12kV 1250A ASNA Switchgear/RMU
12kV 1250A Atmospheric pressure sealed nature-air insulated switchgear/RMU, with a current of 1250A, can carry more loads and meet the demands of future green and smart distribution networks. There is no SF6 or synthetic gas. Only nature air is used for insulation, Comply with the F-Gas regulation (EU) 2024/573
5.0
Rated continuous current(Ir):
1250A
Rated frequency(fr):
50hz
Rated voltage(Ur):
12kv
design customization
Please fill out the form below to request a quote or to request more information about us. Please be sure to upload customized requirement documents or pictures, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
Please fill out the form below to request a quote or to request more information about us. please be as detailed as possible in your message, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
HMpower is made with the progressive technology and quality assured materials.
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
Air-insulated, greenhouse gases free, Comply with the F-Gas regulation (EU) 2024/573.
The sealed cabinet is sealed under atmospheric pressure, avoiding the risk of insulation performance decline due to pressure leakage.
The current is 1250A, which can carry more loads.
The operating mechanism is stable, and the mechanical life can reach 10,000 times.
Single-phase insulation technology eliminate sudden short-circuit faults between phases.
Parameters
Name |
Unit |
Smart Ring |
|||
Rated voltage(Ur) |
kV |
12 |
|||
Rated frequency(fr) |
Hz |
50 |
|||
Rated continuous current(Ir) |
A |
1250 |
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 |
31.5 / 25 |
20 / 25 |
||
Rated short-time of short-circuit(tk) |
s |
4 |
|||
Rated peak withstand current(Ip) |
kA |
80 / 63 |
50 / 63 |
||
Rated short-circuit breaking current(Isc) |
kA |
31.5 / 25 |
20 / 25 |
||
Rated short-circuit making current(Ima) |
Vacuum interrupter |
kA |
80 / 63 |
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 |
|||
|
Low voltage chamber not included |
B |
Circuit-breaker unit |
W(mm) |
550 |
460 |
PTB |
CB unit with PT |
750 |
-- |
||
D |
Cable connection unit |
450~550 |
-- |
||
PT |
Busbar PT unit |
600 |
-- |
||
BS |
Busbar Sectionliser unit |
1000 |
-- |
||
-- |
-- |
D(mm) |
900 |
||
-- |
-- |
H(mm) |
1810 |
||
FAQ
-
How does the RMU ensures safe and reliable operation?
A:The ASNA 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 -
What is the installation requirement?
A:The ASNA RMU is a fixed structure that can be installed next to the wall, and the operating space of 80CM is retained in front of the RMU. Cable installation adopts the way of bottom in and bottom out. If you need other installation methods, please contact us. -
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. -
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.
In order to meet the international quality standards, this product has passed strict quality inspection procedures.
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