12kV 24kV 36kV Pure air/Nitrogen Insulated Ring Main Unit(RMU) Ensuring Stable Power
Key attributes
| Brand | ROCKWILL |
| Model NO. | 12kV 24kV 36kV Maintenance-Free Pure air/Nitrogen Insulated Ring Main Unit(RMU) |
| Rated voltage | 12kV |
| Rated normal current | 630A |
| Rated frequency | 50/60Hz |
| Series | REC |
Product descriptions from the supplier
Description：
ROCKWILL® attaches great importance to product quality and manufacturing technology, and treats every step of product production with precision and meticulousness. Only insulation gas is used to comprehensively compare heating dry air, nitrogen, carbon dioxide, and pure air. Pure air synthesized with extremely low moisture content and high purity is selected as the preferred insulation gas to replace SF6. The core switch unit of the product adopts a brand new vacuum arc extinguishing chamber soft package casting process, combined with a carefully designed rotating three-position switch, with a simple and compact overall structure; The fully sealed gas box replaces SF6 with pure air, with a highly advantageous electric field distribution design, and the partial discharge of the entire cabinet is below 5pC; The salt spray resistance test of the operating mechanism of the zinc inlay alloy surface treatment process has exceeded 168 hours, and the longest service life can reach 30000 times.
Feature：
Pure air/Nitrogen insulated ring main unit
Environmentally friendly gas
Zero carbon emissions, zero waste
Intensive and meticulous producing, Seeking finer quality
Comply with IEC/ANSI standards
Provided customized manufacture
Whole solutions for design, assembly, test...
Accountable solution for safety and reliability
Wide range offering, easy business and convenient installation
Main technical parameters (three phase)：
12kV
N |
Item |
Unit |
Data |
1 |
Rated maximum voltage |
kV |
12 |
2 |
Rated maximum current |
A |
630/1250 |
3 |
Rated frequency |
Hz |
50/60 |
4 |
Method of Arc Suppressing |
Vacuum |
|
5 |
Method of Insulation |
Pure air/Nitrogen |
|
6 |
Rated short circuit breaking current |
kA |
20/25 |
7 |
Rated peak value withstand current |
kA |
50/63 |
8 |
Rated 1min power frequency withstand voltage |
kV |
42 |
9 |
Rated lightning impulse voltage |
kV |
75 |
10 |
Operation sequence |
/ |
C-0.3-CO-180-CO |
12 |
Resistance loop |
μΩ |
≤140 |
13 |
Rated gas pressure (20℃ gauge) |
Mpa |
0.02 |
14 |
Minimum operating gas pressure |
Mpa |
0 |
15 |
Mechanical life - Circuit breaker |
N |
10000 |
Mechanical life - Load break switch |
N |
3000/6000 |
|
Mechanical life - Disconnector |
N |
3000/6000 |
|
Mechanical life - Earthing switch |
N |
3000/6000 |
|
16 |
Protection grade - Gas tank |
IP67 |
|
Protection grade - Shell |
IP4X |
||
17 |
Rated annual air leakage rate |
% |
0.01 |
24kV
N |
Item |
Unit |
Data |
1 |
Rated maximum voltage |
kV |
24 |
2 |
Rated maximum current |
A |
630/1250 |
3 |
Rated frequency |
Hz |
50/60 |
4 |
Method of Arc Suppressing |
Vacuum |
|
5 |
Method of Insulation |
Pure air/Nitrogen |
|
6 |
Rated short circuit breaking current |
kA |
20/25 |
7 |
Rated peak value withstand current |
kA |
50/63 |
8 |
Rated 1min power frequency withstand voltage |
kV |
42 |
9 |
Rated lightning impulse voltage |
kV |
75 |
10 |
Operation sequence |
/ |
C-0.3-CO-180-CO |
12 |
Resistance loop |
μΩ |
≤140 |
13 |
Rated gas pressure (20℃ gauge) |
Mpa |
0.02 |
14 |
Minimum operating gas pressure |
Mpa |
0 |
15 |
Mechanical life - Circuit breaker |
N |
10000 |
Mechanical life - Load break switch |
N |
3000/6000 |
|
Mechanical life - Disconnector |
N |
3000/6000 |
|
Mechanical life - Earthing switch |
N |
3000/6000 |
|
16 |
Protection grade - Gas tank |
IP67 |
|
Protection grade - Shell |
IP4X |
||
17 |
