Maintenance-Free Solid Insulated Ring Main Unit / Switchgear for Solar Power Plant -12kV
Key attributes
| Brand | ROCKWILL |
| Series | RSS |
| Rated current | 630A |
| Rated peak withstand current | 50(63)kA |
| Rated short-circuit breaking current | 31kA |
| Mechanical life of load switchtimes | M2 10000 times |
Description
This product integrates the R&D experience of air-insulated switchgear and gas-insulated switchgear, representing a major technological breakthrough in the medium-voltage field with high operational safety. As a core unit of the power distribution network, it adopts a vacuum interrupter for arc extinction. The high-voltage live parts are molded from solid insulating materials (epoxy resin), eliminating the need for a pressurized gas compartment and achieving full insulation, full sealing, and maintenance-free operation.
The product is equipped with an intelligent online monitoring system that monitors the status of key components inside the switchgear in real time, acquires status parameters, and automatically evaluates the possibility of faults, providing strong protection for the normal operation of the switchgear and the entire distribution line.
Product Showcase Video
Core Advantages
- Technological Breakthrough in Medium-Voltage Field: Integrates the R&D experience of air-insulated and gas-insulated switchgear, representing a major innovation in medium-voltage switchgear technology.
- High Operational Safety: Vacuum interrupter for arc extinction, solid insulating material molding, no pressurized gas compartment, eliminating the risk of gas leakage.
- Full Insulation, Full Sealing & Maintenance-Free: High-voltage live parts are fully molded in epoxy resin, achieving full insulation, full sealing, and lifelong maintenance-free operation.
- Intelligent Real-Time Monitoring: Equipped with an intelligent online monitoring system to monitor key component status in real time and automatically assess fault risks.
- Diversified Product Types: Covers load switch units, circuit breaker units, and load switch-fuse combination units to meet different distribution system requirements.
- Green & Eco-Friendly: SF6-free, type-tested, suitable for extremely harsh environments.
Product Parameters
The voltage classes of some of these eco-friendly switchgears include 6kV- 69kV. and customization is available.
|
Item |
Unit |
Parameter |
|
Rated short-time withstand current |
kA/s |
20/4(25/4) |
|
Rated peak withstand current |
kA |
50(63) |
|
Load Switch Unit |
||
|
Rated current |
A |
630 |
|
Rated short-circuit making current |
kA |
50 |
|
Rated short-time withstand current |
kA/s |
20/4 |
|
Mechanical life of load switch |
times |
M2 10000 |
|
Mechanical life of three-position disconnector |
times |
M1 3000 |
|
Electrical life of load switch |
times |
E2 100 |
|
Circuit Breaker Unit |
||
|
Rated current |
A |
630 (1250) |
|
Rated short-circuit breaking current |
kA |
20(25) |
|
Rated short-circuit making current |
kA |
50(63) |
|
Rated short-time withstand current |
kA/s |
20/4(25/4) |
|
Mechanical life of circuit breaker |
times |
M2 10000 |
|
Mechanical life of three-position disconnector |
times |
M1 3000 |
|
Electrical life of circuit breaker |
times |
E2 |
|
Rated operation sequence |
0 - 0.3s - CO - 180s - CO |
|
|
Load Switch-Fuse Combination Unit |
||
|
Rated current (maximum) |
A |
200 |
|
Rated short-circuit breaking current |
kA |
31.5 |
|
Rated short-circuit making current |
kA |
80 |
|
Rated transfer current |
A |
3150 |
Application Environment
- Ambient Temperature: -25°C to +40°C (customizable to -40°C to +50°C)
- Altitude: ≤ 1000m (higher altitudes customizable)
- Relative Humidity: Monthly average ≤90%, daily average ≤95%
- Installation Site: Indoor/outdoor (depending on model)
- Protection Degree: IP4X (indoor) / IP54 (outdoor, optional)
- Pollution Level: Class I–IV, per project requirements
- Seismic Resistance: Typically designed for 8 degrees, customizable
- Site Requirements: Free from corrosive gases, flammable/explosive substances, well-ventilated
Note: Customized designs are available for special environmental conditions.
Typical Applications
This product is a green and eco-friendly solid insulated switchgear that has undergone type testing and is suitable for various distribution systems, including extremely harsh environmental conditions:
Substations:
- User substations
- Substations and switching stations for power systems and public facilities
Industrial Field:
- Wind power stations, high-rise buildings, airports
- Open-pit coal mines, subway stations, sewage treatment plants, port facilities
- Traction power supply systems, automotive industry, petroleum industry, chemical industry
- Cement industry, thermal power plants, textile industry, paper industry
- Emergency power supply systems
Solutions for Solid Insulated Ring Main Unit
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Research and Optimization of Temperature Rise in 12kV Solid Insulated Ring Main UnitsThe solid insulated ring main unit (RMU) is a novel distribution equipment that integrates external solid encapsulation, insulated busbar, and compact combined unit technology. Its switches and high-voltage live components are entirely embedded in epoxy resin, which serves as the primary insulation between live parts and ground, and between phases. As an environmentally friendly alternative to SF₆ gas-insulated equipment, the 12kV solid insulated RMU offers advantages but inherently suffers from -
Investing Wisely: The Compelling Life Cycle Cost of Solid Insulated Switchgear"Economy" remains paramount in power equipment procurement decisions. When it comes to Solid Insulated Ring Main Units (SIRMUs), the seemingly higher initial price often causes concern. However, a deeper analysis of their Life Cycle Cost (LCC) reveals a surprisingly compelling economic picture – it emerges as the wiser and ultimately more cost-effective choice.Initial Investment: A Misunderstood Starting PointAdmittedly, the purchase price of a SIRMU can be about 5%-15% higher than tra -
Research on Partial Discharge Detection Technology for Solid-Insulated Ring Main UnitsWith the development of urban power grids, the number of solid-insulated ring main unit (RMU) installations has continuously increased. Their operational status significantly impacts the power supply reliability of the electrical system. The consequences of failures are severe: direct damage includes damage to the protected lines and equipment, as well as power loss; indirect consequences cause widespread customer outages, disrupting daily life, production, and even social stability.Currently, t
Documentation Resource Library Solid Insulated Ring Main Unit
FAQ for Solid Insulated Ring Main Unit
Yes. We can dispatch experienced engineers for on-site installation guidance, commissioning, and operator training. Remote technical support is also available 24/7.
It monitors the status of key components inside the switchgear in real time, including temperature, humidity, partial discharge, and switch position. It automatically evaluates the possibility of faults and provides early warnings to ensure safe operation of the distribution line.
Yes. High-voltage live parts are fully molded in epoxy resin, achieving full insulation, full sealing, and no pressurized gas compartment, ensuring lifelong maintenance-free operation. The design life is typically over 30 years.
