SF6 Gas-insulated Ring Main Unit

The HCXGN series SF6 gas-insulated ring main unit (RMU) is a new type of SF6 gas-insulated medium-voltage switchgear independently developed by Jiangsu Huachen Transformer Co., Ltd. The product adopts a modular design and can be arranged arbitrarily according to different design schemes, achieving a perfect combination of common-box units and single-gas-box units, meeting the flexible usage requirements of various secondary power distribution substations for compact switch cabinets.

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Product Description

Product Features

The HCXGN series of switchgear is a fully sealed system. All primary components are enclosed within a stainless steel housing, which ensures they are protected from external environmental influences and possesses the following core advantages:

1.Safe and reliable:

Stable operation, effectively ensuring electrical safety.

2.Compact structure:

Compact design, occupying little space, suitable for installation in various scenarios.

3.Maintenance-free and long lifespan:

No frequent maintenance required, with a long equipment lifespan.

4.This product has passed the type test of the national-level high-voltage electrical test center and is widely used in: small secondary distribution stations, box-type switchgear stations, industrial and mining enterprises, airports, railways, commercial areas, high-rise buildings, highways, subways, tunnels, and areas with harsh natural conditions.

Installation Dimensions

40.5kV Standard Dimensions

Depth: 970mm
Height: 1900mm (without meter box, customizable)
Meter box height options: 200mm, 350mm, 470mm
Gas box clear width:

1 common-box unit: 500mm (C) / 500mm (V)
2 common-box units: 1000mm (C) / 1000mm (V)

12/24kV Standard Dimensions

Common-box Units	Gas Box Clear Width (mm)
1	325 / 375
2	650 / 750
3	975 / 1125
4	1300 / 1500
Note: Total cabinet width depends on end-plate configuration; standard national grid sizes are available.

Executive standard

Standard	Title
GB/T 3804	3.6kV~40.5kV High-Voltage Alternating Current Load Switches
GB/T 1984	High-Voltage Alternating Current Circuit-Breakers
GB/T 16926	High-Voltage Alternating Current Load Switch+Fuse Combinations
GB/T 1985	High-Voltage Alternating Current Disconnectors and Earthing Switches
GB/T 3906	3.6kV~40.5kV AC Metal-Enclosed Switchgear and Controlgear
GB/T 11022	Common Technical Requirements for High-Voltage Switchgear and Controlgear Standards
GB/T 4208	Degrees of Protection Provided by Enclosures (IP Code)
DL/T 404	3.6kV~40.5kV AC Metal-Enclosed Switchgear and Controlgear
GB/T 311.1	Insulation Coordination – Part 1: Definitions, Principles and Rules
12kV Ring Main Unit (Box) Standardized Design and Customization Scheme (2020 Edition)