F : LBS-Fuse combination unit
Safety and protection
In front of the disconnector visual fracture cabinet, there is an obvious isolation fracture visual window, which can view the isolation closing position, isolation opening position and grounding closing position. It is very convenient.
Pressure relief design internal arc pressure valve: when there is arcing in the product, the pressure will be released from the pressure relief valve. The arc will be discharged to the cable trench to avoid accidental injury to operators.
The green design does not use SF6 gas as arc extinguishing medium and insulation. It has no pollution to the environment. The primary circuit adopts less contact design to ensure low energy consumption during operation.
application area
Low temperature and cold area: there is no SF6 gas application. It does not need to consider the low temperature operation of SF6 gas. It can also operate normally at - 45 ° C.
Plateau area: no need to consider the influence of Plateau Atmospheric Pressure on insulation performance.
Strong wind and sand area: dense insulation ring main unit body safety protection grade is IP67. Special treatment is adopted in control circuit room to ensure long-term operation in strong wind and sand area.
Coastal humid area: epoxy resin sealing, moisture resistance, salt spray corrosion resistance, to ensure long-term use in coastal areas.
Areas with high environmental protection requirements: the impact of SF6 gas on atmospheric warming has been highly valued, and SF6 gas has been cancelled in solid ring main unit, which has no pollution and damage to the environment and human body.
In the smart grid: since the main switch can be electrically operated, the intelligent controller developed by our company can be used for remote control, telemetry and remote signaling of the switchgear and substation site. It can not only carry out decentralized control, but also facilitate centralized control.
固体绝缘环网柜机芯结构特点 Structural characteristics of solid insulated ring main unit
Vacuum circuit breaker has the ability of breaking short-circuit current. It is used for overload and short-circuit protection of circuit and electrical equipment. It has the advantages of small volume, light weight, small maintenance workload, fire prevention, explosion-proof and low operation noise. It is an ideal circuit breaker to replace oil circuit breaker and SF6 circuit breaker. It is widely used in power, metallurgy, communication, etc High frequency heating and other distribution systems in the industry. Vacuum interrupter for circuit breaker is the key component of vacuum circuit breaker and the heart of vacuum circuit breaker. It basically determines the main performance of circuit breaker.
Solid insulation system
The current carrying conductors, such as vacuum interrupter and upper and lower outlet sockets, are packaged as a whole by the solid sealing pole formed by APG process. The disconnector is installed in the cavity of the fixed pole, so that the phase to phase insulation is mainly solid insulation. Single phase insulated bus design can avoid serious faults such as phase to phase and ground. Bus expandable design. Realize unlimited expansion of function unit.
Three position knife switch
All switch cabinets are equipped with three position knife switch. The three position knife switch and the main switch are built into the fixed pole. Three phase linkage. It can be operated to realize three positions of work / isolation / grounding. Mechanical interlock is adopted with the main switch. Only when the main switch is in the opening position, the three position knife switch can act.
Operating mechanism
The operating mechanism of the circuit breaker is a spring operating mechanism. It has the characteristics of simple structure, reliable action, small size and maintenance free. The closing power can be adjusted up and down according to the user's requirements. The mechanism can be manually stored energy, manually closed and manually opened. It can also be electric energy storage and electric opening and closing, which is convenient for users to operate.
The operating mechanism of three position knife switch adopts the design of through spring. It can quickly open and close. It has the function of breaking and closing certain load current. Besides manual operation, it can also carry out electric operation. It can realize intelligent remote control isolation and grounding, which greatly facilitates the use of users.
Solid insulated ring main unit is a kind of small switch cabinet, its structure is as follows:
A. High voltage load switch and high voltage live parts are sealed in epoxy resin insulating sleeve without any gas. The vacuum interrupter is small in size and reliable in arc extinguishing. The load switch is equipped with grounding switch. It has three positions of closing, opening and grounding. The grounding knife has the function of isolating knife.
B. It can be combined at will. Each unit is led out through three high voltage bushing, so the cable connection is convenient.
C. The imported sealing box is adopted, and strict sealing measures are adopted at the connection of operating mechanism and high-voltage bushing, and the performance is good.
D High voltage bushing and high-voltage insulating cylinder made of imported epoxy resin are adopted in APG process. The insulating cylinder and high-voltage bushing are assembled with silicone rubber sleeve and have good sealing effect.
E Each channel is equipped with independent operating mechanism. The mechanism is installed on the front of the cabinet body and has a variety of mechanical interlocking functions.
F Load switch and grounding switch are equipped with spring operating mechanism. Load switch can be operated manually or electrically. Grounding switch not only has grounding function, but also has isolation function. It can only be operated manually.
G. the circuit breaker can be equipped with permanent magnet operating mechanism. It can be electrically closed and opened. It can be opened manually, but it can not be closed manually. The circuit breaker can also be equipped with spring mechanism, which can be manual or electric. The interface of distribution automation is reserved.
H. There is a visual window on the panel of the ring main unit, which can directly observe the opening and closing state of the disconnector fracture, and there are obvious breaking points.
