12kV 630A medium voltage ASNA Switchgear/RMU
12kV 630A Atmospheric pressure Sealed Nature-air insulated switchgear/RMU, compact design,no air leakage, no air charging, no maintenance for life span, single phase insulation structure design to eradicate short-circuit between phases completely, is a full CB solution for future grid.
5.0
design customization
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The product shows great value in the industry and is bound to meet the specific requirements of customers.
Specifications
The RMU is equipped with a single-phase insulation system, which allows for easy fault isolation and effectively prevents phase-to-phase arc faults without disrupting the overall operation of the entire system. This feature makes it a safer and more reliable choice for power distribution scenarios.
-Rated voltage: 12kV
-Rated current: 630A
What is ASNA RMU?
» ASNA means:Atmospheric pressure Sealed Nature-Air insulated RMU
» ASNA is a brand new type of RMU that uses nature-air as the main insulation medium.
» Its main electrical circuits are sealed within an Atmospheric pressure sealed cabinet that maintains the same pressure as the surrounding environment and is equipped with filtration and pressure balance functions.
» During its entire life cycle, there is no risk of air leakage, no need for pressure monitoring, and it can prevent dust, solid particles, salt fog particles, etc. from entering the sealed cabinet .
Advantages
▬
World's first atmospheric pressure sealed technology
The RMU is fitted with a sealed air tank, where the internal air pressure is balanced with the external atmospheric pressure. This unique design completely eliminates the risk of gas leakage, and there is no need for gas replenishment or frequent maintenance. It effectively addresses the common problems that plague traditional gas-insulated switchgear.
▬
Aligned with global zero-carbon initiatives
By utilizing atmospheric air instead of industrially manufactured gases, this RMU produces no greenhouse gas emissions. It also eliminates the need for gas recovery and disposal processes. Our RMU actively supports the global initiative to phase out SF6 gas, making it an environmentally responsible option for building sustainable power distribution systems.
▬
Compact design
Despite being an air-insulated device, the RMU is designed to be just as compact as traditional gas-insulated units. This compactness enables easy on-site replacement of older switchgear systems. Additionally, its modular design helps lower overall project costs by reducing space requirements and simplifying the installation process.
▬
High environmental adaptability
The RMU has demonstrated excellent performance in a wide range of environmental conditions. It has accumulated extensive operational experience in areas with extreme temperatures, high humidity, and heavy dust. This strong adaptability makes it suitable for diverse global applications, ensuring reliable operation even in challenging environmental settings.
Reliability
▬
Reinforced structural design
Our RMU is integrated with a pressure balance device inside the sealed air tank, and this device includes an air filtration system. This configuration ensures that the air inside the tank remains clean and is not affected by external pollutants like dust or salt fog. It creates a controlled internal environment for the main circuit, thereby guaranteeing continuous and reliable performance of the RMU.
▬
High safe insulation system
Developed to operate reliably for 40 years under harsh conditions, our single-phase insulation system is designed with multiple layers of safety margins. This design completely eliminates the risk of phase-to-phase arc explosions. The cabinet casing and all internal non-conductive components are securely grounded. Since 2010, over 50,000 units of this RMU have been deployed globally, with applications across Asia, Europe, and Africa, and none of these units have experienced any faults.
▬
Reliable operating mechanism
The circuit breaker mechanism and the three-position isolator/grounding switch are designed with simplicity, compactness, and reliability as core principles. The circuit breaker can withstand more than 10,000 mechanical operations, while the isolator/grounding switch has a service life of over 3,000 operations. These features ensure long-term operational reliability of the RMU.
Applications
☑ The Atmospheric Pressure Sealed Nature-Air Insulated RMU/Switchgear finds wide application across multiple industries, including airports, government buildings, ports, hospitals, data centers, commercial properties, and transportation systems.
☑ Owing to its compact size and maintenance-free design, this RMU is highly suitable for deployment in remote locations-areas that typically require more labor for equipment maintenance, and the RMU's low-maintenance feature effectively addresses this challenge.
☑ Additionally, the Atmospheric Pressure Sealed Nature-Air Insulated RMU/Switchgear can be transformed into a street light box. This modified unit not only supplies electricity to street lamps but also serves as an attractive street decoration once night falls.
