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ASNA Technology
Core advantages
Atmospheric Pressure
Atmospheric Pressure
No gas charging, no gauge pressure, no gas leakage.
Sealed Enclosure
Sealed Enclosure
Blocks external contaminants and maintains a stable operating environment.
Natural Air Insulation
Natural Air Insulation
SF₆ free, natural air insulation, self-healing system, environmentally-friendly, performance reliable.
Smart-grid Compatible
Smart-grid Compatible
Equipped with smart controlling and monitoring system, perfectly adapted to modern grid and renewable energy system infrastructure.
Flexible Configuration
Flexible Configuration
Full customization available to satisfy project specific technical requirements.
Low Cost of Ownership
Low Cost of Ownership
40 years maintenance free design, significantly reducing the operational expenses.
about HM POWER
The Global Pioneer of Atmospheric Pressure Sealed natural air Insulation Technology

Founded in 2009, HM Power (Guangdong) Co., Ltd. is headquartered in Guangdong Province, China, close to Shenzhen with convenient transportation and logistics access. Backed by its international China-Europe R&D team, the company focuses on green and intelligent power distribution technologies, continuously breaking through key technical bottlenecks.


It pioneered the ASNA (atmospheric pressure sealed natural air) insulated technology, which phases out SF₆ gas entirely at the source, enabling SF₆ free RMU solutions. The company delivers safer, more reliable and greener medium-voltage distribution solutions for customers worldwide.

Years Industry Experience
Cooperative Customers
A 30-days Production Cycle
Operated in Europe for 17+ Years
Main Product
ASNA RMU Product Center

HM POWER is a trusted ASNA RMU manufacturer, 

committed to the R&D of disruptive technological solutions for green and intelligent power distribution networks, as well as the manufacturing of key equipment like advanced medium-voltage RMUs. The products cover all voltage levels of 12 kV/24 kV, meeting the power distribution requirements under different scenarios and working conditions.
B Unit
Circuit-Breaker Unit
D Unit
Cable Feeder Unit
PT Unit
Busbar PT Unit
PTX Unit
Incoming PT Unit
BS Unit
Busbar Sectionalizer Unit
m Unit
Metering Unit
Become a Parnter

Join HM Power as a partner

The EU F-Gas Regulation (EU) 2024/573 has taken full effect. Fluorine free technology has become the consensus of the global power distribution industry. As the worldwide pioneer of ASNA atmospheric pressure sealed air-insulated technology, HM POWER Medium-Voltage Switchgear Manufacturer sincerely invites global partners to work hand in hand. With green environmental technologies, we facilitate the green transition of power grids, share market opportunities and advance sustainable development.

Contact us immediately

service and support

As one of the leading medium-voltage switchgear manufacturers, HM POWER has an outstanding team of experts to ensure the efficient advancement of the project, covering all aspects from project planning and delivery to after-sales training.

Qualification

Authoritative certifications to safeguard our customers’ interests.

To date, ASNA technology has secured more than 100 patents at home and abroad. Our management systems hold TÜV certification. The ASNA RMU / switchgears have passed rigorous testing at KEMA Labs and hold CE certification.

Application

Multi-scenario green power distribution demand solutions

HM Power is committed to providing customized SF₆ free RMU and green power distribution solutions for customers in various industries, while reducing operating costs and promoting environmental sustainability.
Power Grids
New Energy
Data Center
Transportation
Space Exploration
Industrial & Commercial
Public Infrastructure
Power grids and power companies
Facilitate the intelligent upgrade of distribution networks and ensure safe and reliable power supply.
New energy & Energy storage
Suitable for unattended operation and remote monitoring.
Data & Computing Power Center
Ensure the stable operation of the computing power cluster.
Transportation application
Safeguard the power supply of transportation hubs.
space exploration
Escort the core tasks of space exploration.
Industry & Commerce
Ensuring continuous power supply for production line buildings makes cost reduction and efficiency improvement more worry-free.
communal facilities
Safeguard the operation of municipal public services, ensuring stability, reliability and maintenance-free operation.
solution

ASNA RMU solution

Our portfolio offers flexible, configurable options tailored to on-site power distribution requirements. With high compatibility, it covers diverse application scenarios, ranging from basic ring main layouts to sophisticated self-healing systems.

