The USRM6 series uses SF6 gas as the insulation medium, with the main circuit and related electrical components enclosed inside a sealed container. This structure minimizes the influence of dust, moisture, pollution, salt spray and other external environmental conditions, helping maintain stable electrical performance and improve operational safety. With its compact design, modular configuration and low maintenance requirements, the Usune Rmu Electrical 12kV SF6 Gas Insulated Switchgear is suitable for industrial facilities, mining areas, railway systems, airports, urban distribution networks, residential areas and other medium-voltage applications.
The USRM6 series adopts a fully insulated and enclosed design in which the main circuit components are protected inside an SF6 gas chamber. Compared with conventional air-insulated equipment, this structure reduces the influence of external environmental conditions on internal electrical components. Rmu Electrical 12kV SF6 Gas Insulated Switchgear is particularly suitable for underground substations, coastal regions, high-altitude areas and industrial environments where humidity, dust or pollution may affect conventional switchgear.
Usune Rmu Electrical 12kV SF6 Gas Insulated Switchgear adopts a standardized modular structure that allows different functional units to be combined according to specific project requirements. The expandable main bus system provides greater flexibility for power distribution system configuration, while the compact enclosure helps reduce the installation footprint. This makes the USRM6 series suitable for secondary transformer substations and terminal distribution networks where installation space is limited.
Because the primary electrical components are enclosed inside a sealed gas compartment, they are less exposed to dust, moisture and environmental contamination. This reduces routine maintenance requirements and helps maintain stable performance over long operating periods. For customers operating substations in remote or difficult-to-access locations, the low-maintenance structure can also help reduce inspection frequency and operating costs.
The fully enclosed structure provides additional protection for operators by keeping the main circuit components isolated from direct external contact. Combined with reliable insulation and modular switching functions, the USRM6 series provides a stable solution for medium-voltage power distribution systems that require continuous and safe operation.
Usune 12kV SF6 Gas Insulated Switchgear uses a compact sealed structure, allowing more electrical functions to be integrated into a relatively small installation area. Traditional air-insulated switchgear generally requires greater clearance between electrical components because air is used as the insulation medium. For urban substations, underground facilities and compact transformer stations, the smaller footprint of SF6 GIS provides greater flexibility during equipment layout and installation.
The main circuit of the USRM6 series is enclosed inside a sealed gas compartment, reducing direct exposure to dust, moisture, pollution and salt spray. Air-insulated switchgear is more dependent on the surrounding installation environment and may require additional protection or regular cleaning in polluted or humid locations. Therefore, SF6 Gas Insulated Switchgear is particularly suitable for challenging environmental conditions.
The enclosed design of Rmu Electrical 12kV SF6 Gas Insulated Switchgear reduces the exposure of internal electrical components to external contamination, resulting in lower routine maintenance requirements. Traditional air-insulated equipment may require more frequent inspection, cleaning and environmental protection depending on the installation conditions. This difference can be important for customers looking to reduce long-term maintenance workload and operating costs.
Air-insulated switchgear remains suitable for many conventional power distribution applications, while SF6 Gas Insulated Switchgear provides additional advantages where space, environmental protection and reliability are important considerations. The modular configuration of the Usune USRM6 series allows customers to select suitable functional combinations according to different power distribution requirements.
The USRM6 series is designed around standardized modules that can be configured according to different distribution network requirements. Customers can select suitable functional combinations for incoming, outgoing, protection and transformer connection applications, while the expandable main bus design provides additional flexibility when system capacity or network configuration needs to change.
This modular approach allows Usune SF6 Gas Insulated Switchgear to serve different types of secondary substations and terminal distribution networks without requiring a completely different equipment structure for every project.
