XGN15-12 Gas-Insulated Ring Main Switchgear

In many residential areas, small factories, and small substations, the space for the distribution rooms is extremely limited. Ordinary ring network cabinets are too large in size and their installation will also squeeze the space for other equipment, making it impossible to install properly. Moreover, the Extractable Ring Main Unit is expensive and has extremely low cost performance for small ring network distribution scenarios, resulting in cost waste. The XGN15-12 Gas-Insulated Ring Main Switchgear is specifically designed for this ultra-small 10kV ring network distribution scenario. With its ultra-crowded design, reliable performance, and affordable price, it precisely solves the core pain points of "not enough space and high cost", enabling ultra-small distribution rooms to achieve stable and safe ring network distribution.

Technical Specifications

Product Core Advantages

The XGN15-12 Gas-Insulated Ring Main Switchgear combines compactness, reliability and economy, each aspect effectively addressing practical problems.

Equipped with SF6 load switches, it operates more stably and reliably: The core uses SF6 load switches, with SF6 gas serving as the insulation and arc-extinguishing medium. The arc-extinguishing capability exceeds that of ordinary vacuum switches, and the insulation performance is excellent. During operation, the failure rate is extremely low, requiring no frequent maintenance. It perfectly suits the 10kV ring network distribution scenario and also features a 20-year maintenance-free characteristic, significantly reducing the later maintenance costs and making it easier for purchasers to use.

Ultra-compact design, reducing footprint by 30%: Adopting a box-type fixed ring network structure, the design has been optimized to make the cabinet as compact as possible. The volume is 30% smaller than that of the ordinary XGN66 ring network cabinet. The structure is compact without sacrificing performance. Even in a space-constrained ultra-small distribution room, it can be easily placed without the need for a modification of the distribution room, significantly saving floor space and solving the core problem of "not having enough space" for ordinary ring network cabinets.

Ring network-specific structure, stable power supply without interruption: Using a professional ring network structure, it perfectly fits the 10kV ring network distribution system. It can achieve bidirectional power supply. When one circuit fails, it can automatically switch to another circuit, effectively avoiding power outages and ensuring normal power supply in scenarios such as residential areas and small factories. It is particularly suitable for small-scale scenarios with basic requirements for power continuity.

High cost-effectiveness choice, cost directly reduced by 50%: Compared to the KYN28 switch cabinet， the price is directly reduced by 50%. It eliminates redundant functions and focuses on the core requirements of small ring network distribution. Without spending a large amount of money on complex equipment， it can obtain a stable and reliable ring network distribution solution at a lower cost， significantly reducing the procurement budget and improving the project cost-effectiveness.

Professional quality guarantee

Junray Electrical, as a professional Manufacturer, Supplier and Factory in China, has been deeply engaged in the research and production of distribution equipment for many years. It strictly follows international and domestic standards such as IEC 62271-200 and GB/T 3906. Each XGN15-12 Gas-Insulated Ring Main Switchgear has undergone strict voltage endurance and insulation tests, ensuring high quality. We adopt standardized unit design, and the cabinet is precisely manufactured from high-quality steel plates. It has high mechanical strength, with a protection level of IP3X, which can effectively prevent dust from entering and protect the internal high-voltage components. It is equipped with mechanical five-prevention interlock devices to prevent misoperation and ensure the safety of maintenance personnel. The internal use of prefabricated silicone rubber insulated cable terminals makes installation convenient, and during maintenance, they can be quickly disassembled and restored, further adapting to the usage requirements of small-scale scenarios.

Universal Scene Adaptation

The XGN15-12 Gas-Insulated Ring Main Switchgear is widely compatible with various ultra-small 10kV ring network distribution scenarios, precisely matching the power demands of different scenarios without the need for additional modifications and can be directly put into use.

For residential area distribution scenarios, it is compatible with the ultra-small distribution rooms in residential areas for 10kV ring network distribution, with small size and no occupation, ensuring stable electricity supply for residents;

For small factories, it is compatible with 10kV ring network distribution for small factories, with stable loads and low failure rates, meeting the power demands of the factory for production, while saving the space of the distribution room;

For small substations, it is compatible with the ultra-small power supply requirements of small 10kV substations, with stable ring network power supply and reduced operation and maintenance costs;

For small infrastructure project scenarios, it is compatible with 10kV ring network distribution for small infrastructure projects, with convenient installation, durable and long-lasting, ensuring the smooth progress of infrastructure projects.

