Product Introduction
The SRM □ -12 fully enclosed, fully insulated gas-insulated ring main unit is an SF6 gas-insulated metal-enclosed switchgear. It can be made up of modules such as load switch units, load switch-fuse combination units, vacuum circuit breaker units, and busbar incoming units. Using a range of advanced technologies and materials, it has excellent electrical and mechanical performance, is minimally affected by the environment and climate, is compact, easy to install, simple to operate, maintenance-free, and offers flexible combinations. The design is clear and intuitive, operation is straightforward, and it can handle large feeder connection capacities, making it suitable for various wiring systems.
Unit Definitions
| Unit Code | Meaning |
| C | Standard single-bushing load switch unit |
| F | Load switch-fuse combination unit |
| V | Circuit breaker unit |
| D | Cable incoming unit (without switch) |
| Busbar-side bushing | |
| - | Top busbar bushing |
| SL | Bus coupler unit |
| M | Metering unit |
| PT | PT unit |
| 1K2(4) | Double-bushing outgoing load switch unit |
Product Features
Safe Operation:
Through the following safety measures, we provide special protection for users:
Integrated three-position load switch
The circuit breaker uses a load switch instead of an isolating switch for greater safety and reliability. The fully enclosed primary side design prevents accidental contact. Mechanical interlocks meet the five-prevention requirements. Live-line indicators reliably show incoming and outgoing line status. The fully enclosed design keeps 10kV switch and busbar live parts sealed inside a gas-tight box made of 3mm stainless steel. Silicone rubber cable plugs achieve fully insulated, fully sealed cable heads, protecting against dust, moisture, small animals, and other environmental influences. The spring-powered operating mechanism can be manually or electrically operated, and the panel schematic shows the switch positions. The cabinet is made of galvanized steel with an electrostatic spray finish for enhanced corrosion resistance. A pressure gauge monitors SF6 gas pressure within the safe range.
Economical:
Maintenance-free
Highly reliable
Service life up to 20 years
Flexible Schemes:
Multiple incoming line options, allowing left, right, top, or front incoming lines
Various combination possibilities; units can be freely combined
Using insulated busbars, units can be arranged front-to-back or side-by-side
Flexible design scheme
Wide Applications:
Large outgoing line capacity, small footprint, suitable for various application needs.