construction records Precautions during laying and installation 1. When laying, it is better to adopt forward hoisting. When the construction site is limited or has special requirements, it can also adopt reverse hoisting. No matter which setting method, the branch line shall not be released in advance during the process to prevent the branch body from scratching when passing through the hole, and to avoid being subjected to excessive mechanical external force 2. During hoisting, ropes with strength more than 4 times of the cable weight must be selected. After laying, install and fix clamps from top to bottom 3. The bending radius of cable shall not be less than 25D during laying and installation 4. When fixing single core prefabricated branch cable, it is prohibited to use metal clamps 5. When the trunk line and branch line are connected with the electrical measuring apparatus and the electrical measuring apparatus, the metal clamp must be used, and the metal type of the clamp must be selected correctly 6. Hangers must be installed on the load-bearing wall Ordering instructions: The pre branch cable is prefabricated as a whole according to the power distribution characteristics, design requirements and environmental conditions of the construction project. The following conditions should be noted when ordering: 1. Correctly provide the type and model of prefabricated branch cable 2. Determine the exact distance between each branch head and the size from the terminal branch head to the hanger 3. Determine the exact length of the branch line 4. Provide the distance from the beginning of the trunk line of the pre branch cable to the first branch head 5. Provide power distribution system diagram and prefabricated branch cable size sketch