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Eco-Friendly Gas-Insulated RMU
Eco-Friendly Gas-Insulated RMU Eco-Friendly Gas-Insulated RMU
Eco-Friendly Gas-Insulated RMU Eco-Friendly Gas-Insulated RMU
Eco-Friendly Gas-Insulated RMU Eco-Friendly Gas-Insulated RMU
Eco-Friendly Gas-Insulated RMU Eco-Friendly Gas-Insulated RMU
Eco-Friendly Gas-Insulated RMU Eco-Friendly Gas-Insulated RMU

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Eco-Safe Gas-Insulated Ring Main Unit

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The HXGN(H) -12 environmental-friendly gas-insulated ring main unit series is a complete set of power distribution equipment for 12kV, three-phase AC 50Hz, single-busbar and single-busbar section systems. This product features simple structure, flexible operation, reliable interlocking, and easy installation. It can provide satisfactory technical solutions for various application scenarios and different users. The adoption of sensing technology and information technology, combined with advanced technical performance and convenient and flexible configuration schemes, can meet the constantly changing market demands and is suitable for the requirements of smart grids.
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Product Overview


The Eco-Friendly Gas-Insulated RMU (HXGN(H)-12 series) is a cutting-edge medium-voltage power distribution equipment designed for modern power systems. As a gas-insulated ring main unit, it operates in 12kV three-phase AC systems, providing a reliable and sustainable solution for power reception and distribution. Unlike traditional units relying on harmful gases, this product adopts non-toxic insulating media, aligning with global environmental protection trends and smart grid requirements. Its compact structure and flexible configuration make it a preferred choice for various power distribution scenarios, balancing performance, safety, and eco-friendliness. Whether for urban areas, industrial zones, or special environments, the Eco-Friendly Gas-Insulated RMU delivers consistent and efficient power distribution support.


1Ring-Main-Unit


Functionality


Insulation Medium Operation

At the core of its functionality is the use of environmentally friendly insulating media such as nitrogen (N₂) or dry air. This medium replaces harmful alternatives, ensuring no toxic emissions during operation while maintaining excellent insulating performance. The sealed design of the high-pressure chamber retains the medium effectively, supporting stable operation even in fluctuating environmental conditions.


Interlocking System Function

The Eco-Friendly Gas-Insulated RMU is equipped with a sophisticated interlocking system that prevents misoperation. The three-phase isolation fracture is clearly visible, allowing operators to verify the circuit state at a glance. This functionality ensures that disconnectors and earthing switches cannot be operated when the circuit breaker is active, eliminating potential safety hazards.


Simplified Operation Mechanism

The product features a streamlined operation design, with a single operating handle for both disconnector and earthing switch. This eliminates the need for complex identification processes, enabling quick and accurate operation without professional technical training. The mechanism’s reliability ensures consistent performance even with frequent use.


Intelligent Monitoring Capability

Integrated with sensing technology and information technology, the Eco-Friendly Gas-Insulated RMU offers real-time online monitoring. It tracks equipment operating status, sending timely notifications to users for any anomalies. This functionality enhances distribution network automation, reducing the need for manual inspections and improving overall operational efficiency.


Characteristic Advantages


Environmentally Friendly Design

The Eco-Friendly Gas-Insulated RMU stands out for its strict environmental compliance. All production materials are non-toxic and recyclable, minimizing environmental impact throughout the product lifecycle. By avoiding greenhouse gas emissions, it supports sustainable development goals and meets stringent environmental regulations worldwide.


Maintenance-Free Operation

Most components of the gas-insulated ring main unit are fully sealed, excluding the high-voltage switch operating mechanism. This design eliminates the need for regular cleaning and maintenance, significantly reducing operational costs for power enterprises. The high degree of automation further cuts down labor requirements, optimizing resource allocation.


Enhanced Safety Performance

Safety is a top priority, with reinforced phase-to-phase isolation structures to prevent short-circuit expansion or explosions. The adoption of vacuum interrupters with explosion-proof properties and solid-sealed poles adds an extra layer of protection. The fully insulated and enclosed design also allows temporary water ingress without disrupting operation, provided basic cleaning and drying measures are taken.