Project specific custom design available

Modular architecture supports seamless future upgrades

Professional application guidance for various power supply scenarios

Project

Our projects around the world

With over 60,000 units of equipment operating globally without any faults, it has won the long-term trust of top projects and benchmark customers in various countries.

Smart City Distribution Project in Stockholm, Sweden
Stockholm, Sweden, is a benchmark for smart city and green low-carbon urban development in Northern Europe. It was awarded the world’s first "European Green Capital" title in 2010. As a key supporting initiative for the grid intelligence and urban low-carbon transition of Stockholm, this smart city power distribution project comprehensively improves the stability and environmental performance of urban public power supply and serves as an important pillar for long-term sustainable development.
Italy PCS Energy Storage Integrated Unit Power Distribution Project
Italy has witnessed rapid growth in installed capacity of wind and solar new energy, with steadily rising demand for energy storage on both grid-side and commercial & industrial sides. By charging and discharging to implement peak shaving and valley filling, energy storage systems effectively smooth grid fluctuations and reduce power consumption costs. As a critical component for grid connection, the medium-voltage switchgear supporting energy storage power stations is subject to growing attention on environmental compliance. Relevant EU greenhouse gas control regulations impose mandatory constraints on equipment selection. The EU F-Gas Regulation (EU) 2024/573 clearly stipulates that SF₆ greenhouse gas shall be prohibited for new medium-voltage switchgear with rated voltage ≤24kV starting from 1 January 2026.
Tesla Supercharger Station Power Distribution Project, Sweden
In 2014, the first batch of Tesla Superchargers in Västerås, Sweden, supporting this project was completed and put into operation. It serves as a highly representative energy replenishment infrastructure for new energy vehicles in Northern Europe. As a high-power dynamic electrical load scenario, the supercharger station imposes stringent requirements on the 10kV distribution system in terms of power supply reliability, equipment stability, fault handling capability and low-carbon compliance.
Tencent Data Center Power Distribution Project, Guizhou
Tencent Data Center in Guizhou is China’s first large-scale cave-type data center, undertaking core services including data storage and AI training. Power outages may result in data loss and computing capacity loss, so extremely high reliability requirements are imposed on power supply. Its unique geographic location also raises stringent requirements for anti-condensation performance and maintenance-free operation.
Power Distribution Project of Tanzania Sapphire Float Glass Industrial Park
The Tanzania Sapphire Float Glass Industrial Park is a benchmark project under China’s Belt and Road Initiative. The glass manufacturing process imposes extremely stringent requirements on power supply continuity, power quality and voltage stability. Meanwhile, the park features complex operating conditions including high temperature, high humidity, dust and tin fog corrosion, which pose severe challenges to the corrosion resistance and long-term operational reliability of power distribution equipment.
the latest news
News & Blogs

Explore the latest technological research and industry policy updates of HMPower.

National Little Giant Recognition:HM POWER’s journey as China’s top MV RMU manufacturer
In China's industrial policy framework, the designation of "National Little Giant" enterprise carries a specific and demanding meaning. The ...
Smart City Distribution Project in Stockholm, Sweden
Stockholm, Sweden, is a benchmark for smart city and green low-carbon urban development in Northern Europe. It was awarded the world’s first "European Green Capital" title in 2010. As a key supporting initiative for the grid intelligence and urban low-carbon transition of Stockholm, this smart city power distribution project comprehensively improves the stability and environmental performance of urban public power supply and serves as an important pillar for long-term sustainable development.
2026 09 30
Italy PCS Energy Storage Integrated Unit Power Distribution Project
Italy has witnessed rapid growth in installed capacity of wind and solar new energy, with steadily rising demand for energy storage on both grid-side and commercial & industrial sides. By charging and discharging to implement peak shaving and valley filling, energy storage systems effectively smooth grid fluctuations and reduce power consumption costs. As a critical component for grid connection, the medium-voltage switchgear supporting energy storage power stations is subject to growing attention on environmental compliance. Relevant EU greenhouse gas control regulations impose mandatory constraints on equipment selection. The EU F-Gas Regulation (EU) 2024/573 clearly stipulates that SF₆ greenhouse gas shall be prohibited for new medium-voltage switchgear with rated voltage ≤24kV starting from 1 January 2026.
2026 09 30
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Let's get in touch!

No matter which stage your project is at, our professional team of engineers can provide you with full-process professional support from product selection, solution design, factory visits to delivery and maintenance.

phone
+86 18138383310
email
sales@hmpower-global.com

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