Switch-type cable distribution box
Product introduction
- The switch-type outdoor cable distribution box is a sim-structured and lightweight switchgear with sulfur hexafluoride load switches and vacuum circuit breakers as its core components. It is suitable for AC 50Hz, 12kV power systems and is widely used in industrial and civil cable ring networks and power supply terminals. It is particularly suitable for the following places: power distribution in urban residential areas, small secondary substations, switch stations, industrial and mining enterprises, shopping malls, airports, subways, wind power generation, hospitals, stadiums, railways, tunnels, etc.
- The main switch of this outdoor cable distribution box can be selected from SFG type produced by ABB, FLUORC type produced by VEI of Italy, domestic SF6 load switch and vacuum circuit breaker and circuit breaker matching protection devices (various spring-mechanism vacuum circuit breakers, such as VS1 type, VD4 type; Various permanent magnet mechanism vacuum circuit breakers, such as Tride ISM type, Ukraine BP1 type, etc., have two operation modes: manual and electric. They can also be equipped with FTU devices to achieve four-remote functions.
Product model description
▲Busbar air-insulated SF6 load switch distribution box
Technical Parameters
The three-position SF6 load switch has three working states: closed, open and grounded (two positions can be selected according to customer needs). The operating mechanism has a strict function to prevent misoperation. SF6 gas is adopted as the arc-extinguishing medium, filled with SF6 gas at 0.045MPa(20℃), and the switch housing can be provided with a fracture observation window. The switch is equipped with a capacitive live display for showing the live status. The operating mechanism can be selected in either electric or manual mode. This switch has a long mechanical life and requires no maintenance for 30 years.
- The live busbar and the switch (circuit breaker) are sealed as a whole in the gas box to achieve an overall common box structure. The overall common box protection level is IP67, which can truly ensure safe operation under short-term flood inundation.
- The SF6 gas adopts a common box structure, with the moving and static contacts, arc extinguishing chamber and busbar sealed in the same box. The designed maintenance-free life is 30 years.
- It features reliable mechanical interlocking and has analog markings on the cabinet panel, fully ensuring operational safety.
- It adopts fully sealed and fully insulated cable head connection and has a live display function.
- The busbar is expandable. The extended busbar is of fully insulated and fully shielded structure, ensuring it is not affected by climatic conditions and is maintenance-free.
- It features the best combination schemes such as load switch, load switch + fuse protection and vacuum circuit breaker protection, meeting the needs of various incoming and outgoing line circuits.
- The fully enclosed voltage transformer is adopted for power supply, providing power and voltage signals to the operating mechanism and FTU, and ensuring uninterrupted power supply.
▲ Fully enclosed and fully insulated combined switchgear ▲Fully enclosed and fully insulated circuit breaker cabinet
▲Load switch with fuse (in assembly) ▲Fully enclosed and fully insulated load switchgear
Structural example diagram of cable distribution box with SF6 load switch
- The unit-type sulfur hexafluoride outdoor ring main unit is a new generation of enclosed switchgear suitable for distribution automation. It uses sulfur hexafluoride load switches and vacuum circuit breakers as the main switches, while the busbars are air-insulated. It is compact and expandable, featuring a simple structure, flexible operation, reliable interlocking, and convenient installation. The load switches respectively adopt SF6 load switches assembled with high-quality components such as the original imported SFG type produced by ABB and the FLUORC type produced by VEI of Italy. Circuit breakers can adopt various spring-mechanism vacuum circuit breakers, such as side-mounted VS1 type and VD4 type. A variety of permanent magnet mechanism vacuum circuit breakers, such as the Tride ISM type and the Ukraine BP type, are provided, along with various circuit breaker protection devices. There are two operation modes: manual and electric. It can also be equipped with an FTU device to achieve the four-remote function.
