I. Overview:
Solid Insulated Ring Main Unit (referred to as "Solid Cabinet Unit") is a core module of 10kV level ring main unit. It seals the vacuum arc extinguishing chamber, three position isolation switch/grounding switch, conductor and insulation support into a compact unit using epoxy resin APG process, without SF6, fully solid insulation, and maintenance free.
II. Structural characteristics
--Vacuum arc extinguishing chamber
Vacuum circuit breakers have the ability to interrupt short-circuit currents and are used for overload and short-circuit protection of circuits and electrical equipment. Due to its small contact distance, short arc time, slight burn when the contact breaks the fault current, low required operating energy, and fast action, it also has the advantages of small size, light weight, low maintenance workload, fire and explosion prevention, and low operating noise. It is an ideal circuit breaker to replace oil circuit breakers and SF6 circuit breakers, and is widely used in high-frequency heating and distribution systems in industries such as power, metallurgy, and communication. The vacuum arc extinguishing chamber used in circuit breakers is a key component and the heart of vacuum circuit breakers, which basically determines the main performance of the circuit breaker.
--Solid insulation system
The solid sealed pole formed by APG technology encapsulates the current carrying conductors such as the vacuum arc extinguishing chamber and the upper and lower outlet sockets as a whole. The isolation switch is installed in the cavity of the solid sealed pole, so that solid insulation is the main insulation method for phase to phase insulation. Single phase insulated busbar design to avoid serious faults such as phase to phase and ground faults. Bus expandable design enables unlimited expansion of functional units.
| Model | Size |
| GTXGN15-12 | 90*65*80cm |
At Jihui Electric Group Co., Ltd., we focus on the research, development, manufacturing, and service of medium and low voltage power transmission and distribution equipment up to 35kV. For many years, we have provided electrical solutions for power companies, industrial customers, engineering contractors, renewable energy projects, and infrastructure developers around the world.
Through our experience in the power industry, we understand that electrical equipment must do more than simply transfer electricity. Modern customers need products that provide stable performance, safe operation, easy maintenance, and long service life. This is why we developed our Solid insulated ring main unit movement for modern medium voltage distribution systems.
Our Solid Insulated Ring Main Unit Movement combines advanced solid insulation technology with reliable switching and protection functions. The product is designed to provide safe and efficient power distribution while reducing dependence on traditional insulation methods.
As power networks become more complex, customers are looking for compact and environmentally friendly medium voltage solutions. Our solid insulated ring main unit helps meet these requirements by providing reliable electrical performance, strong environmental adaptability, and flexible installation options.
We manufacture our equipment according to strict production procedures. From engineering design and material selection to assembly, testing, and delivery, every step is controlled by our professional team. Our company has obtained ISO9001 quality management system certification, ISO14001 environmental management system certification, and ISO45001 occupational health and safety management system certification.
For us, a ring main unit is not only an electrical cabinet. It is an important part of a complete power distribution system. A reliable RMU helps customers reduce unexpected downtime, improve power safety, and maintain stable operation of their facilities.
The Solid Insulated Ring Main Unit Movement is a medium voltage switching and distribution solution designed for ring network power systems. It is mainly used for receiving, distributing, controlling, and protecting electrical power in medium voltage networks.
The core technology of this equipment is solid insulation. Unlike traditional insulation systems that may use gas or air insulation methods, solid insulated RMU equipment uses solid insulating materials to protect electrical components.
Solid insulation materials provide stable electrical insulation performance, mechanical strength, and resistance to environmental changes. This allows the equipment to maintain reliable operation under different working conditions.
Our Solid Insulated Ring Main Unit is designed for medium voltage applications where customers need:
Reliable electrical switching performance
Compact power distribution structure
Improved insulation safety
Lower maintenance requirements
Long-term stable operation
For utility companies, industrial users, and renewable energy developers, selecting suitable RMU switchgear is an important decision because it directly affects the reliability of the entire power network.
The working principle of our Solid Insulated Ring Main Unit Movement is based on three key functions: power connection, electrical insulation, and circuit control.
When electrical energy enters the ring main unit, the internal conductive system transfers power through the main circuit. The solid insulation structure surrounds important electrical components, creating a stable insulation environment and reducing the possibility of electrical faults.
During normal operation, switching components control the connection and disconnection of circuits according to power system requirements. Operators can manage different sections of the network safely through the switching mechanism.
When abnormal conditions such as overload or short circuit occur, protection devices help isolate the faulty circuit. This reduces the impact on the remaining power network and improves overall system reliability.
| Working Stage | Main Component | Main Function |
|---|---|---|
| Power Input | Incoming circuit system | Receives medium voltage electrical energy |
| Insulation Protection | Solid insulation structure | Provides electrical isolation and protection |
| Switching Control | Switching mechanism | Controls circuit connection and disconnection |
| Fault Protection | Protection devices | Helps isolate abnormal electrical conditions |
Source: Working principle based on medium voltage RMU engineering practices and Jihui Electric product development experience.
When we design our products, we always focus on real application problems. Electrical equipment may operate in factories, substations, renewable energy facilities, commercial buildings, and infrastructure projects. Each environment requires reliable performance.