| 1 | Rated voltage | kV | 12/24 | 12/24 | 12/24 |
| 2 | Rated frequency | Hz | 50 | 50 | 50 |
| 3 | Rated current | A | 630 | 125 (depends on fuse current) | 630 |
| 4 | Rated insulation level‑1min Frequency withstand voltage‑Inter phase, ground | kV | 42/65 | 42/65 | 42/65 |
| Rated insulation level‑1min Frequency withstand voltage‑isolating distance | kV | 48/79 | 48/79 | 48/79 | |
| Rated insulation level‑1min Frequency withstand voltage‑Controlling and auxiliary circuit | kV | 2/2 | 2/2 | 2/2 | |
| Rated insulation level‑Lighting impulse withstand voltage‑Inter phase, ground | kV | 75/125 | 75/125 | 75/125 | |
| Rated insulation level‑Lighting impulse withstand voltage‑isolating distance | kV | 85/145 | 85/145 | 85/145 | |
| 5 | Rated short circuit withstand current | kA/s | 25/4 | —— | 25/4 |
| 6 | Rated peak withstand current | kA | 63 | —— | 63 |
| 7 | Rated short circuit making current | kA | 63 | Limited by HV fuse | 63 |
| 8 | Rated short circuit breaking current | kA | —— | Limited by HV fuse | 25/25 |
| 9 | Rated transmission current | A | —— | 1700/1400 | —— |
| 10 | Rated active load breaking current | A | 630 | —— | —— |
| 11 | Rated closed‑loop breaking current | A | 630 | —— | 630 |
| 12 | Mechanical life‑load break switch/CB | Times | 10000 | 10000 | 20000 |
| Mechanical life‑Isolation/ground switch | Times | 5000 | 5000 | 5000 | |
| 13 | Circuit resistance | μΩ | ≤150 | —— | ≤150 |
| 14 | Rated charging pressure（20℃ gauge pressure） | MPa | 0.04 | 0.04 | 0.04 |
| 15 | Gas annual relative leakage rate | % | 0.05 | 0.05 | 0.05 |
| 16 | IP protection degree‑Cabinet | IP4X | IP4X | IP4X | |
| IP protection degree‑Gas tank | IP67 | IP67 | IP67 |
An industrial customer selected Usune 12kV SF6 Gas Insulated Switchgear for a medium-voltage distribution system where space and continuous operation were key concerns. After installation, the customer reported that the compact structure made equipment layout easier and appreciated the enclosed design for reducing the impact of dust and environmental contamination.
A customer used the USRM6 series in an underground transformer substation with limited installation space and high humidity. After commissioning, the customer feedback highlighted the switchgear's compact footprint, stable operation and low routine maintenance requirements.
For a coastal power distribution application, the customer required switchgear with good environmental adaptability. The customer selected Usune SF6 Gas Insulated Switchgear because its sealed structure helps protect the primary circuit from humidity, salt spray and pollution. During operation, the customer positively evaluated its enclosed design and stable performance.
Based on these applications, customers mainly value the compact design, sealed SF6 insulation structure, reliable operation and low maintenance requirements of the Usune USRM6 series. These advantages make it suitable for industrial facilities, underground substations, coastal projects and other demanding medium-voltage applications.
Zhejiang Usune Electric Co.,Ltd. has established a comprehensive management system in accordance with ISO 9001 Quality Management System, ISO 14001 Environmental Management System, and ISO 45001 Occupational Health and Safety Management System. These management systems support consistent product quality, responsible environmental practices and safe manufacturing operations throughout the production process.
To meet the requirements of different international markets, Usune 12kV SF6 Gas Insulated Switchgear has undergone relevant type tests in accordance with applicable IEC and GB standards and has obtained CE certification. These certifications and testing requirements provide additional assurance for customers evaluating the switchgear for medium-voltage power distribution projects.
For international projects, Usune can provide relevant technical documents, type test reports and certification information according to the specific product configuration and market requirements, helping customers complete product evaluation, technical approval and procurement more efficiently.
Zhejiang Usune Electric Co.,Ltd. focuses on medium-voltage electrical equipment and power distribution solutions, including 12kV, 24kV and 36kV SF6 Gas Insulated Switchgear. As a professional manufacturer, Usune combines product design, manufacturing and quality management to provide medium-voltage switchgear solutions for industrial, infrastructure and power distribution applications.
For international buyers, Usune can provide suitable switchgear configurations according to project voltage, installation environment, distribution network structure and functional requirements. The USRM6 series combines compact construction, modular configuration, environmental adaptability and low maintenance requirements, making it a practical choice for modern medium-voltage power distribution systems.
Rmu Electrical 12kV SF6 Gas Insulated Switchgear is a medium-voltage electrical distribution device that uses SF6 gas as the insulation medium. Its main electrical components are enclosed inside a sealed housing, providing insulation and protection while integrating switching, protection, measurement and monitoring functions into a compact system.
The main advantages include a compact structure, reliable insulation, strong environmental adaptability and low maintenance requirements. Because the primary circuit is enclosed inside a sealed gas compartment, the equipment is less affected by dust, humidity, pollution and other external environmental conditions.
The USRM6 series can be used in industrial and mining facilities, railway systems, airports, urban power distribution networks, residential areas, underground substations and other medium-voltage applications. It is especially suitable for projects where installation space, environmental conditions and operational reliability are important considerations.
The sealed structure significantly reduces exposure of internal electrical components to external contamination, so the equipment generally requires less routine maintenance than conventional air-insulated switchgear. Maintenance and inspection should still be performed according to the equipment manufacturer's instructions and applicable electrical safety requirements.
Yes. The USRM6 series adopts a modular design that allows different functional units to be combined according to project requirements. The expandable main bus configuration also provides flexibility for different medium-voltage distribution network arrangements.
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