SF6 gas-insulated switchgear for Industrial Power Distribution-40.5kV
Key attributes
| Brand | ROCKWILL |
| Model NO. | SF6 gas-insulated switchgear for Industrial Power Distribution-40.5kV |
| Rated voltage | 40.5kV |
| Rated frequency | 50/60Hz |
| Series | RMR |
Description
The RMR-40.5 series SF6 gas-insulated switchgear is a new-generation compact product designed and manufactured by Rockwill in compliance with IEC 62271-200. It offers a wide range of configurations and flexible modular extension, meeting not only general power distribution requirements but also the demands for flexible and compact switchgear applications in secondary distribution networks.
It is widely deployed in public power grids, rail transit, new energy projects (e.g., solar farms, wind farms), data centers, and E-house solutions.
Product Showcase Video
Product Advantages
-
Complete Mechanical Interlocking: A reliable interlock design ensures operator safety. The cable compartment door can be opened without any special tools.
-
Ergonomic Operation: The operating handle is positioned at 1.4m (approx. 4ft) above ground, providing a comfortable and natural reach for operators. Combined with reliable mechanical interlocks, it ensures convenient and safe operation.
-
Compact Structure:The compact design optimizes internal space utilization. With cabinet widths of 420mm and 500mm, it ranks among the industry's most space-efficient solutions.
-
Flexible Extension: The modular design enables a plug-and-play assembly of each component, allowing convenient and flexible on-site expansion.
-
Virtually Maintenance-Free:All live parts are fully sealed inside the gas tank, protected from environmental influences, and require no maintenance throughout the designed service life under normal operating conditions.
-
Adaptable to Harsh Environments:The completely sealed insulation structure delivers exceptional resistance to environmental impacts, making it suitable for challenging conditions including high altitude, heavy pollution, and high salt spray.
Parameters
|
Item |
Unit |
Value |
||
|
Load switch unit (C) Circuit breaker unit (V） |
Load switch unit (C) Circuit breaker unit (V） |
|||
|
Rated voltage (IEC/GB) |
kV |
36 / 40.5 |
||
|
Rated frequency |
Hz |
50 (60) |
||
|
Rated normal current |
A |
630(x1.1) |
630/1250(x1.1) |
|
|
Rated short-duration power frequency voltage (1min) |
To earth & between phases (IEC/GB) |
kV |
70 / 95 |
|
|
Across the isolating distance (IEC/GB) |
80 / 118 |
|||
|
Rated lightning impulse voltage |
To earth & between phases (IEC/GB) |
kV |
170 / 185 |
|
|
Across the isolating distance (IEC/GB) |
195 / 215 |
|||
|
Rated power frequency voltage of control and auxiliary circuits (1min) |
kV |
2 |
||
|
Rated short-time withstand current & duration |
kA |
25/4 (20/4) |
||
|
Rated peak withstand current |
kA/s |
63 (52) |
||
|
Rated short-circuit breaking current |
kA |
- |
25 (20) |
|
|
Rated short-circuit making current |
kA |
63 (52) |
||
|
Mechanical endurance |
Circuit breaker |
- |
- |
10000 |
|
Load switch / Disconnector |
5000 |
|||
|
Earthing switch |
3000 |
|||
|
Rated functional pressure for insulation and interruption (relative at 20°C) |
Mpa |
0.04 |
||
|
Minimum functional pressure for insulation and interruption (relative at 20°C) |
Mpa |
0.02 |
||
|
Gas leakage rate |
/year |
≤0.01% |
||
|
Degree of protection |
Gas tank |
- |
IP67 |
|
|
Enclosure / Mechanism compartment |
- |
IP4X, IK10 |
||
|
Internal arc classification AFLR |
kA/s |
16/1, 20/1, 25/1 |
||
|
Altitude |
m |
≤1000 |
||
|
Dimension (Width x Depth x Height) |
mm |
420 x 1000 x 1650 500 / 550 x 1000 x 1650 |
420 x 1000 x 1650 500 / 550 x 1000 x 1650 |
|
Schematic Diagram of 40.5 kV SF6 Gas-Insulated Switchgear
Normal Service Conditions
| Ambient air temperature — upper limit | +40 °C |
| Ambient air temperature — 24 h average | +35 °C |
| Ambient air temperature — lower limit | –25 °C |
| Altitude above sea level | ≤ 1 000 m |
| Relative humidity — 24 h average | ≤ 95% (at +40 °C) |
| Relative humidity — monthly average | ≤ 90% |
| Water vapour pressure — 24 h average | ≤ 2.2 kPa |
| Water vapour pressure — monthly average | ≤ 1.8 kPa |
| Solar radiation | ≤ 1 000 W/m² |
| Wind speed (outdoor) | ≤ 34 m/s (mild) |
| Pollution degree (indoor) | Class II |
| SF₆ gas decomposition products | ≤ 1 μL/L (SO₂F₂) |
Solutions for RMU
-
Intelligent Maintenance Services and Sustainable Solutions for 12kV Medium Voltage SwitchgearⅠ. Key Points for Medium Voltage Switchgear System Architecture Upgrade Integration of Eco-Friendly Insulation Technology (for Medium Voltage Switchgear) SF₆-Free Solutions: Adoption of dry air or AirPlus® blended gas to replace traditional SF₆ (GWP <1) in Medium Voltage Switchgear, supporting eco-gas switching throughout the equipment lifecycle (e.g., ABB PrimeGear ZX0 Switchgear). Compact Design: Modular structure reduces footprint by 25%, ideal for space-sensitive applications like comm -
Medium Voltage Switchgear Solutions for Southeast Asia: Intelligent Power Infrastructure Adapting to Complex EnvironmentsSoutheast Asia’s power market is undergoing rapid development, driven by grid modernization and renewable energy integration. Medium Voltage (MV) switchgear—with its high reliability, extended lifespan, and adaptability to harsh conditions—has emerged as the optimal solution for modernizing regional power systems.This comprehensive strategy addresses the unique demands of key Southeast Asian markets across four dimensions: product design, certification, localized production, and business models,
Reference Projects for RMU
-
South Africa Mining Site KYN28 Switchgear Distribution Upgrade Equipment Selection and Engineering Practice in a High-Dust and Heavy Impact Load Environment1. Project Overview and Application ChallengesGeographic environment: The project is located in a typical industrial mining environment in South Africa. The local grid infrastructure is relatively aged, and the site is characterized by heavy dust and large diurnal temperature variations, placing stringent demands on the ingress protection and insulation performance of electrical equipment.Application conditions and load characteristics: As the core power center of the site, this facility carries
Documentation Resource Library RMU
FAQ for RMU
Yes. The modular plug-and-play design enables on-site expansion by simply assembling individual components. No vacuum pumping, gas filling, or leakage detection is required during field extension, significantly reducing commissioning time.
Yes. All live parts are fully sealed inside the gas tank, protected from environmental influences and requiring no maintenance throughout the designed service life under normal operating conditions. The hermetically sealed SF₆ insulation eliminates gas replenishment and internal inspection needs.
Yes. The RMR-40.5 series is designed and manufactured in compliance with IEC 62271-200. It also meets the requirements of IEC 62271-1 and IEC 62271-100, ensuring full international compliance for medium-voltage switchgear applications.