I each RMU unit is composed of three separate insulating cylinders in parallel. It is easy to install and replace. The biggest advantage is to avoid phase to phase discharge.
J. the main components of solid insulation fully enclosed ring main unit are composed of insulating cylinder and vacuum interrupter.
K The solid insulation material is imported epoxy resin. The thickness is not less than 10 mm. It has strong corrosion resistance and high insulation capacity. The internal space is more than 150 mm. The phases are separated separately and connected together through the base plate mounting frame. The combination is flexible, the structure is simple, reasonable and beautiful.
L. There is no fastener on the surface of the box for disassembly. It has good anti-theft property. The box has the protection grade of ip33 and good rain proof performance.
M The top cover is equipped with ventilation . The air inlet is located at the lower part of the box body, and dust-proof filter screen is set. The air outlet is set at the top of the box and hidden under the room slot to form air convection from bottom to top. The box has good heat insulation and ventilation effect. The cover is provided with a certain angle of drainage angle.
N. The box has a sealed floor with cable inlet to prevent moisture in the cable trench from entering the box.
O the door is sealed with sealing strip. The door lock is rainproof structure, and the limited pull rod makes the door easy to fix when the door is opened.
P The switch in box is of solid insulation and fully sealed structure. There is no need for heater. The cable head can be divided into touch type and non touch type according to the user's requirements. It is not afraid of immersion.
Operating mechanism and operation
A. each load switch and grounding switch in the ring network unit are equipped with independent spring operating mechanism. They are installed on the front panel of the cabinet, and can be operated manually make. There are two operation holes on the panel for operating load switch and grounding switch respectively. Vacuum circuit breaker is equipped with integrated permanent magnet operating mechanism and spring operating mechanism.
B. operating instructions of load switch power transmission operation
First close the isolating grounding switch: insert the operating handle into the grounding operation hole (when the disconnector is in the grounding closing state) · rotate counterclockwise to open the grounding
Then insert the operating handle into the isolation operation hole. Turn it anticlockwise to close the isolating knife.
Re closing the load switch: insert the operating handle into the operation hole of the main switch. Turn it about 2 times anticlockwise to close the main switch.
Blackout operation
First open load switch: turn the opening knob anticlockwise to open the switch.
Then open the isolation grounding switch: insert the operating handle into the operating hole of the isolation mechanism. Rotate it clockwise to separate the isolating knife, and then insert the operating handle into the grounding operation
Inside the hole. Rotate clockwise. Close the grounding.
C operating instructions of circuit breaker
D mechanical interlocking: there is mechanical interlocking between load switch, circuit breaker and grounding switch. When the load switch and circuit breaker are in the closing state, the grounding switch cannot be opened
Closing: grounding switch is in closing state, load switch and circuit breaker cannot be opened or closed.
E. Installation and replacement of fuses
(1) Close the grounding switch first.
(2) Lift the handle and rotate it anticlockwise to make the pin out of the groove
(3) Install the striker mechanism into the fuse barrel, make the pin in the slot, rotate clockwise, make the operation handle parallel to the panel, and then press down the handle with force.
(4) It can only be opened when the load switch is grounded.
结构示意图 Structure diagram
产品外观展示Product appearance display
户内型环网单元的柜体结构如图示 The cabinet structure of indoor ring network unit is shown in the figure
户外型环网单元的柜体结构如图示The cabinet structure of outdoor ring network unit is shown in the figure
安装及尺寸图Installation
●开关设备安装基础的施工应符合《电力建设施工及验收技术规范》中的有关条款规定
The foundation for cubicle should be in conformance with relative requirements stipulated in《The code of erection and
acceptance of electric power construction》
●柜体单列时，柜前走廊以1.5米为宜：双列布置时，柜间操作通道走廊以2米为宜
The corridor width in front of cubicles arranged in one row takes l.5m properly, and 2m proper for double rows arrangement
●一次电缆终端安装严格按相关工艺要求
The fitting of primary cable teerminals should be strictly according to relevant technology requirements
●电缆沟上方预埋10号槽钢，柜子放在槽钢上固定
The No. 10 U steels built in the top edges of cable trench can be used as the base of cubicle
环网单元应安装在通风良好的地方.在正面操作和维护.环网单元的底座有地脚安装孔.在室内柜体可以离墙或 靠墙安装.安装位置如图示。安装地基上所铺设轨道的平面度.每平米范围不得超过2mm 环网单元的底座必须固 定在地基上。户外安装时地基要求建在较高地势处.四周离墙或遮挡物的距离不得小于1米.以免妨碍开门。坑壁用 水泥和实心砖砌制.表面作防渗水处理。坑壁及基础平台用1：2.5水泥沙浆面厚度为20mm.表面要平整。混泥土制 做按GB232-82《电气装置安装工程施工及验收规范》。电缆安装完成后.电缆室底板应进行密封处理.防止地沟潮气进入。环网单元的接地必须与现场的接地网相连。环网单元的接地处有接地标志。
The ring network unit shall be installed in a well ventilated place. It shall be operated and maintained in the front. The base of the ring network unit has anchor mounting holes. In the indoor cabinet, it can be installed away from or against the wall. The installation position is shown in the figure. The flatness of track laid on the installation foundation shall not exceed 2mm per square meter. The base of ring network unit must be fixed on the foundation. When installing outdoors, the foundation is required to be built at a higher terrain. The distance from the wall or shelter should not be less than 1 meter to avoid obstructing the door opening.
