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End-to-End Power Project Solutions for the Global Energy Market

IEE Business provides end-to-end power project solutions for the global market — from financing and procurement to engineering, construction, and commissioning. We support utilities, developers, and industries with integrated services across renewable, thermal, and grid infrastructure projects, ensuring efficiency, compliance, and timely delivery worldwide.

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Engineering

Research on Partial Discharge Detection Technology for Solid-Insulated Ring Main Units
With 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
Rockwill
18yrs 500-1000 employees 108000m²+m² US$150,000,000+ China
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08/15/2025
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Engineering

Research and Optimization of Temperature Rise in 12kV Solid Insulated Ring Main Units
The 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
Rockwill
18yrs 500-1000 employees 108000m²+m² US$150,000,000+ China
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08/15/2025
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Engineering

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
Rockwill
18yrs 500-1000 employees 108000m²+m² US$150,000,000+ China
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08/15/2025
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Engineering

Application of Intelligent Solid Insulated Ring Main Units (SIRMUs) in the Qinzhou Distribution Network
1 IntroductionCoastal regions face environmental challenges including heavy rainfall, lightning, high temperatures, high humidity, and high salt spray corrosion. To ensure the safety of urban distribution grids in such environments, minimize power outages caused by equipment maintenance, and prevent accidents due to equipment end-of-life and other factors affecting grid security, we have researched the use of a new type of Solid Insulated Ring Main Unit (SIRMU). This SIRMU offers long lifespan,
Rockwill
18yrs 500-1000 employees 108000m²+m² US$150,000,000+ China
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08/15/2025
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Engineering

Comparison of SF6 Gas-Insulated Ring Main Units and Solid-Insulated Ring Main Units
IntroductionCurrently, SF6 gas-insulated ring main units (hereinafter referred to as "SF6 RMUs") dominate the market. However, SF6 gas is internationally recognized as one of the primary greenhouse gases. To achieve environmental protection and emissions reduction, its use must be reduced and restricted. The emergence of solid-insulated ring main units (RMUs) has addressed the issues associated with SF6 RMUs while incorporating numerous new features.1 Ring Mains Power Supply and Ring Main Units
Rockwill
18yrs 500-1000 employees 108000m²+m² US$150,000,000+ China
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08/15/2025
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Engineering

Current Status and Improvement Measures for SF₆ Ring Main Units
1 Current Status of SF₆ Ring Main Units​1.1 Structure of Ring Main Units​Ring main units (RMUs) consist of a gas chamber, operating mechanism compartment, cable compartment, and busbar connection compartment (present in some units).The gas chamber is positioned at the rear or in locations less prone to harm personnel during internal arcing. The operating mechanism, cable, and busbar connection compartments are at the front, facilitating switch operation, cable installation, and space-efficient w
Rockwill
18yrs 500-1000 employees 108000m²+m² US$150,000,000+ China
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08/13/2025
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Engineering

SF₆ Ring Main Units (RMUs) and Urban Grid Renovation
Overview​Older distribution networks are primarily radial in structure, with most incoming and outgoing lines being overhead lines. The switching equipment typically consists of air-insulated vacuum circuit breakers or minimal-oil circuit breakers. These networks suffer from frequent faults, high operating costs, and prolonged, widespread power outages in the event of a failure, significantly hindering economic development.With rapid economic growth and the implementation of urban grid renovatio
Rockwill
18yrs 500-1000 employees 108000m²+m² US$150,000,000+ China
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08/13/2025
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Engineering

Issues and Countermeasures for 10kV SF₆ Gas-Insulated Common Tank Ring Main Unit (European-Style) Cable Connections
Issues and Countermeasures for 10kV SF₆ Gas-Insulated Common Tank Ring Main Unit (European-Style) Cable Connections​With the extensive use of cable lines in urban distribution networks, 10kV SF₆ gas-insulated common tank Ring Main Units (RMUs) (European-style) are widely adopted as network nodes due to their characteristics of full insulation, complete enclosure, maintenance-free operation, compact size, and flexible installation. These European-style SF₆ common tank RMUs are suitable for coasta
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18yrs 500-1000 employees 108000m²+m² US$150,000,000+ China
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08/13/2025
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Engineering

10kV SF₆ Ring Main Units (RMUs) Common Fault Prevention Measures
10kV SF₆ Ring Main Units (RMUs) Common Fault Prevention Measures​During the development of urban distribution network cabling, 10kV SF₆ Ring Main Units (RMUs) (European-style), serving as ring power supply nodes, have been widely adopted due to their features such as full insulation, complete enclosure, maintenance-free operation, compact size, and flexible, convenient installation. However, as the number of RMUs in use increases, the occurrence of faults within RMUs has also gradually risen.​1
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18yrs 500-1000 employees 108000m²+m² US$150,000,000+ China
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08/13/2025
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Engineering

Analysis of Two 10kV SF₆ Ring Main Unit Failures and Live Testing
Analysis of Two 10kV SF₆ Ring Main Unit Failures and Live Testing​​1 Introduction to 10kV SF₆ Ring Main Units​A 10kV SF₆ ring main unit (RMU) typically consists of a gas tank, an operating mechanism compartment, and a cable connection compartment.​Gas Tank: The most critical component, housing the load switch busbar, switch shaft, and SF₆ gas. The load switch is a three-position switch, including an isolating blade and an arc-extinguishing shield.​Operating Mechanism Compartment: The operating m
Rockwill
18yrs 500-1000 employees 108000m²+m² US$150,000,000+ China
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08/13/2025
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