SF6 Gas Insulated RMU

Junray Electrical strictly adheres to national standards for the production of SF6 Gas-Insulated Ring Main Units (RMUs). Each SF6 Gas Insulated RMU undergoes rigorous sealing, withstand voltage, and interlocking tests to ensure stable and safe operation. We offer comprehensive customization options—including unit configurations and specific functionalities—allowing us to design and manufacture bespoke gas-insulated switchgear tailored to your specific power distribution scheme, ensuring a perfect fit for even the most demanding and harsh operating environments.

Product Advantages

Fully Sealed, Gas-Insulated: Ultra-High Protection: All high-voltage components are hermetically sealed within an SF6 gas compartment, This effectively blocks dust, moisture, and salt mist, ensuring stable operation even in environments characterized by high humidity, heavy dust, or coastal salt spray.

Maintenance-Free: No Routine Servicing Required: Thanks to its fully sealed structure, the unit requires no frequent servicing or routine maintenance—unlike standard ring main units (RMUs) that demand periodic inspections. This results in significant savings on maintenance costs, making it ideally suited for remote locations or environments where maintenance access is difficult.

Adapted for Harsh Environments: Perfectly suited for severe operating conditions involving high humidity, heavy dust, and coastal salt spray—environments where standard RMUs would fail to function. With this gas-insulated solution, you no longer need to worry about the challenges posed by harsh environmental factors.

High Reliability, Low Failure Rate: The fully sealed design ensures exceptionally stable operation and a significantly lower failure rate—specifically, 50% lower than that of standard RMUs. This makes SF6 Gas Insulated RMU the ideal choice for applications and scenarios where high reliability is a critical requirement.

Product Parameter

Product Details

1. Fully Sealed SF6 Gas Tank: A completely sealed SF6 gas tank encloses all high-voltage components, providing an exceptionally high level of protection.

2. Maintenance-Free Design: The maintenance-free design eliminates the need for frequent inspections and repairs, thereby reducing maintenance costs.

3. "Five-Prevention" Interlock Protection: Features mechanical interlocking mechanisms to prevent operational errors, ensuring safety and reliability.

4. Ultra-Compact Cabinet: Boasting a smaller physical footprint, the compact cabinet design is ideally suited for installation in small-scale power distribution rooms.

Product Application

Suitable applications for SF6 Gas Insulated RMU include:

Coastal Regions: Power distribution in coastal areas, offering protection against salt mist.

High-Humidity Regions: Power distribution in areas characterized by high humidity levels.

High-Dust Regions: Power distribution in environments with high concentrations of dust.

Mining Areas: Power distribution within mining sites, where dust levels are typically high.

Remote Areas: Power distribution in remote locations where maintenance access is difficult or inconvenient.

Nairobi Municipal Street Lighting Project, Kenya

Project Overview

·Project Name: Nairobi Municipal Street Lighting Retrofit Project

·Location: Nairobi, Kenya

·Completion Date: March 2026

·Project Scope: Power distribution for street lighting via 50 outdoor Ring Main Units (RMUs) across the city

Products Used

·Product Model: SF6-insulated Ring Main Unit (12kV)

·Quantity: 50 units

·Configuration: C+C (two-unit) RMU; 630A, 20kA

·Certification: CE certified

·Special Requirements: Outdoor installation, maintenance-free, easy operation, and resilience against African grid fluctuations

Solution

The street lighting project spans various locations across Nairobi. As the units are installed outdoors and operate unmanned, maintenance is challenging; therefore, the equipment requires high reliability and a maintenance-free design. We offer an SF6 gas-insulated switchgear solution:

1. Maintenance-free outdoor design

·IP67 protection rating; suitable for direct outdoor installation without the need for a dedicated substation room

·Fully sealed structure; impervious to rain, dust, and small animals

·Maintenance-free design; capable of operating for over 20 years on a single gas charge

·Significantly reduces municipal maintenance costs

2. High-reliability design

·SF6 gas insulation ensures stable performance and a low failure rate

·Designed to withstand the significant voltage fluctuations common in African power grids

·Comprehensive protection functions ensure rapid fault isolation

·Long mechanical lifespan and reliable operation

3. Simple operation, locally adapted

·Simple, reliable operating mechanism that is easy for local electricians to master

·Includes English operation manuals and simplified maintenance guides

·Video training tutorials provided for local O&M personnel

·Commonly replaced parts included with the shipment for convenient on-site replacement

Customer Feedback

"We deployed 50 outdoor street-lighting distribution switchgear units across Nairobi, and maintenance had always been a major challenge. Junray’s SF6 Ring Main Units (RMUs) perfectly solved this problem; they are maintenance-free and highly reliable in operation. The units have been in service for two months with zero faults. Their ease of operation is also ideal for our local technicians. The product quality is excellent, the price is reasonable, and the service is outstanding. We will continue to purchase them in the next phase."

— Project Supervisor, Kenyan Municipal Power Authority