The SF₆ gas-insulated ring main unit used in 12kV distribution network systems features a compact structure, small footprint, and modular design. It offers reliable electrical and mechanical performance with a fully enclosed structure, ensuring operational reliability and personal safety. It is maintenance-free, with all components made from standard parts, and the combination of modular components widely meets the requirements of various design schemes.

Main Technical Features:

Flexible and Versatile Solutions, Strong Expandability

Single gas tank or multi-unit shared tank configurations allow flexible combinations, with options for left, right, or top expansion, and easy connection via busbar connectors.

Safe and Environmentally Friendly

Comprehensive "five-proof interlocking," high insulation performance, strong breaking capacity, excellent dynamic and thermal stability, reliable pressure relief channels, passing the 20kA/1s arc test, with an annual leakage rate of ≤0.05%.

Long Mechanical Life

Circuit breaker: 10,000 operations; three-position switch: 3,000 operations.

Compact Structure

Load switch cabinet / circuit breaker cabinet width can be 325, 375, or 420mm; voltage transformer cabinet: 600mm; metering cabinet: 750mm.

High Protection Rating

High-voltage live components are enclosed in a stainless steel tank, with the gas tank achieving an IP67 protection rating, realizing full insulation, full enclosure, and maintenance-free operation.

Intelligent Integration

When paired with DTU station terminals, it supports intelligent distribution network functions such as protection, three-remote operations, online monitoring, and fault handling.