12kV Eco-Friendly Gas Insulated AC Metal-Enclosed Ring Main Unit

Product Overview

The HCBXGN-12 series eco-friendly gas insulated AC metal-enclosed switchgear and control equipment is an independently developed medium voltage (MV) switchgear solution from Jiangsu Huachen Transformer Co., Ltd. (listed company, stock code: 603097). Engineered for secondary power transmission and distribution applications, this fully sealed RMU encloses all primary live components and switching mechanisms inside a robust stainless steel enclosure, delivering reliable operation completely immune to harsh external environmental conditions.

With a modular design, the HCBXGN-12 series supports flexible arrangement based on custom project specifications, enabling seamless combination of common-box and expandable units to meet the compact switchgear requirements of secondary power distribution substations. This SF6-free, environmentally sustainable switchgear has passed full type tests from national authoritative high-voltage electrical testing centers, making it a trusted solution for utility operators, EPC contractors, infrastructure developers, and industrial facility managers worldwide.

Model Designation & Unit Configuration

Model Coding Breakdown

Standard Unit Code Definition

Core Features & Project Benefits

Eco-Friendly SF6-Free Insulation System

This RMU adopts an environmentally sustainable gas insulation solution, eliminating the use of SF6 greenhouse gas which is subject to strict global F-Gas regulations. For procurement professionals and project developers, this design ensures full compliance with ESG requirements, eliminates carbon emission compliance risks, and supports sustainable project certification across global markets.

Fully Sealed Stainless Steel Enclosure for Unmatched Reliability

All primary live components and switching mechanisms are fully enclosed within a corrosion-resistant stainless steel housing, creating a completely isolated system unaffected by dust, humidity, salt spray, chemical corrosion, and other harsh environmental conditions. This design minimizes arc fault risks, enhances on-site personnel safety, and reduces unplanned downtime for critical power distribution networks, delivering long-term operational stability for industrial facilities and infrastructure projects.

Modular Compact Design for Flexible Customization

The HCBXGN-12 series features a modular structure that supports free combination and arrangement according to custom project design schemes, with full compatibility between common-box and expandable units. The compact footprint significantly reduces required installation space, lowers civil construction costs for substations, and shortens on-site installation cycles, helping engineering contractors meet tight project timelines and budget requirements.

Maintenance-Free Design for Reduced Lifecycle Costs

Engineered for long service life with minimal maintenance requirements, this type-tested switchgear eliminates the need for frequent routine maintenance, reduces power outage time for upkeep, and delivers substantial cost savings over the full lifecycle of the project. This makes it an ideal choice for remote or hard-to-access installations such as tunnels, highways, and remote mining sites.

Technical Specifications & Installation Dimensions

Core Electrical Parameters

Standard Installation Dimensions

Applicable Standards & Compliance

The HCBXGN-12 series is designed and manufactured in full compliance with international and national standards, with all performance indicators verified through authoritative type tests. The core applicable standards include:

IEC 62271-1: High-voltage switchgear and controlgear - Part 1: Common specifications (corresponding to GB/T 11022 / DL/T 593)

IEC 62271-200: AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to 52 kV (corresponding to GB/T 3906 / DL/T 404)

IEC 62271-100: High-voltage alternating current circuit-breakers (corresponding to GB/T 1984 / DL/T 402)

IEC 62271-102: High-voltage alternating current disconnectors and earthing switches (corresponding to GB/T 1985)

IEC 62271-103: High-voltage alternating current switch-fuse combinations (corresponding to GB/T 3804)

GB/T 311.1: Insulation co-ordination - Part 1: Definitions, principles and rules

GB/T 4208: Degrees of protection provided by enclosures (IP code)

12kV Ring Main Unit Standardized Design Specification (2023 Edition)

Applications & Industry Use Cases

Power Distribution & Utility Networks

Secondary distribution substations, prefabricated switchyards, compact box-type substations, and urban power distribution networks, delivering space-saving, reliable switching solutions for utility operators.

Transportation & Infrastructure

Airports, railways, highways, metro systems, underground tunnels, and bridge projects, with the fully sealed structure and maintenance-free design perfectly adapted to harsh, hard-to-access infrastructure environments.

Commercial & High-Rise Buildings

Central business districts, high-rise residential and commercial complexes, shopping malls, and urban public facilities, with the compact design fitting limited electrical room space and ensuring safe, stable power supply for dense population areas.

Industrial & Mining Facilities

Manufacturing plants, industrial parks, mining operations, and remote industrial sites, with robust environmental adaptability and reliable performance to support continuous industrial production.