I. Overview
The independently developed JHSRM16-12 inflatable SF6 metal enclosed full insulation series ring main switch cabinet has passed the type test of the National High Voltage Apparatus Test Center and been listed as a high-tech product in Zhejiang Province for the Zhejiang Province High tech Technology Project. The product is widely used in 10kV/6kV distribution systems and is a switch product for various urban and rural users' power transformation and distribution systems. The switchgear adopts a modular unit mode, which can be combined according to different purposes; There are two main types of fixed unit combinations and expandable units, which meet the requirements of various substations for compact opening
The need for flexible use of cabinets. The JHSRM16-12 inflatable switchgear is a completely sealed system, with its electrical components and switches enclosed within a stainless steel body. The entire switch device is not affected by external environmental conditions, ensuring operational reliability and personal safety. And it has achieved maintenance free operation. By selecting expandable busbars, any combination can be achieved to achieve full modularity. Expanding the safety insulation and shielding of the busbar ensures reliability and safety. The JHSRM16-12 inflatable switchgear can also provide a TV based automation solution, forming the concept of intelligent switches and minimizing on-site installation and commissioning workload.
The HSRM16-12 inflatable switchgear is divided into non expandable standard configuration and expandable standard configuration. Due to its combination of full and half modules and self scalability, it has extremely special flexibility.
The design lifespan for operation under indoor conditions (20 ° C) exceeds 30 years.
Transformer/Line Protection
JHSRM16-12 inflatable cabinet provides two types of transformer protection: load switch fuse combination device and circuit breaker with relay protection.
Use load switch fuse combination electrical module
The combination of current limiting high-voltage fuses and load switches for transformer protection. The fuse compartment will be installed behind a separate, locked enclosure located at the front of the unit. The load switch uses a spring energy storage mechanism, which can be triggered by a fuse striker.
In order to facilitate the replacement of fuses. You can use the operating handle to remove the end cover of the fuse chamber. The pre installed tripping mechanism of the fuse ensures the waterproof performance of the entire system.
II. Main features of the product
Operational Security
We can provide special security protection for users through the following security measures:. Integrated three station load switch
-- Circuit breakers use load switches instead of isolation switches for greater safety and reliability
-- One side fully enclosed design
-- Mechanical interlocking that meets the five prevention requirements
-- Live display can provide live indication for incoming and outgoing lines
Reliable operation
-- Fully enclosed design, all 10KV switches and busbar live parts are sealed in a 3mm stainless steel welded gas box; Equipped with silicone rubber cable plugs to achieve full insulation and sealing of cable heads, thus avoiding external environmental influences such as dust, moisture, and small animals
-- Spring energy storage operating mechanism, can be operated manually or electrically
-- Panel simulation line diagram provides switch position indication
-- The cabinet is made of galvanized sheet metal, with surface electrostatic spraying to enhance corrosion resistance
-- Safe pressure range of SF6 gas inside the pressure gauge monitoring box
Economy:
-- Maintenance free
-- Highly reliable
-- The service life can reach 20 years
Flexible plan
-- Multiple entry methods can be used to achieve left, right, up, or forward lines.
-- Multiple combination methods can be used, and any combination between units can be achieved.
-- By using insulated busbars, it is possible to achieve front and rear parallel cabinets or left and right parallel cabinets
-- Flexible design scheme
Widely used
-- The feeder line has a large capacity and occupies a small area, suitable for various application needs
III. Design Specifications
-- Technical Description
The JHSRM16-12 series inflatable switchgear is installed on a galvanized sheet frame, with the switch unit inside an SF6 gas box made of corrosion-resistant and non-magnetic 3mm thick stainless steel plate.
SF6 gas tank is a "sealed pressure system" that can operate for 20 years under normal working conditions. The pressure of SF6 gas during normal operation is 0.15~0.4 bar. The gas box is equipped with a pressure release device, which ensures that gas can be released from the bottom or rear when the pressure is too high.
-- Switching unit
The load switch adopts a coaxial rotating double break method, which cooperates with the sliding plate through the same operating hole for kinetic operation. Therefore, the switch can only be in one of the three states of "closing, opening, and grounding" at any time, completely avoiding misoperation.