Regarding us

Junray Electrical has a complete R&D, production and quality inspection system. The core components are selected from high-quality brands. Each XGN15-12 Gas-Insulated Ring Main Switchgear undergoes strict testing before leaving the factory, ensuring that the performance meets the standards and can smoothly pass the project acceptance. This product is specially customized for ultra-small scenarios, with a smaller size and higher cost-effectiveness. It is more suitable for ultra-small distribution rooms compared to similar products. We provide comprehensive pre-sale selection guidance and after-sales maintenance services. We can offer personalized adaptation suggestions based on the actual needs of the customer's scenario, and also provide professional installation and commissioning guidance, making the purchase process more worry-free and the use more reassuring, and helping customers reduce costs and improve distribution efficiency.

Immediate Purchase

For the ultra-small 10kV ring network distribution scenarios, choosing the right equipment not only solves the problem of "not having enough space", but also saves costs and ensures stable power supply. Choosing Junray Electrical guarantees quality, offers more affordable prices, and provides more precise compatibility, perfectly addressing the pain points of ordinary ring network cabinets being large in size and having high costs. Don't hesitate. Contact us immediately to secure this top choice for ultra-small ring network power distribution equipment. This will enable a stable, safe and efficient ring network power supply in an ultra-small power room, significantly reducing procurement and operation costs!

Commercial Project in Dhaka, Bangladesh

Project Overview

·Project Name: Power Distribution Project for a Commercial Center in Dhaka

·Location: Dhaka, Bangladesh

·Completion Date: February 2026

·Project Scale: 10kV distribution substation for a commercial center; total capacity of 8000kVA

Products Used

·Model: XGN15-12 Ring Main Unit (RMU)

·Quantity: 12 units

·Configuration: High-quality domestic components; CE certified

·Certification: CE certified

·Special Requirements: Suitable for high-temperature, high-humidity environments; corrosion-resistant

Solution

Dhaka, Bangladesh, experiences a tropical climate characterized by high temperatures and humidity, and the client had a limited budget. We provided a customized XGN15-12 solution:

1. Adaptation to Tropical Environments

·Enclosures feature a corrosion-resistant powder-coated finish with a dual-layer coating system to withstand high heat and humidity.

·All internal metal components are galvanized to prevent rust and corrosion.

·Equipped with anti-condensation heaters and temperature-controlled fans to prevent condensation in the humid environment.

·All components are wide-temperature rated to ensure reliable operation in high-heat conditions.

2. Cost-Effective Solution

·Utilizes high-quality domestic brand components, offering reliable performance at a competitive price.

·Priced more than 60% lower than European brands, significantly reducing project costs.

·CE certified, meeting international standards and ensuring quality.

·Features mature technology with a proven track record of global application.

3. Service Support

·Comprehensive technical documentation provided in English.

·Remote technical support and commissioning guidance available.

·English-language operation training provided.

·Common spare parts included with the shipment for convenient on-site replacement.

Customer Feedback

"The climate in Dhaka is very hot and humid, so we were worried about the switchgear's durability. Junray's XGN15-12 RMUs have been running for 3 months now, and they are performing perfectly — no overheating, no corrosion issues. The price is also very competitive, much lower than European brands but with CE certification and good quality. Their remote technical support is also very helpful. We are very satisfied." 

— Electrical Engineer, Bangladesh Commercial Real Estate Company

Renovation Project Overview

This project involves the construction of a new 10kV power distribution system for an urban redevelopment project comprising high-rise residential buildings, street-level commercial units, an underground garage, and supporting public facilities; it serves a high-density urban residential load. The area was previously supplied by aging overhead lines in a single-source radial configuration, resulting in poor reliability, high failure rates, and a lack of fault-switching capabilities—falling short of modern residential power supply standards.

The project entails constructing a new, standalone high-voltage distribution substation utilizing XGN15-12 fixed-type SF6 ring main units (RMUs). This establishes a "hand-in-hand" (loop) power supply structure, enabling dual-source backup, sectional isolation, load distribution, and terminal protection, thereby meeting the requirements for high reliability, maintenance-free operation, and compact equipment design.