Our Solid Insulated Ring Main Unit Movement combines safety, efficiency, and practical design to support modern power distribution requirements.
Solid insulation technology is one of the most important advantages of this RMU system. The insulation material provides stable electrical performance and strong mechanical protection for internal components.
Compared with traditional insulation methods, solid insulation helps reduce the influence of environmental factors such as humidity, dust, and temperature changes. This improves equipment reliability in different operating conditions.
Space utilization is becoming increasingly important in modern power projects. Many urban and industrial projects have limited installation space, requiring equipment with compact dimensions.
Our Compact Medium Voltage Switchgear integrates switching and protection functions into an efficient structure, helping customers save installation space while maintaining reliable operation.
A medium voltage distribution system must operate safely under different electrical conditions. We carefully select electrical components and control manufacturing processes to ensure stable product performance.
The ring main unit structure provides flexible power distribution and improves network reliability by allowing multiple connection paths.
Maintenance costs are an important factor for many customers. Equipment that requires frequent inspection may increase operating costs and affect production efficiency.
Our solid insulated RMU reduces maintenance requirements through a reliable insulation structure and optimized design, helping customers improve long-term operating efficiency.
Different projects have different electrical requirements. Some customers require standard products, while others need customized solutions.
Our engineering team provides customized configurations according to voltage levels, installation environments, technical specifications, and project requirements.
During product development, we focus on both electrical performance and practical customer needs. A good medium voltage RMU should not only work well in testing conditions but also provide reliable service in real projects.
The following comparison shows the general differences between traditional medium voltage distribution solutions and solid insulated ring main unit technology.
| Comparison Item | Traditional RMU Equipment | Solid Insulated Ring Main Unit |
|---|---|---|
| Insulation Method | Traditional insulation structure | Solid insulation technology |
| Environmental Adaptability | More affected by installation conditions | Better resistance to moisture and dust |
| Maintenance Requirement | Regular insulation inspection | Reduced maintenance demand |
| Structure Design | Standard cabinet structure | Compact integrated design |
| Application Range | General distribution networks | Industrial, renewable energy, smart grid applications |
Source: Technical comparison based on medium voltage switchgear characteristics and Jihui Electric engineering evaluation.
The future of electrical systems requires safer, smarter, and more efficient equipment. Customers are not only looking at initial purchase costs but also considering long-term reliability, maintenance requirements, and environmental impact.
Our Solid Insulated Ring Main Unit Movement provides a practical solution for modern medium voltage power distribution. Through advanced technology, professional manufacturing, and strict quality control, we help customers build more reliable electrical networks.
From industrial facilities and renewable energy projects to urban power systems, Jihui Electric Group continues to provide dependable medium voltage equipment for global customers.
During our cooperation with customers from different industries, we have learned that every power distribution project has different challenges. Some projects require compact equipment because installation space is limited. Some need higher reliability because power interruption may affect production or public services. Others focus on reducing maintenance costs and improving long-term operation.
Our Solid Insulated Ring Main Unit Movement is designed to meet these practical requirements. With stable insulation performance, reliable switching functions, and compact design, it provides an effective solution for modern medium voltage power distribution systems.
Power companies require reliable equipment to maintain stable electricity supply for residential, commercial, and industrial users. Ring main unit systems are widely used in distribution networks because they provide flexible power routing and improve system reliability.
Our Solid Insulated Ring Main Unit supports safe switching and power distribution operations, helping utilities improve network stability and reduce the impact of electrical faults.
Solar farms, wind power stations, and energy storage systems require dependable medium voltage equipment to connect generated electricity with the grid.
Our solid insulated RMU switchgear provides reliable power control and protection for renewable energy applications. The compact design and stable insulation performance make it suitable for modern clean energy projects.
Factories and production facilities depend on continuous power supply. Unexpected electrical problems can stop production lines and increase operating costs.
Our Medium Voltage RMU Switchgear provides reliable switching and protection functions for industrial applications, including automotive manufacturing, machinery production, electronic factories, and processing plants.
Modern cities need electrical equipment that can provide high reliability while using limited installation space. Shopping centers, office buildings, hospitals, and public facilities require compact and safe power distribution solutions.
The compact structure of our Solid Insulated Ring Main Unit makes it suitable for urban distribution systems where space efficiency and operational safety are important.
Rail transit, airports, ports, and logistics centers require stable electrical systems because power reliability directly affects daily operations.
Our ring main unit equipment provides reliable electrical control and protection for transportation infrastructure projects.
Mining, petrochemical, and heavy industrial projects often operate in challenging environments. Electrical equipment must provide strong protection and stable performance.
The solid insulated structure of our RMU helps improve equipment durability and supports reliable operation in demanding industrial conditions.
| Industry | Application Example | Customer Requirement | Our Solution |
|---|---|---|---|
| Power Utilities | Distribution networks and substations | Stable electricity supply | Reliable ring network power control |
| Renewable Energy | Solar, wind, energy storage | Safe grid connection | Compact solid insulated RMU solution |
| Industrial Manufacturing | Factories and production systems | Continuous operation | Reliable switching and protection |
| Commercial Facilities | Buildings and public projects | Space saving installation | Compact medium voltage equipment |
| Infrastructure | Transportation and public facilities | High reliability | Stable power distribution solution |
Source: Application analysis based on Jihui Electric product applications and medium voltage power distribution project experience.