Rated annual air leakage rate |
% |
0.01 |
36kV
N |
Item |
Unit |
Data |
1 |
Rated maximum voltage |
kV |
36 |
2 |
Rated maximum current |
A |
630/1250 |
3 |
Rated frequency |
Hz |
50/60 |
4 |
Method of Arc Suppressing |
Vacuum |
|
5 |
Method of Insulation |
Pure air/Nitrogen |
|
6 |
Rated short circuit breaking current |
kA |
20/25 |
7 |
Rated peak value withstand current |
kA |
50/63 |
8 |
Rated 1min power frequency withstand voltage |
kV |
42 |
9 |
Rated lightning impulse voltage |
kV |
75 |
10 |
Operation sequence |
/ |
C-0.3-CO-180-CO |
12 |
Resistance loop |
μΩ |
≤140 |
13 |
Rated gas pressure (20℃ gauge) |
Mpa |
0.02 |
14 |
Minimum operating gas pressure |
Mpa |
0 |
15 |
Mechanical life - Circuit breaker |
N |
10000 |
Mechanical life - Load break switch |
N |
3000/6000 |
|
Mechanical life - Disconnector |
N |
3000/6000 |
|
Mechanical life - Earthing switch |
N |
3000/6000 |
|
16 |
Protection grade - Gas tank |
IP67 |
|
Protection grade - Shell |
IP4X |
||
17 |
Rated annual air leakage rate |
% |
0.01 |
Compact type pure air/nitrogen insulated ring main unit
Type |
Top extension of single panel |
Side extension of single panel |
Single panel size of compact module |
Circuit Breaker Panel |
390*850*1950 |
390*850*1950 |
390*850*1950 |
Load Break Switch Panel |
390*850*1950 |
390*850*1950 |
390*850*1950 |
PT Panel (with 3phase, 5 columns) |
600*850*1950 |
600*850*1950 |
600*850*1950 |
PT Panel (single phase) |
420*850*1950 |
420*850*2000 |
420*850*1600 |
Bus Riser |
375*850*1950 |
375*850*2000 |
375*850*1600 |
Metering panel |
750*850*1950 |
750*850*2000 |
750*850*1600 |
Related Products
-
35kV Maintenance-Free N2 insulated switchgear ensuring Stable Power
-
24kV Maintenance-Free zero gas switchgear
-
Maintenance-Free Environmental Protection no gas Ring Network Cabinet
-
Intelligent environmentally friendly gas insulated ring network cabinet
-
Maintenance-Free solid insulated switchgear Ensuring Stable Power
-
40.5kV Solid Insulated Switchgear/ Ring Main Unit
-
Solid insulated switchgear/Ring Main Unit
Related Knowledges
-
What are the standards for calibration of online power quality monitoring devices?Core Standards for Calibration of Online Power Quality Monitoring DevicesThe calibration of online power quality monitoring devices follows a comprehensive standard system, encompassing mandatory national standards, industry technical specifications, international guidelines, and requirements for calibration methods and equipment. The following provides a structured overview with practical recommendations for real-world applications.I. Core Domestic Standards1. DL/T 1228-2023 – Technical RequireEdwiin10/30/2025 -
110 kV Transformer Neutral Point Lightning Overvoltage: ATP Simulation & Protection SolutionsThere is extensive literature on the analysis of overvoltage at transformer neutral points under lightning surge conditions. However, due to the complexity and randomness of lightning waves, an accurate theoretical description remains elusive. In engineering practice, protective measures are typically determined based on power system codes by selecting appropriate lightning protection devices, with abundant supporting documentation available.Transmission lines or substations are susceptible to lFelix Spark10/30/2025 -
What Is Discharge Load for Energy Absorption in Power Systems?Discharge Load for Energy Absorption: A Key Technology for Power System ControlDischarge load for energy absorption is a power system operation and control technology primarily used to address surplus electrical energy caused by load fluctuations, power source faults, or other disturbances in the grid. Its implementation involves the following key steps:1. Detection and ForecastingFirst, real-time monitoring of the power system is conducted to collect operational data, including load levels andEcho10/30/2025 -
