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A 12kV SF6 ring main unit for compact, reliable cable ring networks and terminal power distribution.
Designed for electrical distribution systems that require stable operation, clear circuit protection, and practical installation for industrial, commercial, utility, and infrastructure projects.
Dongfang Electric Power (Shandong) Co., Ltd. supports product selection by voltage level, rated current, installation environment, cabinet structure, cable connection method, and project documentation needs.
XGN-12 Ring Main Unit
Product Overview
The XGN-12 AC modular SF6 ring main unit is a new-generation metal-enclosed switchgear using an SF6 load switch as the main switch. The cabinet body is processed from high-strength aluminum-zinc coated sheet by CNC equipment into a modular structure. It uses air insulation and reaches protection grade IP3X. It has a compact structure, flexible operation, convenient installation, multiple interlocks, high grade, miniaturization, complete parameters, low price and low maintenance. Operation can be manual or electric.
The product uses a three-position arc chamber with closing, opening and earthing positions, and is equipped with five-prevention functions. It prevents load opening and closing of the disconnector, prevents accidental entry into a live compartment, prevents accidental closing of the earthing switch, prevents accidental energizing of the earthing line, and prevents load operation of the main switch. The interlocking is reliable. The product has high insulation strength, large creepage distance design, pressure-protected outgoing terminals, special moving and static sealing design, advanced technical performance and flexible assembly schemes. It is a new-generation high-voltage switchgear for urban power grids.
Functions and Features
The SF6 load switch gas provides good arc-extinguishing performance. During current interruption, when the moving and static contacts separate, an arc is generated. Under the action of the permanent magnetic field, the arc rotates quickly, is elongated and continuously combines with SF6 gas for rapid dissociation and cooling, and is extinguished at current zero. The double-break opening has the insulation level of an isolating gap. The permanent-magnet rotating arc principle provides low operating force, strong arc-extinguishing capacity, light contact burning and extended electrical life.
Main Application
It is suitable for AC 12kV, 50Hz power systems and is widely used in industrial and civil cable ring networks and power terminals for receiving and distributing electric power. It is especially suitable for urban residential distribution, small secondary substations, small switching stations, industrial and mining enterprises, high-rise buildings, shopping malls, airports, subways, hospitals and stadiums.
Use Environment
Model Description
| X | Box type |
|---|---|
| G | Fixed type |
| N | Indoor type |
| Design No. | Design sequence number |
| 12 | Voltage grade |
Main Technical Parameters
| Rated Voltage | 12kV |
|---|---|
| Rated Current | 630A |
| Rated Frequency | 50Hz |
| Rated Active Load Breaking Current | 630A |
| Rated Closed-Loop Breaking Current | 630A |
| Rated Cable-Charging Breaking Current | 10A |
| Rated Short-Circuit Making Current, Peak | 50kA |
| Rated Short-Time Withstand Current, Main Circuit | 20kA / 3s |
| Rated Short-Time Withstand Current, Earthing Switch | 20kA / 3s |
| Rated Short-Time Withstand Current | 20kA |
| Rated Peak Withstand Current | 50kA |
| Rated Short-Time Power-Frequency Withstand Voltage, Fracture | 42kV |
| Rated Lightning Impulse Withstand Voltage, Fracture | 75kV |
| Rated Short-Time Power-Frequency Withstand Voltage, Isolation Gap | 48kV |
| Rated Lightning Impulse Withstand Voltage, Isolation Gap | 85kV |
| Mechanical Life | 5000 operations |
| Protection Grade | IP3X |
Products are selected for reliable distribution, protection, switching, and control in practical power systems.
Equipment can be matched to voltage level, capacity, cabinet structure, cable entry, and installation environment.
Technical documents, drawings, labels, packing, and delivery requirements can be coordinated for project use.
Dongfang Electric Power (Shandong) Co., Ltd. focuses on project-oriented power distribution equipment, including distribution boxes, distribution cabinets, withdrawable switchgear, ring main units, cable branch boxes, compensation cabinets, metering systems, busway systems, and power cables.
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