Product Features
According to the user’s usage environment requirements, the outer box body can be made of various materials and structures as per the user’s demands, such as cold-rolled steel plate, stainless steel plate, color steel plate, aluminized zinc plate, etc. The appearance is available in multiple colors to ensure no fading for 20 years. The top cover is inclined, with a rainproof eave design, and is equipped with upper and lower ventilation openings. Each ventilation opening is provided with a dust-proof filter screen, creating an air convection from top to bottom, which enables the box to have excellent heat insulation and ventilation effects. The bottom of the box is equipped with a sealed bottom plate for cable entry and exit to prevent moisture from the cable trench from entering the box.
The internal box materials are all made of imported high-quality aluminized zinc plates or plates as per the user’s requirements, processed by CNC numerical control equipment and riveted as a whole. The outgoing line can be selected in multiple ways according to the user’s requirements, and the incoming and outgoing lines are convenient and flexible.
- Core components -SF6 load switch, vacuum circuit breaker
▲ Environmentally friendly outer box body ▲Stainless steel outer box body
- The SF6 gas-insulated compact metal-enclosed switchgear adopts a modular design to meet the needs of various end-type and ring network type users. It has the advantages of compact structure, small floor space and maintenance-free. At the same time, it also features a branch box with a switch and an outdoor switch station. It is widely applied in power distribution in urban residential areas, small switchgear stations, box-type substations, etc.
Main Features
- Maintenance-free and operates safely and reliably
The SF6 gas is of an integral box-type structure. The box body is made of high-quality SUS304L stainless steel and formed by laser welding. After being inspected by dedicated welding flaw detection equipment, it undergoes various professional processing procedures and is filled with SF6 gas at the specified pressure. Seal the moving and static contacts, arc extinguishing chamber and busbar in the same air box. The designed maintenance-free lifespan is 30 years.
- Reliable mechanical interlocking
The load switch and grounding switch are equipped with reliable mechanical interlocks. When the main switch is forced to close, the grounding switch cannot be placed in the grounding position. There are analog markings on the cabinet panel to fully ensure operational safety.
- Fully sealed and fully insulated cable for incoming and outgoing lines