The pit wall is made of cement and solid brick, and the surface is treated with anti seepage. The thickness of 1:2.5 cement mortar for pit wall and foundation platform is 20 mm, and the surface shall be smooth. The concrete shall be made according to gb232-82 code for construction and acceptance of electrical installation engineering. After cable installation, the bottom plate of cable room shall be sealed to prevent moisture from entering trench. The grounding of ring network unit must be connected with the grounding grid on site. There are grounding marks at the grounding point of ring network unit.
订货时需确定的资料内容 The data needed for order
●一次线路系统图，排列图及平面布置图
Primary schame and the layout or the arrangement sketch.
●二次线路原理图，其中包括操作、信号、保护回路各电器元件的型号规格
Principle diagram of secondary circuit, including the type and the spec of electric components in operation, signal and
protection circuit.
●开关柜内电器元件的型号、规格、数量
The type, specification and quantity of primary components in the cubicle
●特殊环境条件下的要求
Special ambient condition
●附件及备件的种类和数量
The sorts and the quantity of accessories and spare parts.
●用户需要的特殊要求，订货时可以与制造厂协商
For special requirement, if any, please contact the manufacturer
地基图Foundation
说明：
1.基础施工上表面要水平,坑口边沿要预埋10#槽钢，预埋底架与混凝土面平或高出 1-2mm
2.需在电缆井旁边开一入口,以便人能进入电缆井.便于电缆安装。
3 L.S.H分别为户外箱长宽高
Explain:
1The upper surface of foundation construction shall be horizontal,
10 × 10 channel steel shall be embedded at the edge of the pit,
The embedded underframe shall be level or 1-2mm higher than the concrete surface
2. It is necessary to open an entrance beside the cable well, so that people can enter the cable well and facilitate cable installation.
3 L S H is the outdoor box length, width and height respectively
运输和储存
包装好的环网单元可用电动叉车或吊车搬运,环网单元上配备了吊环.供搬运时吊装之用。吊运用绳索不能短于2m。 环网单元在使用现场安装前应放在干燥、通风、无灰尘的地方。如用塑料袋覆盖.底部应敞开通风。
使用与维护
A 使用前的检查：环网单元在使用前.为了人身及设备安全.必须进行下列检查
-检查主电路和接地电路是否正确连接。
-检查机械联锁是否正确、可靠。
•检查环网单元内负荷开关和接地开关的操作是否灵活、正确。
•检査高压电缆的连接是否正确、可靠。
B .运行
•应按规定的操作顺序.使环网单元投入运行。
C.维护：本设备基于如下优点.不需要进行日常维护
•所有的带电部件均安装在环氧塑脂绝缘筒内。
•所有置于环氧塑脂绝缘筒外面的操作机构部件都已经进行了电镀处理。
•主轴用铜轴套支撑，就是不加润滑剂,也可以连续、有效地工作。
注意：若环网单元有故障.不要试图用钻孔机、切割机或其它工具打开环网单元修理.这些操作只能有本公司人员 负责。
随机文件和附件
产品出厂时.随机提供以下资料和附件:
•产品安装使用说明书。-产品岀厂试验报吿。•产品合格书。•装箱清单。-操作手柄。-其他附件。
Transportation and storage
The packaged ring network unit can be transported by electric forklift or crane. The ring network unit is equipped with lifting rings for lifting during transportation. The rope used for hoisting shall not be shorter than 2m. The ring network unit should be placed in a dry, ventilated and dust-free place before installation on site. If covered with plastic bags, the bottom should be open and ventilated.
Use and maintenance
A pre use inspection: before using the unit, the following inspections must be carried out for personal and equipment safety
-Check that the main circuit and the ground circuit are properly connected.
-Check whether the mechanical interlock is correct and reliable.
-Check whether the operation of load switch and grounding switch in ring network unit is flexible and correct.
-Check whether the connection of high voltage cable is correct and reliable.
B. Operation The ring network unit shall be put into operation according to the specified operation sequence.
C. Maintenance: the equipment is based on the following advantages. No routine maintenance is required
All live parts are installed in epoxy resin insulated cylinder.
All operating mechanism components outside the epoxy resin insulated cylinder have been electroplated.
The main shaft is supported by copper shaft sleeve, which can work continuously and effectively without lubricant.
Note: if there is a fault in the ring network unit, do not attempt to open the ring network unit for repair with drilling machine, cutting machine or other tools. These operations can only be carried out by our company's personnel.
Attached documents and attachments
When the product leaves the factory, the following data and accessories shall be provided with the machine:
Product installation and operation manual. -Test report of product delivery. Product qualification certificate.
packing list. -Operating handle. -Other attachments.
ELECTRIC
