Ring Main Unit

Rated Voltage: 12kV / 24kV

Rated Current: 630A

Compliance Standard: IEC 62271

Insulation Type: SF6 gas insulated, vacuum insulated

Main Product Features

Compact structure, maintenance‑free, safe and reliable operation, reliable performance, compact design, efficient operation.

Application Scope

Suitable for power plants, industrial facilities, commercial buildings, residential communities and utility networks. It serves as a dependable medium‑voltage distribution device, widely used in urban grid renovation, box‑type substations and various infrastructure projects.

1. Product Features

Our Ring Main Unit features compact design for space‑saving installation in limited‑space substations. It adopts modular structure to support flexible expansion and configuration to satisfy diverse project requirements. With sealed‑tank construction, the ring main unit is maintenance‑free and greatly reduces routine servicing work. Built‑in internal arc‑resistant structure delivers high‑safety performance to protect operators and equipment.

It ensures reliable long‑term operation with extended service life and stable output. Optional smart monitoring system is available to realize real‑time status tracking. Key components include load break switch, busbar chamber, fuse protection unit, cable compartment and operating mechanism. Each compartment is reasonably divided to improve safety during daily operation and inspection. This RMU is well‑suited for ring‑network power supply scenarios and can work cooperatively with distribution transformers and other switchgears. Customized configuration is supported for different global medium‑voltage distribution projects.

Detailed product description：

2. Actual Factory Photos

These real‑shot factory photos show our complete manufacturing and inspection process for Ring Main Unit. Every RMU goes through strict assembly, internal wiring inspection and function testing inside our standardized workshop. The intelligent control panel provides intuitive human‑machine interaction for convenient local operation and parameter checking. Neat internal wiring guarantees stable signal transmission and easy troubleshooting.

Each unit is equipped with a clear operation interface for simple and safe on‑site manipulation. Finished products are well‑packed before delivery to avoid damage during long‑distance transportation. As a professional manufacturer, we strictly control quality from raw material incoming to finished‑product shipment. Our RMUs are widely exported for power plants, industrial parks, residential districts and utility grid projects. We support OEM & ODM, and can adjust cabinet combination according to customer’s actual power‑distribution demands.

3. SF6 / Vacuum Insulated Ring Main Unit

This SF6 or vacuum insulated Ring Main Unit is a proven reliable medium‑voltage distribution solution. Its rated voltage covers 12kV and 24kV, rated current reaches 630A, and the whole product complies with IEC 62271 international standard. Benefiting from compact structure and maintenance‑free sealed tank design, it achieves safe and efficient long‑time running.

Available with SF6 gas insulation or vacuum insulation options, the RMU delivers consistent reliable performance. Modular combination makes cabinet layout flexible for ring main power supply, fault isolation and load protection tasks. It is extensively applied in power plants, industrial facilities, commercial buildings, residential communities and utility networks. Matched with distribution transformers, it is widely adopted for urban grid upgrade and box‑substation projects. We provide tailored configuration service to meet different technical requirements from worldwide buyers.