-- Operating mechanism
The operating mechanism of the switch is installed at the front of the air box and has undergone special processing to prevent rust and corrosion. It is convenient for manual operation and maintenance and easy to achieve electric operation.
| Model | Size |
| SRM16-12/24 | 130*100*200cm |
12/24kV Full Sealed Inflatable Ring Main Unit Switchgear for Reliable Medium Voltage Power Distribution
At Jihui Electric Group Co., Ltd., we specialize in the research, development, manufacturing, and service of medium and low voltage power transmission and distribution equipment up to 35kV. With years of experience in electrical equipment manufacturing, we provide reliable solutions for power companies, engineering contractors, industrial customers, renewable energy projects, and infrastructure developers worldwide.
Our 12/24kV Full Sealed Inflatable Ring Main Unit Switchgear is designed to meet the growing demand for safe, compact, and stable medium voltage distribution systems. The product combines a fully sealed gas insulation structure, high mechanical strength enclosure, and flexible switching configuration to support different power distribution applications.
In modern electrical networks, stable power supply is essential. Whether the equipment is installed in an industrial factory, urban distribution network, commercial building, renewable energy station, or transportation project, the switchgear must operate safely under different environmental conditions.
Based on our practical manufacturing experience, we developed this ring main unit switchgear with a focus on long service life, easy installation, reliable protection, and reduced maintenance requirements. Our goal is not only to supply electrical equipment, but also to provide customers with complete medium voltage power distribution solutions.
A Ring Main Unit (RMU) is an important component used in medium voltage electrical distribution systems. It is mainly used for power switching, circuit protection, and electricity distribution between incoming and outgoing lines.
The 12/24kV Full Sealed Inflatable Ring Main Unit Switchgear belongs to gas insulated medium voltage switchgear. Its main electrical components are installed inside a sealed metal enclosure filled with insulating gas. This design creates a protected operating environment for switching devices and electrical connections.
Compared with traditional air insulated switchgear, a full sealed inflatable structure can provide better protection against dust, moisture, pollution, and external environmental influence. This makes it suitable for locations where space is limited or where stable operation is required for many years.
For customers searching for a reliable 12kV Gas Insulated Ring Main Unit, 24kV RMU switchgear, or Medium Voltage Ring Main Unit supplier, our products provide a practical solution for modern distribution networks.
The working principle of our RMU switchgear is based on controlling and protecting electrical power flow in medium voltage systems.
When electricity enters the distribution network, the incoming cable connects to the ring main unit. The internal switching components control whether electrical power is connected, isolated, or transferred to different outgoing circuits.
During normal operation, the switchgear allows electricity to flow safely through the distribution system. When abnormal conditions occur, such as overload or short circuit faults, the protection devices can quickly disconnect the affected section.
By isolating the fault area, the remaining electrical network can continue operating normally. This helps improve power supply reliability and reduce unnecessary downtime.
| Process | Description | Customer Value |
|---|---|---|
| Power Receiving | The incoming cable transfers medium voltage power into the switchgear. | Provides stable connection between power sources and distribution systems. |
| Switching Control | The internal switching mechanism controls circuit connection and isolation. | Allows flexible operation and easier system management. |
| Protection Response | The protection unit reacts when abnormal electrical conditions appear. | Helps prevent equipment damage and improves network safety. |
| Power Distribution | The outgoing circuits supply electricity to different application areas. | Supports industrial, commercial, and infrastructure power needs. |
Source: Working principle based on IEC 62271 series medium voltage switchgear standards and common RMU engineering design practices.
The biggest feature of our ring main unit switchgear is the fully sealed design. All important electrical components are protected inside a closed metal chamber.
This structure reduces the influence of external conditions such as humidity, dust, and pollution. As a result, the equipment can maintain stable electrical performance in different environments.
For areas with high humidity, coastal climates, industrial pollution, or limited installation space, the sealed structure provides additional protection compared with conventional open designs.
Modern cities and industrial projects often have limited space for electrical equipment installation. Our compact RMU structure helps customers reduce installation area while maintaining reliable power distribution performance.