Why Monitoring Accuracy Matters in Power Quality SystemsThe Critical Role of Monitoring Accuracy in Power Quality Online DevicesThe measurement accuracy of online power quality monitoring devices is the core of the power system’s “perception capability,” directly determining the safety, economy, stability, and reliability of power supply to users. Inadequate accuracy leads to misjudgment, incorrect control, and flawed decision-making—potentially causing equipment damage, economic losses, or even grid failures. Conversely, high accuracy enables precisOliver Watts10/30/2025 -
How Does Power Dispatching Ensure Grid Stability and Efficiency?Electric Power Dispatching in Modern Power SystemsThe power system is a critical infrastructure of modern society, providing essential electrical energy for industrial, commercial, and residential use. As the core of power system operation and management, electric power dispatching aims to meet electricity demand while ensuring grid stability and economic efficiency.1. Basic Principles of Electric Power DispatchingThe fundamental principle of power dispatching is to balance supply and demand byEcho10/30/2025 -
How to Improve Harmonic Detection Accuracy in Power Systems？The Role of Harmonic Detection in Ensuring Power System Stability1. Importance of Harmonic DetectionHarmonic detection is a critical method for assessing the level of harmonic pollution in power systems, identifying harmonic sources, and predicting the potential impact of harmonics on the grid and connected equipment. With the widespread use of power electronics and the increasing number of nonlinear loads, harmonic pollution in power grids has become increasingly severe. Harmonics not only disrOliver Watts10/30/2025
Related Solutions
-
Intelligent Operation Solution for 12kV Vacuum Circuit Breakers: Integrating Real-time Monitoring & Lifetime OptimizationⅠ. Equipment Operation & MaintenanceIntelligent Monitoring System IntegrationMulti-parameter Real-time Monitoring: Embedded sensors (temperature, displacement, Hall effect current sensors) track contact temperature rise, mechanical characteristics (opening/closing speed, overtravel), coil current, and partial discharge signals. Data undergoes preprocessing via edge computing prior to cloud upload.Lifetime Prediction Model: Dynamically evaluates remaining lifespan using electrical wear dataRockwill06/10/2025 -
SF6 Circuit Breaker Solutions for Outdoor Installation (Anti-Pollution & Seismic Resistance)I.Core Challenges in Outdoor InstallationIn high-voltage transmission and distribution systems, SF6 circuit breakers are exposed to complex outdoor environments for extended periods, facing the following critical issues:Pollution & Insulation DegradationDust, salt fog, and industrial pollutants in outdoor environments easily adhere to equipment surfaces. In coastal or industrial areas, pollution levels may reach Class IV, resulting in insufficient creepage distance and triggering flashoRockwill05/12/2025 -
12kV Indoor Vacuum Circuit Breaker Southeast Asia Solution: Anti-Corrosion Compact Design12kV Indoor Vacuum Circuit Breaker Southeast Asia Solution: Anti-Corrosion Compact DesignⅠ. Executive SummarySoutheast Asia faces rapidly growing electricity demand alongside environmental challenges including high temperatures, humidity, salt spray corrosion, and grid instability. This solution recommends Solid Insulated Pole-Mounted Vacuum Circuit Breakers (VCB) featuring high reliability, compact design, and smart monitoring. Tailored for tropical climates and industrial scenarios, itRockwill06/10/2025