According to the user’s requirements, European or American bushings are adopted for the incoming and outgoing lines, and they are connected to the corresponding fully sealed and fully insulated cable heads. It also has a live display function, which can accurately show the live status of each circuit.
A dedicated voltage transformer is adopted to obtain power, providing power supply and measuring protection voltage signals for the operating mechanism and FTU. And install dedicated batteries and charging modules to ensure uninterrupted power supply to the operating power source and FTU. FTU devices with corresponding functions are provided according to the user’s needs.
Technical Parameters
开关型电缆分接箱
- 概述
- 开关型户外电缆分接箱是以六氟化硫负荷开关、真空断路器为核心部件的结构简单、体型轻巧的开关设备，适用于交流50Hz、12kV的电力系统，广泛应用于工业及民用电缆环网及供电末端。特别适用于以下场所：城市居民区配电、小型二次变电站、开闭站、工矿企业、商场、机场、地铁、风力发电、医院、体育场、铁道、隧道等。
- 该户外电缆分接箱的主开关可选用ABB产SFG型、意大利VEI 产 FLUORC型、国产SF6负荷开关和 真空断路器及断路器配套保护装置(各种弹簧机构真空断路器，如VS1型 、VD4型；各种永磁机构真空断路器，如特瑞德ISM 型，乌克兰BP1 型等),操作方式有手动、电动两种，并可加配 FTU装置，实现四遥功能。
▲母线空气绝缘式SF6 负荷开关分接箱
| 额定电压 |
12kV |
| 额定电流 |
630A,1250A |
| 额定热稳定电流(2s) |
20kA |
| 额定短路关合电流(峰值) |
50kA |
| 额定转移电流 |
2000A |
| 雷电冲击电压 |
85kV |
| 工频耐压 |
48kV |
| 机械寿命 |
5000次 |
| SF6气体额定压力 |
0.045MPa |
| SF6气体年泄露率 |
≤0.5% |
| 真空短路器操作机构 |
弹簧/赫兹 |
| 真空断路器开断能力 |
20/25KA |
|
△ FLN36型SF6 负荷开关 |
▲FLN48型SF6 负荷开关 |
三工位SF6 负荷开关，有三种工作状态：合闸、分闸、接地(可根据客户需要选用二工位),操作机构具有严格的防止误操作功能；采用SF6 气体作为灭弧介质，充以0.045MPa(20℃)的SF6 气 体，开关外壳可设有断口观察窗；开关带有显示带电状态的电容式带电显示器；操作机构可选电动、手动二种方式，本开关机械寿命长，30年免维护。
- 将带电母线和开关(断路器)整体密封在气箱中，实现整体共箱结构，整体共箱防护等级IP67,可真 正 实 现洪水短时淹没安全运行。
- SF6气体共箱式结构，动静触头、灭弧室、母线密封在同 一 气箱内，设计免维护寿命30年。
- 具有可靠的机械联锁，并在柜体面板有模拟标识，充分保障操作安全。
- 采用全密封、全绝缘式电缆头连接，并有带电显示功能。
- 母线可扩展，扩展母线为全绝缘、全屏蔽结构，保证不受气候条件影响和免维护。
- 具有负荷开关、负荷开关+熔断器保护和真空断路器保护等最佳组合方案，满足多种进出线回路的需要。
- 采用全封闭式电压互感器取电，给操作机构和FTU提供电源和电压信号，并保证不间断供电。
▲ 全封闭全绝缘组合开关柜 ▲全封闭全绝缘断路器柜
▲配熔断器的负荷开关(装配中) ▲全封闭全绝缘负荷开关柜
带 SF6负荷开关的电缆分接箱结构实例图
- 单元式六氟化硫户外环网柜是新一代以六氟化硫负荷开关、真空断路器作为主开关而母线采用空气绝缘的、适用于配电自动化的、即紧凑又可扩充的封闭开关设备，具有结构简单、操作灵活、连锁可靠、安装方便等特点。负荷开关分别采用原装进口ABB产SFG型、意大利VEI产 FLUORC型、优质元件组装的SF6负 荷开关。断路器可采用各种弹簧机构真空断路器，如侧装VS1型 、VD4型；各种永磁机构真空断路器，如特瑞德ISM型，乌克兰BP型，并配套各种断路器保护装置。操作方式有手动、电动两种，并可加配FTU装置，实现四遥功能。
根据用户使用环境需求，外箱体可根据用户要求采用各种材质、结构，如冷轧板、不锈钢板、彩钢板、覆铝锌板等，外观多种颜色可选择，保证20年不褪色。顶盖倾斜、防雨檐设计，并设有上下通风口，各通风口设置有防尘过滤网，形成自上而下的空气对流，使箱体具有良好的隔热和通风效果；箱体底部有电缆进出线的密封式底板，防止电 缆沟内的潮气进入箱体。
内部箱体材料全部采用进口优质覆铝锌板或根据用户要求的板材，经CNC 数控设备加工，整体铆接而成；出线根据用户要求多种方式可选择，进出线方便、灵活。
▲环保型外箱体 ▲ 不锈钢外箱体
- SF6气体绝缘紧凑型金属封闭开关设备采用模块化设计，满足各种终端型和环网型用户的需求。具有结构紧凑、占地面积小、免维护等优点，同时兼具带开关分支箱、户外开闭所等特点。广泛应用于城市居民区配电、小型开闭站、箱式变电站等。
SF6 气体整体共箱式结构，箱体采用SUS304L型优质不锈钢经激光焊接成型，并经专用焊接探伤设备检 查后经过各种专业工序加工，充以规定压力的SF6气体。将动静触头、灭弧室、母线密封在同一气箱内。设计免维护寿命30年。
负荷开关和接地开关具有可靠的机械联锁，强制主开关合闸时接地开关不能置于接地位，并在柜体面板有模拟标识充分保证操作安全。
根据用户要求采用欧式或美式套管进出线，并与相应全密封全绝缘式电缆头连接。并有带电显示功能，可准确显示每回路带电状况。
采用专用的电压互感器取电，给操作机构和FTU 提供电源和测量保护电压信号。并安装专用的蓄电池和充电模块保证操作电源和FTU的不间断供电。根据用户需要配套相应功能的FTU装置。