The smaller footprint makes the equipment suitable for underground substations, urban power networks, commercial buildings, and renewable energy facilities.
Stable insulation is essential for medium voltage equipment. Our gas insulated design improves insulation performance between electrical components and helps maintain safe operation under rated voltage conditions.
The equipment is designed according to technical requirements for medium voltage distribution applications, providing reliable performance during long-term operation.
Different projects have different electrical requirements. We provide flexible configuration options according to customer needs, including switching functions, cable connection methods, protection requirements, and installation conditions.
Our engineering team works with customers to confirm technical parameters before production, helping ensure that the final equipment matches the actual application environment.
Power distribution equipment may operate in different environments, including factories, renewable energy plants, urban networks, and infrastructure projects.
Our full sealed inflatable ring main unit switchgear is designed to provide stable performance in indoor applications and protected outdoor environments where reliable medium voltage distribution is required.
When selecting Medium Voltage Electrical Equipment, customers usually focus on safety, reliability, maintenance cost, and long-term operation performance.
Through continuous improvement in product design and manufacturing processes, our 12/24kV RMU switchgear provides several practical advantages.
| Comparison Item | Traditional Air Insulated Switchgear | Our Full Sealed Inflatable RMU Switchgear |
|---|---|---|
| Protection Against Environment | More affected by dust and humidity | Sealed structure improves environmental protection |
| Installation Space | Requires larger installation area | Compact design saves space |
| Maintenance Requirement | Requires more regular inspection | Reduced maintenance demand through sealed design |
| Application Range | Mainly standard indoor applications | Suitable for industrial, urban, and renewable energy projects |
Source: Comparison based on general medium voltage switchgear characteristics and engineering application experience.
The power industry is changing rapidly. With the development of renewable energy, smart grids, electric transportation, and industrial automation, customers require electrical equipment that is safer, smaller, and more reliable.
Our 12/24kV Full Sealed Inflatable Ring Main Unit Switchgear is developed to support these changing requirements.
From urban power distribution systems to industrial production facilities, we focus on providing equipment that helps customers build safer and more efficient electrical networks.
At Jihui Electric, we believe that reliable power equipment starts with careful design, strict manufacturing control, and continuous improvement.
During our years of manufacturing medium voltage power distribution equipment, we have worked with customers from different industries and understand that every project has unique electrical requirements. Our 12/24kV Full Sealed Inflatable Ring Main Unit Switchgear is designed to provide stable power control and protection for various applications where safe and continuous electricity supply is important.
Power companies and utility operators require equipment that can operate reliably for long periods with minimal interruption. Our medium voltage ring main unit is commonly used in distribution networks to connect power sources, control circuits, and improve system reliability.
The sealed gas insulated structure helps maintain stable performance in urban areas, underground power facilities, and distribution stations where environmental conditions may change.
The rapid growth of renewable energy requires dependable electrical connection and distribution solutions. Solar farms, wind power stations, and energy storage projects need medium voltage equipment that can handle changing power conditions while maintaining safe operation.
Our 12kV gas insulated ring main unit and 24kV RMU switchgear can be integrated into renewable energy distribution systems to support efficient power transmission and grid connection.
Factories often require continuous power supply for production lines, automation equipment, and heavy machinery. Unexpected power failures can result in production delays and economic losses.
Our ring main unit switchgear helps industrial customers achieve safer power distribution by providing reliable switching, isolation, and protection functions.
Typical applications include:
Automotive manufacturing plants
Machinery production facilities
Electronic manufacturing factories
Steel and metal processing plants
Chemical industry facilities
Modern commercial buildings require compact electrical equipment due to limited installation space. Shopping centers, office buildings, hotels, airports, and public facilities need reliable medium voltage distribution systems.
The compact design of our full sealed inflatable RMU switchgear makes it suitable for urban power distribution projects where space utilization and safety are both important.
Transportation infrastructure such as rail transit systems, metro stations, ports, and airports require stable electrical systems.
Our medium voltage switchgear provides dependable power control solutions for these facilities and helps maintain continuous operation of important electrical loads.
