The SH-12 SF6 gas-insulated ring main unit is designed for 12kV distribution networks, ideal for urban ring main and power terminal systems. All high-voltage components are hermetically sealed within a 304 stainless steel tank filled with SF6 gas, providing an IP67 protection rating. Compliant with State Grid standardized requirements, it can be supplied as a factory-integrated automation solution for primary/secondary fused systems, and is widely used in substations, industrial plants, commercial complexes, and infrastructure projects.
| Item | Load switch | Composite apparatus | Circuit breaker | |
| Rated voltage | 12 | 12 | 12 | |
| Rated frequency | 50 | 50 | 50 | |
| Main busbar rated current | 630 | 630 | 630 | |
| Rated current | 630 | 125 | 630 | |
| Rated short-circuit breaking current | 31.5 | 20 | ||
| Rated transfer current | 1700 | |||
| Rated short-time withstand current | Main circuit | 20 | 20 | |
| Earthing switch | 20 | 20 | ||
| Earthing connection circuit | 17.4 | 17.4 | ||
| Rated peak withstand current | Main circuit | 50 | 50 | |
| Earthing switch | 50 | 50 | ||
| Earthing connection circuit | 43.5 | 43.5 | ||
| Rated short-circuit making current | 50 | 50 | ||
| Power-frequency withstand voltage | phase-to-earth, phase-to-phase | 42 | 42 | 42 |
| across open contacts | 48 | 48 | 48 | |
| Lightning impulse | phase-to-earth, phase-to-phase | 75 | 75 | 75 |
| across open contacts | 85 | 85 | 85 | |
Our switchgear, including C-GIS and ring main units, features a compact and modular design, saving valuable installation space and allowing for flexible expansion and easy on-site assembly.
With all high-voltage components sealed in a stainless-steel gas tank, our equipment is protected from environmental factors. It features reliable mechanical and electrical interlocks to ensure the safety of operators.
Committed to sustainability, we offer eco-friendly switchgear that uses dry air as the insulating medium, completely eliminating SF₆ gas and minimizing environmental impact.
The fully sealed and insulated design ensures our switchgear is virtually maintenance-free throughout its service life, significantly reducing operational costs and downtime.
Our products can be integrated with intelligent solutions, supporting remote monitoring, control, and automated distribution systems, which is crucial for building modern smart grids.
Ideal for secondary distribution substations, industrial parks, commercial buildings, and residential communities, providing reliable power control and protection.
Perfectly suited for renewable energy applications such as wind farms and solar power plants, where compact and reliable switchgear is essential for power collection and grid connection.
Deployed in critical infrastructure like subways, railways, airports, and tunnels, where space is limited and high reliability is non-negotiable.
Used in demanding environments such as mining, petrochemical plants, and data centers that require robust, safe, and uninterrupted power management.