At Jihui Electric Group, we believe that product quality is built during manufacturing. A reliable Solid Insulated Ring Main Unit Movement requires careful control from engineering design to final delivery.
Our production process combines professional experience, standardized manufacturing procedures, and strict inspection methods. This allows us to provide customers with consistent and dependable electrical equipment.
Before manufacturing starts, our engineering team communicates with customers to understand project requirements, including voltage level, installation conditions, operating environment, and technical specifications.
Based on these details, we provide suitable product configurations and customized solutions when necessary. This helps ensure the equipment matches the customer's actual application.
The performance of medium voltage equipment depends heavily on material quality. We carefully select insulation materials, electrical components, metal structures, and protection devices.
Solid insulation materials are selected for their stable electrical performance, mechanical strength, and environmental resistance.
During production, our manufacturing team follows standardized processes to assemble every component accurately.
The cabinet structure, electrical connections, switching mechanisms, and protection systems are installed according to engineering drawings and production standards.
Before products leave our factory, each Solid Insulated Ring Main Unit completes inspection and testing procedures.
We test electrical performance, insulation condition, mechanical operation, and overall product quality to ensure safe operation after installation.
| Manufacturing Stage | Main Inspection Item | Purpose |
|---|---|---|
| Engineering Review | Technical parameters | Ensure correct product design |
| Material Inspection | Insulation and electrical components | Improve reliability |
| Assembly Control | Component installation accuracy | Maintain product consistency |
| Final Testing | Electrical and mechanical performance | Confirm safe operation |
Source: Jihui Electric Group internal manufacturing and quality inspection procedures.
Choosing a medium voltage equipment supplier is an important decision for any electrical project. Customers need a manufacturer who can provide reliable products, technical support, and long-term cooperation.
At Jihui Electric Group, we combine product development capability, manufacturing experience, and professional service to provide complete power distribution solutions.
We specialize in medium and low voltage power transmission and distribution equipment up to 35kV. Our product range includes ring main units, Cable accessories, Cable distribution boxes, Prefabricated Substations, combination transformers, SF6 load switches, Vacuum circuit breakers, and other electrical equipment.
Our broad product experience allows us to understand different application requirements and provide suitable solutions for customers.
Quality management is an important part of our production philosophy. Our company follows ISO9001 quality management system, ISO14001 environmental management system, and ISO45001 occupational health and safety management system standards.
These systems help us maintain stable production processes, responsible environmental practices, and safe manufacturing operations.
Different projects require different solutions. Some customers need standard RMU equipment, while others require customized designs based on special operating conditions.
Our engineering team provides customized support according to customer drawings, electrical parameters, installation requirements, and project specifications.
For overseas customers, we provide complete export support including technical communication, production scheduling, quality inspection, packaging, and transportation arrangements.
According to product size, order quantity, and destination, we select suitable transportation methods such as sea shipping, land transportation, or combined logistics.
| Service Item | Our Capability |
|---|---|
| Technical Support | Product selection and engineering communication |
| Manufacturing | Standard and customized production |
| Inspection | Factory testing before shipment |
| Packaging | Moisture-proof and impact protection |
| Delivery | International logistics coordination |
Source: Jihui Electric Group production capability and international service information.
It is a Medium Voltage Ring Main Unit solution that uses solid insulation technology to provide reliable electrical switching, distribution, and protection functions.
Solid insulation provides stable electrical performance, strong mechanical protection, and good resistance to environmental conditions. It also helps reduce maintenance requirements.
It is suitable for power grids, renewable energy projects, industrial facilities, commercial buildings, transportation systems, and infrastructure applications.
Yes. We provide customized solutions according to customer requirements, technical specifications, installation environment, and project conditions.
We control quality through engineering review, material inspection, standardized manufacturing, electrical testing, and final factory inspection.
We support international transportation through sea shipping, land transportation, and combined logistics according to customer requirements.
The development of modern energy systems requires electrical equipment that is safer, more efficient, and more adaptable. Customers need solutions that provide stable performance while supporting future power network development.
Our Solid Insulated Ring Main Unit Movement combines advanced insulation technology, professional manufacturing, and strict quality control to provide reliable medium voltage distribution solutions.
From industrial plants and renewable energy projects to urban power networks and infrastructure systems, Jihui Electric Group continues to support global customers with dependable electrical equipment.
We believe reliable power systems start with reliable equipment. Through continuous improvement and customer-focused service, we are committed to creating better medium voltage power distribution solutions for the future.
JiHui Electric Group Co., Ltd , high-end website construction, foreign trade website construction, marketing website construction, website optimization, development websites, corporate network marketing, search engine promotion, wechat mini program, corporate mailbox, short video operation, etc.
No. 161 Jingliu Road, Yueqing Economic Development Zone, Yueqing City, Zhejiang Province, China
jh.power@jihuielec.com
+86 18967711966
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