At Jihui Electric Group Co., Ltd., we believe that product reliability comes from every manufacturing step. From material selection to final inspection, we control important details to ensure that each unit meets technical requirements.
Before production begins, our engineering team reviews customer requirements, including voltage level, installation environment, protection requirements, and project standards.
For customized projects, we communicate with customers to confirm electrical parameters and configuration details. This helps avoid design differences and ensures the final product matches the actual application.
The performance of medium voltage switchgear depends greatly on material quality. We select suitable materials for the enclosure, electrical components, insulation parts, and mechanical structures according to product requirements.
The metal enclosure is manufactured with attention to mechanical strength and protection performance, helping the equipment maintain stable operation during long-term service.
The assembly process requires accurate installation of switching components, electrical connections, and internal mechanisms.
Our production technicians follow standardized procedures to ensure that each component is correctly installed and adjusted.
Before delivery, every switchgear unit undergoes inspection and testing procedures.
The testing process includes checking electrical connections, insulation performance, mechanical operation, and overall product condition.
| Inspection Item | Purpose | Quality Control Value |
|---|---|---|
| Visual Inspection | Check appearance, structure, and assembly quality | Ensures manufacturing consistency |
| Mechanical Operation Test | Verify switching mechanism performance | Improves operational reliability |
| Electrical Test | Check insulation and electrical performance | Ensures safe operation |
| Factory Acceptance Inspection | Confirm product meets delivery requirements | Provides confidence before shipment |
Source: Jihui Electric manufacturing procedures and standard medium voltage switchgear quality inspection practices.
Choosing a medium voltage equipment supplier is not only about purchasing a product. It is about finding a partner who understands electrical applications, project requirements, delivery schedules, and long-term cooperation.
Jihui Electric Group Co., Ltd. focuses on medium and low voltage power transmission and distribution equipment up to 35kV.
Our product portfolio includes:
Ring Main Unit Switchgear
Gas Insulated Switchgear
Solid Insulated RMU
Combination Transformers
We operate according to international management system requirements, including:
ISO9001 Quality Management System
ISO14001 Environmental Management System
ISO45001 Occupational Health and Safety Management System
These systems guide our daily production, quality control, environmental management, and workplace safety practices.
Different customers have different requirements. A power company may need grid distribution equipment, while an industrial customer may require customized protection and installation solutions.
Our engineering team provides technical support based on project conditions, helping customers select suitable configurations.
We understand that international projects require accurate delivery planning.
According to product type, quantity, and destination, we arrange suitable transportation methods including sea transportation, land transportation, or combined logistics solutions.
Before shipment, products are professionally packed with protection against moisture, impact, and transportation risks.
A ring main unit switchgear is mainly used for medium voltage power distribution, circuit switching, and fault protection. It helps control electricity flow and isolate abnormal sections to improve network reliability.
The main difference is the rated voltage level. A 12kV RMU is commonly used in standard medium voltage distribution networks, while a 24kV RMU is suitable for applications requiring higher voltage capacity.
Gas insulated RMU provides a sealed operating environment, reducing the influence of dust, moisture, and pollution. It also offers a compact structure, making it suitable for projects with limited installation space.
Yes. We can provide customized solutions according to customer requirements, including voltage level, configuration, installation conditions, and project specifications.
Jihui Electric has obtained ISO9001 quality management system certification, ISO14001 environmental management system certification, and ISO45001 occupational health and safety management system certification.
As electrical networks become more complex, customers need equipment that provides safety, reliability, and long-term value.
Our 12/24kV Full Sealed Inflatable Ring Main Unit Switchgear combines compact design, stable insulation performance, flexible configuration, and reliable protection functions to support modern power distribution applications.
At Jihui Electric Group Co., Ltd., we continue to improve our manufacturing capabilities and technical services to support customers in power energy, renewable energy, industrial manufacturing, transportation, and infrastructure industries.
Whether you are planning a new distribution project or upgrading an existing electrical system, we are ready to provide professional medium voltage power distribution solutions based on your actual requirements.
Contact Jihui Electric for more information about our 12/24kV Full Sealed Inflatable Ring Main Unit Switchgear, gas insulated switchgear solutions, and customized medium voltage electrical equipment.
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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