SRM6-12 Fully Insulated Gas-Filled Ring Main Switchgear

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SRM6-12 Fully Insulated Gas-Filled Ring Main Switchgear

SRM6-12 Fully Insulated Gas-Filled Ring Main Switchgear

The SRM6-12 Fully Insulated Gas-Filled Ring Main Switchgear is a compact and sealed medium-voltage distribution unit designed for use in 12kV power systems. 

Product Advantages
Fully Insulated and Sealed Structure
All live parts are enclosed in an SF₆-filled stainless steel tank, which helps to reduce external influence from dust, humidity, or contaminants.The sealed design minimizes the need for maintenance over time.

Compact and Modular Layout
The compact footprint makes it suitable for space-limited areas such as basements, kiosks, or mobile substations.Modular design allows different functional units to be flexibly combined to match specific distribution schemes.

Environmental Adaptability
The enclosure provides protection against moisture, dust, and small particles, enabling stable performance in coastal, industrial, or polluted regions.Resistant to corrosion due to the use of high-quality stainless steel materials.

Product Features
Gas-Insulated Metal Tank
The SF₆-insulated tank houses switches and live parts and is sealed for life, reducing operational concerns.A pressure relief system is integrated for additional protection under abnormal internal pressure conditions.

Modular Function Units
Includes load break switches, vacuum circuit breakers, and fuse-switch combinations in different module options.Modules are factory-assembled and tested to support ease of site installation.


Product Applications
Urban Distribution Networks
Widely used in medium-voltage distribution for residential, commercial, and mixed-use developments.Ensures stable power supply and simplifies network management in dense city environments.

Renewable Energy and Industrial Zones
Applied in wind farms, solar stations, and industrial parks where modular grid connection and protection are needed.Helps manage distributed energy inputs safely and efficiently.

Project Unit C module F module V module CB module
Composite switch Gis Vacuum Isolation/grounding switch Vacuum Circuit Breaker Isolation/grounding switch
Rated voltage KV 12 12 Switch 12 12 12
Rated frequency Hz 50 50 12 50 50 50
Power frequency withstand voltage(phase to phase/port) kV 42/48 42/48 50 42/48 42/48 42/48
Lightning impulse withstand voltage kV 75/85 75/85 42/48 75/85 75/85 75/85
Rated current A 630 1) 75/85 1250/630 1250/630
Rated closed loop breaking current A 630 630
Rated cable-charging breaking current A 135/135
Rated short-circuit closing current(peak) A 50 80
Rated peak withstand current kA 50
Rated short-time withstand current kA/3s 20
Rated short circuit breaking current kA 31.5 20 25 25
Rated transfer current A 1750
Maximum current of equipped fuse A 125
Loop resistance  -N ≤300 ≤600
Mechanical life Order 5000 3000 5000 2000 5000 5000
Note: 1) Depends on the current rating of the fuse

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