Issues Prior to Renovation

Low supply reliability: Single-source supply via aging lines meant that any line fault or maintenance required a total area blackout, leading to frequent resident complaints.

Aging equipment and safety hazards: Legacy switchgear suffered from insulation degradation and poor arc-extinguishing capabilities, making it prone to tripping and dielectric breakdown during thunderstorms.

Lack of loop backup capability: Absence of power source switching functions meant the system could not meet acceptance standards for dual-source supply in new residential developments.

Large footprint and complex O&M: Traditional fixed high-voltage cabinets were bulky and complex, resulting in high civil engineering costs and a heavy daily maintenance workload.

Imprecise protection: Lack of dedicated fuse-load switch combination units prevented rapid isolation of transformer short-circuit or overload faults.

Equipment Configuration Plan

In accordance with residential distribution network design standards and construction regulations, the high-voltage substation is equipped with XGN15-12 10kV SF6 RMUs. A standard "two-in, four-out" loop network configuration is adopted to facilitate dual-source loop supply, sectional tie-switching, and transformer terminal protection. Key Equipment Specifications

Model: XGN15-12 Indoor AC High-Voltage SF6 Ring Main Unit (RMU)

Rated Voltage: 12kV (compatible with 10kV distribution networks)

Rated Current: 630A

Short-circuit Breaking: Load-break switch + fuse combination unit; enables rapid clearing of transformer short-circuit faults

Core Structure: SF6 three-position load-break switch (Close, Open, Ground); stable insulation performance

Cabinet Features: Compact structure, small footprint, maintenance-free, excellent sealing performance

Operation Mode: Manual and electric options; equipped with live-line indication, fault indication, and "Five-Prevention" interlocking

Application Modes: Ring main power supply, terminal power supply, dual-source backup power supply

Construction & Application Highlights

Compact size saves civil engineering costs: Smaller volume and more compact layout compared to KYN28 metal-clad switchgear; suitable for small distribution rooms in residential complexes, significantly reducing civil infrastructure investment.

Stable and reliable SF6 insulation: Fully sealed gas-insulated design; unaffected by external dust, humidity, or condensation; suitable for basements and enclosed distribution rooms.

High fault tolerance for ring main supply: "Hand-in-hand" ring circuit configuration; allows isolation of any faulty line section while the other section maintains power, enabling switchover without service interruption.

Targeted protection combination: Load-break switch + current-limiting fuse combination; specifically designed for protecting box-type substations and residential distribution transformers; ensures rapid fault clearing and precise operation.

Comprehensive "Five-Prevention" safety features: Mechanical interlocking prevents accidents such as closing under load, grounding while live, or unauthorized entry into compartments.

Operational Performance

Significantly improved power supply reliability: Dual-source ring main backup enables line maintenance and single-point fault isolation without large-scale outages; regional power supply reliability meets State Grid acceptance standards.

Stable, zero-fault operation: Fully insulated SF6 gas structure eliminates failures caused by creepage, flashover, or moisture; no tripping incidents or insulation anomalies throughout the year.

Rapid and precise fault clearing: Instantaneous clearing of distribution transformer short-circuits and overloads; effectively protects downstream transformers and low-voltage equipment. Significantly reduced O&M burden: The equipment features a maintenance-free design, eliminating the need for frequent inspections or gas replenishment, making it ideal for long-term unattended operation in residential distribution substations.

Successful completion and acceptance: Fully complies with design standards for urban residential power distribution, as well as requirements for ring-main power supply and dual-power automatic transfer.

Case Summary

The XGN15-12 ring main unit (RMU) is the most widely adopted, cost-effective high-voltage switchgear for residential, commercial, and municipal renovation projects, as well as for integration with box-type substations and urban distribution networks. Compared to metal-clad withdrawable switchgear (KYN series), it offers advantages such as lower costs, a compact footprint, maintenance-free operation, and suitability for ring-main network configurations. It is highly suitable for 10kV terminal distribution, ring-main sectionalizing, and power distribution projects in residential and commercial areas, making it the preferred choice for standardized urban distribution network construction.