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XGN12
XGN12 Air Insulated Switchgear
The 12kV air-insulated ring main unit is a high-voltage compact equipment in the medium-voltage distribution network, primarily designed to meet the 12kV distribution needs of power system hubs, super-large industrial enterprises, and high-end new energy projects. Utilizing air as the insulating medium, it integrates a high-strength insulation structure, large-capacity current-carrying design, and intelligent linkage technology. It possesses core functions such as main line power supply, ring network interconnection, large load access, and rapid fault clearance. The equipment combines high-voltage adaptability with spatial compactness, enabling centralized control of high-voltage distribution networks within limited spaces. It serves as a crucial hub equipment connecting high-voltage distribution networks with medium and low-voltage loads.
Features
1. High-voltage and high-capacity compatibility:
The insulation structure has undergone multiple reinforcement treatments, withstanding the test of 12kV high-voltage insulation. With a rated current up to 3150A and a short-circuit breaking current of up to 40kA, it can accommodate the needs of extremely large load access and high-current transmission on main lines.
2. Compact high-voltage design:
Compared to traditional open-type equipment of the same voltage level, the cabinet volume is reduced by more than 55%. The layered layout optimizes space utilization, allowing direct installation in underground distribution rooms, high-rise building power distribution rooms, and other space-constrained scenarios, significantly reducing construction costs.
3. Deep intelligent linkage:
It supports deep linkage with power grid dispatching systems, new energy control platforms, and enterprise production dispatching systems. It possesses functions such as power quality analysis, load forecasting, and remote precise regulation and control, enabling refined management and unmanned operation and maintenance of the distribution network.
4. Long-term stable operation:
The core components are made of military-grade aging-resistant materials, and the sealing structure adopts a dual-channel waterproof and dustproof design. The mean time between failures (MTBF) is over 120,000 hours, supporting frequent operation and adapting to the continuous operation requirements of high-voltage distribution networks.
Execution standards: GB/T 3906-2020, IEC 62271-201; Rated current: 1600A-3150A; Short-circuit breaking current: 31.5kA-40kA; Protection level: IP4X (IP55 for outdoor type); Installation methods: Indoor floor-mounted, outdoor prefabricated (integrated with box transformer), embedded in underground distribution room; Optional configurations: Vacuum circuit breaker, power quality monitoring module, fire linkage device, intelligent energy storage operating mechanism.
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Specification
| No. | Name | Unit | Value |
| 1 | Rated Voltage | kV | 12 |
| 2 | Rated Frequency | Hz | 50 |
| 3 | Rated Current of Main Busbar / Maximum Rated Current of Fuse | A | 630, 125 |
| 4 | Rated Short-time Withstand Current of Main Circuit & Grounding Circuit | kA/S | 20, 3 |
| 5 | Rated Peak Withstand Current of Main Circuit & Grounding Circuit | kA | 50 |
| 6 | Rated Short-circuit Making Current of Main Circuit & Grounding Circuit | kA | 50 |
| 7 | Full Capacity Opening Times of Load Switch | times | 100 |
| 8 | Fuse Breaking Current | kA | 31.5 |
| 9 | Rated Closed-loop Breaking Current | A | 630 |
| 10 | Rated Transfer Current | A | 1600 |
| 11 | Mechanical Life | times | 2000 |
| 12 | 1min Power Frequency Withstand Voltage (Peak) – Phase-to-Phase & Phase-to-Earth / Isolation Break | kV | 28/32 |
| 13 | Lightning Impulse Withstand Voltage (Peak) – Phase-to-Phase & Phase-to-Earth / Isolation Break | kV | 75/85 |
| 14 | 1min Power Frequency Withstand Voltage of Secondary Circuit | kV | 2 |
| 15 | Protection Class | IP3X |
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FAQs
What are the advantages of using 12kV air-insulated ring main units in high-rise buildings?
The core advantage is its compact size, which allows it to fit into the narrow space of distribution rooms in high-rise buildings. It also boasts excellent sealing and anti-condensation performance, enabling it to withstand the humid environment of underground distribution rooms in high-rise buildings. Its intelligent features allow for remote operation and maintenance, reducing the frequency of manual inspections.
Can the equipment be adapted to meet the high-voltage grid connection requirements of new energy projects such as photovoltaic and wind power?
Fully compatible, it can be customized with anti-islanding protection and harmonic suppression linkage functions, and can stably accommodate the fluctuating load of new energy generation. Additionally, it features high-voltage insulation redundancy, effectively resisting voltage surges during the grid connection of new energy, and ensuring the power quality of the distribution network after grid connection.
Related Applications
Extra-large industrial enterprises: such as large steel plants, non-ferrous metal smelting plants, heavy machinery plants, etc., have extremely high production loads and strong continuous production demands. The 12kV distribution network is their core power supply hub. This equipment can serve as the main control core of the enterprise’s distribution network, enabling high-voltage power access, multi-circuit load distribution, and rapid fault removal. The intelligent linkage function can be integrated with the enterprise’s production scheduling system to match changes in production loads in real time, avoiding production interruptions caused by power outages and ensuring efficient operation of the enterprise.
High-end new energy power stations: Such as large-scale centralized photovoltaic power stations, step-up stations for offshore wind farms, and on-site distribution networks, often adopt a 12kV voltage level to achieve power collection and grid connection. This equipment possesses the characteristic of adapting to fluctuations in new energy generation, and can be linked with the grid dispatching system to achieve precise regulation of power generation. The compact design can accommodate the installation needs of outdoor open areas and offshore platforms in power stations. The wind and sand resistance, rain and snow resistance structure ensures stable operation of the equipment under extreme weather conditions, facilitating efficient transmission of new energy power.
Urban core hub distribution network: In core areas such as urban CBDs, transportation hubs, and provincial power dispatch centers, there is an extremely high load density, limited distribution space, and stringent requirements for power supply reliability. This equipment can be installed in underground distribution rooms in core areas to achieve loop network interconnection and intelligent regulation of 12kV main lines, quickly handle line faults, and ensure continuous power supply to important places such as office buildings, subways, and airports. At the same time, its deep intelligent functions facilitate the digitalization and unmanned operation and maintenance upgrade of urban distribution networks.