010203
Name |
Unit |
Smart Ring |
||
Rated voltage(Ur) |
kV |
12 |
||
Rated frequency(fr) |
Hz |
50 |
||
Rated continuous current(lr) |
A |
630 |
||
Rated short-duration power-frequency withstand voltage(Ud) |
Common value |
kV |
28 |
|
Across the isolating distance |
32 |
|||
Rated lightning impulse withstand voltage(Up) |
Common value |
kV |
75 |
|
Across the isolating distance |
85 |
|||
Rated short-time withstand current(Ik) |
kA |
20 / 25 |
||
Rated short-time of short-circuit(tk) |
s |
4 |
||
Rated peak withstand current(Ip) |
kA |
50 / 63 |
||
Rated short-circuit breaking current(Isc) |
kA |
20 / 25 |
||
Rated short-circuit making current(Ima) |
Vacuum interrupter |
kA |
50 / 63 |
|
Earth Switch | ||||
Mechanical endurance |
Circuit-breaker |
time |
10000 |
|
Isolator |
time |
3000 |
||
Earthing Switch |
time |
3000 |
||
Electrical endurance |
Circuit-breaker |
class |
E2 |
|
Earthing Switch |
class |
E2 |
||
Degree of protection by enclosure |
|
IP 4X |
||
Degree of protection by fully sealed tank |
|
IP 65 |
||
|
Dimensions Low voltage chamber not included |
B |
Circuit-breaker unit |
W(mm) |
460 |
BB |
Circuit-breaker unit with 2 in 1 |
810 |
||
BBB |
Circuit-breaker unit with 3 in 1 |
1160 |
||
BS |
Busbar Sectionliser unit |
810 |
||
M |
Metering unit |
810 |
||
D |
Cable connection unit |
460 |
||
PTB |
CB unit with PT |
810 |
||
PTX |
Incoming PT unit |
600 |
||
PT |
Busbar PT unit |
600 |
||
-- |
-- |
D(mm) |
800,8601) |
|
-- |
-- |
H(mm) |
1640,19402) |
|
1) 860mm is the depth of the metering unit
2) 1940mm is the height of the incoming PT unit
B(Circuit-breaker unit)
BB(CB unit with2 in 1)
BBB(CB unit with 3in 1)
D(Cable connection unit)
BS(Busbar Sectionliser unit)
PTB(CB unit with PT)
PTX(Incoming PTunit)
PT(Busbar PTunit)
PT(Busbar PTunit)
M(Metering unit)
Note: "↠" and "↞" in the diagram are expandable kits.
Flexible combination can be customized as request. Please consult the manufacturer if you have any question.
More About
01
/
How does the RMU ensures safe and reliable operation?
A1: The RMU achieves safe and reliable operation through three key aspects:
First, its atmospheric pressure fully sealed system acts as a protective barrier, shielding the RMU from external environmental influences and ensuring stable operation at all times.
Second, the single-phase insulation design inside the switchgear eliminates the risk of internal arcing explosions, further enhancing operational safety.
Third, the insulation medium used inside the cabinet is atmospheric pressure air, which prevents the insulation performance from deteriorating due to pressure leaks throughout the RMU's service life.
First, its atmospheric pressure fully sealed system acts as a protective barrier, shielding the RMU from external environmental influences and ensuring stable operation at all times.
Second, the single-phase insulation design inside the switchgear eliminates the risk of internal arcing explosions, further enhancing operational safety.
Third, the insulation medium used inside the cabinet is atmospheric pressure air, which prevents the insulation performance from deteriorating due to pressure leaks throughout the RMU's service life.
02
/
What is the status of Atmospheric Pressure Sealed Nature-Air Insulated RMU/Switchgear in China?
A2: In China, the Atmospheric Pressure Sealed Nature-Air Insulated RMU has become a widely adopted solution in the power distribution networks of the country's two largest state-owned grid enterprises: State Grid Corporation of China (SGCC) and China Southern Power Grid (CSG).
Since it was included in their procurement catalogs in 2017, this air-insulated RMU has been recognized as a standard product. Both SGCC and CSG conduct large-scale purchases of this RMU every year. This widespread adoption marks a significant milestone in the promotion of the product across China, and it further solidifies the RMU's position as a reliable and environmentally friendly choice for modern power distribution systems.
Since it was included in their procurement catalogs in 2017, this air-insulated RMU has been recognized as a standard product. Both SGCC and CSG conduct large-scale purchases of this RMU every year. This widespread adoption marks a significant milestone in the promotion of the product across China, and it further solidifies the RMU's position as a reliable and environmentally friendly choice for modern power distribution systems.
03
/
What is the installation requirement?
A3: The RMU can be installed in a wall-mounted manner. During installation, a space of 80cm must be reserved in front of the cabinet to ensure smooth installation operations and subsequent maintenance work.
In terms of cable connection, the switchgear adopts a lower incoming and lower outgoing cable layout. If you have specific requirements for other installation methods, please feel free to contact us, and our team will provide professional support.
In terms of cable connection, the switchgear adopts a lower incoming and lower outgoing cable layout. If you have specific requirements for other installation methods, please feel free to contact us, and our team will provide professional support.
04
/
Is there any possibility of combining the HM POWER's RMU with other brands' switchgear?
A4: We do not recommend combining HM POWER's RMU with switchgear from other brands. The reason is that different brands of switchgear vary in their plug designs, circuit configurations, and electrical parameter matching.
Combining switchgear from different brands may lead to compatibility issues, which can not only affect the normal operation of the power system but also pose potential safety risks such as electrical faults or equipment damage. For the safety and stability of your power distribution system, it is best to use switchgear from the same brand.
Combining switchgear from different brands may lead to compatibility issues, which can not only affect the normal operation of the power system but also pose potential safety risks such as electrical faults or equipment damage. For the safety and stability of your power distribution system, it is best to use switchgear from the same brand.
description2
Over the years in the market of HMpower, HM Power (Guangdong) Co., Ltd. seldom receive complaints from our customers for quality.
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