User-Friendly Operability

The simplified operation interface and interlocking protection make the Eco-Friendly Gas-Insulated RMU accessible to operators of all skill levels. No complex technical training is required, reducing human error and ensuring smooth daily operations. The intuitive design enhances work efficiency and minimizes downtime.


Smart Grid Compatibility

With reserved intelligent interfaces and sensor installation positions, the product seamlessly integrates with smart grid systems. It can be upgraded with additional intelligent equipment to meet evolving network demands, supporting remote monitoring, data analysis, and automated control for modern power distribution networks.


Applications


Urban Residential Power Distribution

Ideal for urban residential areas, the Eco-Friendly Gas-Insulated RMU provides safe and reliable power distribution for communities. Its compact size and low noise operation make it suitable for installation in basements or residential utility rooms without disrupting daily life.


Industrial and Commercial Premises

Industrial and mining enterprises, shopping malls, and office buildings benefit from the product’s robust performance and flexible configuration. It adapts to the varying power demands of commercial facilities, ensuring stable power supply for machinery, lighting, and other critical systems.


Transportation Hub Power Supply

Airports, subways, railways, and tunnels require power distribution equipment that can withstand harsh conditions. The Eco-Friendly Gas-Insulated RMU’s resistance to high humidity, salt spray, and temperature fluctuations makes it an excellent choice for these high-traffic areas.


Special Environment Installations

It excels in special environments such as high-altitude regions, strong wind and sand areas, and severe cold zones. The sealed design and environmentally friendly insulating medium ensure reliable operation in conditions where traditional equipment may fail, making it versatile for diverse geographical locations.


FAQ


Is the Eco-Friendly Gas-Insulated RMU truly non-toxic?

Yes, all materials used in production are non-toxic and harmless. The insulating media (N₂ or dry air) emits no toxic substances during operation, and the product is fully recyclable at the end of its service life, ensuring complete environmental safety.


Can it be installed in confined spaces?

Absolutely. The Eco-Friendly Gas-Insulated RMU has a compact structure and requires no special ventilation, making it suitable for confined spaces like basements, tunnels, and ship cabins. Its low emission design ensures safety in enclosed environments.


Does it replace SF6-based ring main units?

Yes, it is a direct replacement for SF₆ load switch ring main units. It offers equivalent or superior performance without the environmental harm associated with SF₆, aligning with global efforts to reduce greenhouse gas emissions.


Rated voltage
ProjectUnit
Parameter
Rated frequency

KV

12




HZ

50

Rated insulation level1min power frequency withstand voltage

To ground, between phases

KV

42

Isolating break

48

"Lightning impulse withstand voltage (peak value)"

To ground, between phases

KV

75

Isolating break

85

1min power frequency withstand voltage of auxiliary/control circuit (to ground)KV

2

Rated currentA630
Rated short - time withstand current (effective value)Main circuit / Earthing switch

KA

25/4s

Earthing connection circuit

21.7/4s

Rated peak withstand current

Main circuit / Earthing switch

KA

63

Earthing connection circuit54.5
Rated short - circuit breaking current and times

KA/per time

25/30

Rated short - circuit making current (peak value)

KA63
Rated cable charging breaking current

A25
Rated operating sequence of circuit breaker


O - 0.3s - CO - 180s - CO
Mechanical lifeCircuit breaker / Isolating switch

per time

10000/3000
Protection class

Sealed cabinet



IP67

Switchgear enclosure



IP4X

Gas pressure

Rated gas filling level (20°C, gauge pressure)


MPA

0.02

Minimum functional gas level (20°C, gauge pressure)


MPA

0

Sealing performanceAnnual leakage rate
% per year≤0.05


Telephone

+86-19518180858
+86-19518180868
​Copyright © 2025 Zhejiang Shengxian Electric Power Technology Co., Ltd. All Rights Reserved.

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