Electrical Engineering Guides

RGIS

ROCKWILL RGIS Three-Position Disconnector and Interlock Design: How the "Five-Prevention System" Is Achieved in MV Switchgear — A Detailed Analysis

In power systems, the safe operation of high-voltage switchgear is critical. The ROCKWILL RGIS C-GIS switchgear converts complex international standards (IEC, IEEE, etc.) into reliable physical protection through precise mechanical interlock design, providing a solid safety guarantee for the equipme

By Rockwill 06/17, 2026
Switchgear

Rockwill RGIS Switchgear — Gas Selection Considerations for 12 kV, 24 kV, and 40.5 kV Applications

Rockwill RGIS uses differentiated insulation gases across voltage classes (N2/dry air for 12/24 kV, SF6 for 40.5 kV, with g3being introduced as an eco-friendly alternative). This selection is fundamentally an engineering decision that balances insulation performance, equipment compactness, cost-effe

By Rockwill 06/13, 2026
High Voltage Switchgear

How has g3 technology changed the global climate?

The Alternative to SF6 for High Voltage Applications Removing Greenhouse Gases from the Grid Nineteen of the warmest years on record have occurred since 2000, where greenhouse gases (GHGs) are at the root cause of climate change. Sulfur hexafluoride (SF₆), an insulating gas used in high-voltage swit

By Rockwill 05/09, 2026
HV Disconnector Accessory

Difference Between Maintenance Earthing Switches and Fast Earthing Switches？

Maintenance earthing switches and fast earthing switches (FES) are two types of switches with distinct characteristics. Maintenance Earthing Switches These are typically configured alongside the disconnectors on both sides of a circuit breaker. Their sole purpose is to provide safety grounding on bo

By Rockwill 05/08, 2026
North American Switchgear

High Current Switchgear Design IEEE C37.20.2 Tulip Contacts

To meet the specific requirements of the IEEE C37.20.2 standard for metal-clad switchgear in North America particularly regarding installation layout and structural configurations designs based on conventional IEC/GB standards require targeted modifications. These adaptations are essential to preven

By Rockwill 04/25, 2026
News

Rockwill Powers Cambodia’s Battambang Solar-Storage Project

The Battambang Conch PV + Energy Storage Power Station in Cambodia has successfully completed its grid-connected trial operation. The project utilized medium-voltage switchgear supplied by Rockwill Intelligent Electric Co., Ltd. Despite numerous challenges—including an extremely tight delivery sched

By Baker 12/24, 2025
HV Switchgear

Comparative Analysis of High-Voltage Load Switch Technologies

A load switch is a type of switching device positioned between circuit breakers and disconnectors. It features a simple arc extinguishing device capable of interrupting rated load current and certain overload currents, but cannot interrupt short-circuit currents. Load switches can be classified into

By Echo 12/15, 2025
HV Switchgear

Analysis of Faults and Solutions for 17.5kV Ring Main Units in Distribution Networks

With the improvement of social productivity and people's quality of life, the demand for electricity is continuously increasing. To ensure the effectiveness of power grid system configuration, it is necessary to reasonably construct distribution networks based on actual conditions. However, during t

By Felix Spark 12/11, 2025
HV Switchgear

How to install a DTU on an N2 Insulation ring main unit?

DTU (Distribution Terminal Unit), a substation terminal in distribution automation systems, is secondary equipment installed in switching stations, distribution rooms, N2 Insulation ring main units (RMUs), and box-type substations. It bridges primary equipment and the distribution automation master

By James 12/11, 2025
HV Switchgear

Design of a New 12kV Environmentally Friendly Gas-Insulated Ring Main Unit

1. Specific Design 1.1 Design Concept State Grid Corporation of China actively promotes grid energy conservation and low-carbon development to achieve national carbon peak (2030) and neutrality (2060) goals. Environmentally friendly gas-insulated ring main units represent this trend. A new 12kV inte

By Dyson 12/11, 2025
HV Switchgear

Integrated Intelligent Ring Main Units in 10kV Distribution Automation

In the rational application of intelligent technologies, the integrated intelligent ring main unit in 10kV distribution automation construction is more conducive to improving the construction level of 10kV distribution automation and ensuring the stability of 10kV distribution automation constructio

By Echo 12/10, 2025
HV Switchgear

35kV RMU Busbar Failure Due to Installation Errors Analysis

This article introduces a case of 35kV ring main unit busbar insulation breakdown failure, analyzes the failure causes and proposes solutions [3], providing reference for the construction and operation of new energy power stations. 1 Accident Overview On March 17, 2023, a photovoltaic desertificatio

By Felix Spark 12/10, 2025

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ROCKWILL RGIS Three-Position Disconnector and Interlock Design: How the "Five-Prevention System" Is Achieved in MV Switchgear — A Detailed Analysis

Rockwill RGIS Switchgear — Gas Selection Considerations for 12 kV, 24 kV, and 40.5 kV Applications

How has g3 technology changed the global climate?

Difference Between Maintenance Earthing Switches and Fast Earthing Switches？

High Current Switchgear Design IEEE C37.20.2 Tulip Contacts

Rockwill Powers Cambodia’s Battambang Solar-Storage Project

Comparative Analysis of High-Voltage Load Switch Technologies

Analysis of Faults and Solutions for 17.5kV Ring Main Units in Distribution Networks

How to install a DTU on an N2 Insulation ring main unit?

Design of a New 12kV Environmentally Friendly Gas-Insulated Ring Main Unit

Integrated Intelligent Ring Main Units in 10kV Distribution Automation

35kV RMU Busbar Failure Due to Installation Errors Analysis

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