XGN-12 environmentally friendly Ring Main Unit

XGN-12 Eco-Friendly Gas-Insulated Ring Main Unit uses dry air or nitrogen insulation instead of SF₆, helping reduce greenhouse gas emissions and improve recyclability. With vacuum interruption technology, it offers compact size, safe operation, low maintenance, and strong environmental adaptability.

It is suitable for 3–11 kV, three-phase AC 50/60 Hz single-busbar systems, and is widely used in residential distribution, substations, industrial plants, commercial buildings, airports, subways, hospitals, railways, and other power distribution projects.

XGN-12 environmentally friendly Ring Main Unit

Key Features:

Integrated and Multifunctional Design: The switchgear features a 2.5mm thick stainless steel enclosure with IP67 protection, ensuring durability and reliability.

Eco-Friendly and Non-Polluting: It uses dry air or nitrogen as the insulating gas, making it environmentally friendly with no harmful emissions.

Flexible and Expandable: Modular design allows for customized solutions to meet diverse distribution needs.

Safe and Easy to Operate: The panel includes comprehensive mechanical interlocking, ensuring safe and efficient operation.

Product Advantages

Eco-Friendly Insulation Medium: Uses environmentally friendly insulating media to replace SF₆ gas, offering a greener solution with no greenhouse effect.

Fully Enclosed Structure: Provides strong protection performance and adapts well to harsh environments such as humidity and dust.

Compact Size: The compact structure occupies less space and allows flexible installation and deployment.

Stable and Reliable Operation: Delivers dependable performance, long maintenance-free intervals, and low operating costs.

Comprehensive Interlocking Protection: Equipped with a complete interlocking protection system for higher safety and lower fault risk.

Modular Design: Modular construction allows flexible combinations to suit various power distribution schemes.

Operating Conditions

Voltage: 3-11kV.

Frequency: 50Hz/60Hz.

Temperature: -25°C to +55°C.

Humidity: Up to 90%.

Altitude: Up to 2000m.

Application

The XGN-12 environmental protection cabinet is mainly used in urban power grids, residential area power distribution, industrial and mining enterprises, municipal infrastructure, and other places with environmental protection requirements. It serves as a ring network power supply, terminal power distribution, and protection equipment for the 3.6kV to 12kV system.

Model meaning

Technical Parameters

Overall and mounting dimensions(mm)（Reference）

Model meaning

XGN-12 Environmentally Friendly Ring Main Unit	X:	Box-type structure
	G:	Fixed-type installation
	N:	Indoor type

Technical Parameters

Item	Specification
Rated Voltage	12 kV
Rated Frequency	50 Hz
Rated Current	630 A
Rated Short-Circuit Breaking Current	20 kA / 25 kA
Rated Short-Time Withstand Current	20 kA / 25 kA (1 s)
Rated Peak Withstand Current	50 kA / 63 kA
Insulation Type	Eco-friendly gas or solid insulation, SF₆-free
Degree of Protection	IP40 / IP54
Mechanical Endurance	≥ 10,000 operations
Ambient Temperature	-30°C to +40°C
Installation Altitude	≤ 2000 m
Applicable Standards	GB/T 3906, GB/T 11022

Overall and mounting dimensions(mm)（Reference）

XGN-12 size diagram

Custom XGN‑12 Environmentally Friendly Ring Main Unit Solutions for Your Project

(The values can be customized according to local project requirements.)

If you have specific requirements for the parameters, structure, or configuration of the XGN‑12 environmentally friendly ring main unit (RMU), please contact us. Our team of account managers, technical engineers, and product consultants will assess your power distribution design, rated specifications, installation environment, switching needs, protection and control requirements, and project timeline to provide a tailored solution that fits your application scenario with precision.

We can customize rated voltage (typically 12 kV), rated current capacity, insulation type (dry air, solid/epoxy or environmentally friendly gas‑filled), load break switch and protection device configuration (load switch, vacuum interrupter, circuit breaker, or combination units), compartment layout, busbar arrangement, enclosure protection grade, intelligent control and monitoring systems, and other key design details to ensure reliable and safe operation in your medium‑voltage distribution network. The XGN‑12 RMU is designed with compact, fully enclosed insulated technology that delivers strong dielectric performance, excellent reliability, long service life, and low maintenance requirements, making it ideal for urban distribution systems, secondary substations, cable ring networks, industrial and commercial facilities, and applications where sustainability and operational safety are essential

FAQ

What is a ring main unit (RMU)?

A ring main unit (RMU) is a factory‑assembled, metal‑enclosed switchgear used in medium‑voltage distribution networks, typically in ring‑type configurations to control, protect, and distribute electrical power efficiently.

What does “environmentally friendly” mean in a ring main unit?

“Environmentally friendly” RMUs often use insulation media such as dry air, natural gases, or eco‑friendly alternatives to SF₆, reducing greenhouse impact and improving safety without compromising electrical performance.

Where are RMUs typically installed?

RMUs are commonly used in secondary distribution networks, urban power grids, industrial facilities, commercial buildings, and substations where reliable medium‑voltage distribution and fault isolation are needed.

What is the main purpose of a ring main unit?

The main purpose of an RMU is to enable safe switching, protection, and distribution of electricity in a looped (ring) network, helping maintain continuous power supply even when part of the network is under maintenance or faulted.

How does an RMU improve power distribution reliability?

In a ring configuration, if a fault occurs on one section, the RMU allows rerouting power through alternate paths, minimizing outages and maintaining supply continuity for connected loads.

What types of switching devices are used in RMUs?

RMUs typically integrate switches, load break switches, and circuit breakers, which may be vacuum or gas‑insulated types depending on design and insulation medium.

What are the advantages of compact RMU design?

RMUs are compact and fully enclosed units that save space, reduce maintenance needs, enhance safety by isolating live parts, and simplify installation compared to traditional switchgear.

What voltage levels are RMUs commonly designed for?

RMUs are usually designed for medium‑voltage distribution networks, often ranging from approximately 7.2 kV up to 33 kV, depending on system application and regional standards.

Can RMUs be used both indoors and outdoors?

Yes. With appropriate design and protection ratings, RMUs can be installed indoors in distribution rooms or outdoors in substations and compact distribution sites.

What factors should be considered when selecting an RMU?

Important factors include rated voltage and current, insulation medium (e.g., eco‑friendly alternatives), number of feeders (ways), protection requirements, environmental conditions, and space constraints.

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Nearly 20 Years of Industry Experience

10,000⁺ Units/Year Production Capacity

40,000^m²+ Factory Area

500⁺ Power Utility Clients

1 Billion⁺ CNY Annual Sales Revenue

XGN-12 environmentally friendly Ring Main Unit