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XGN6
XGN6 Air Insulated Switchgear
The 6kV air-insulated ring main unit (RMU) serves as the core distribution equipment in medium-voltage power distribution networks. It is suitable for mainstream 6kV voltage scenarios, such as urban distribution networks and industrial parks. Utilizing air as the insulating medium, it integrates core components like load switches, circuit breakers, and fuses, offering multiple functions including ring main power supply, sectional control, and fault clearance. The equipment balances stability and scalability, allowing for flexible configuration of electrical components according to specific scenarios. It not only meets the continuous power supply needs in densely populated areas but also adapts to the sectional operation and maintenance of complex distribution networks. As a result, it has become one of the mainstream choices for the construction and renovation of medium-voltage distribution networks.
Features
1. High reliability operation:
With optimized arc-extinguishing and insulation structures, it can withstand frequent operations and load fluctuations under a voltage level of 6kV, achieving an average mean time between failures (MTBF) of over 100,000 hours, significantly reducing the risk of power outages.
2. Flexible expansion capability:
Modular cabinet design supports the free combination of components such as load switches, circuit breakers, and metering units. It can be upgraded and configured according to users’ different needs, ranging from simple power distribution to intelligent measurement and control, adapting to the entire lifecycle of use.
3. Intelligent operation and maintenance adaptation:
A remote measurement and control interface is reserved, which can be integrated into the distribution network automation system to achieve intelligent functions such as switch status monitoring, fault location, and remote operation, thereby facilitating the digital transformation of the distribution network.
4. Excellent cost-performance ratio:
Compared to SF6 ring main units, there is no need to bear the cost of gas procurement and recycling. Additionally, with mature manufacturing and installation processes, the overall comprehensive cost is reduced by 25% to 30%. At the same time, it meets the high insulation requirements of medium-voltage distribution networks.
Implementation standards: GB/T 3906-2020, IEC 62271-201; Rated current: 1250A-2000A; Short-circuit breaking current: 25kA-31.5kA; Protection level: IP4X (IP55 for outdoor models); Installation methods: Indoor floor-mounted, outdoor prefabricated; Optional configurations: Smart metering module, online temperature and humidity monitoring, electric operating mechanism (with energy storage).
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Specification
| No. | Name | Unit | Value |
| 1 | Rated Voltage | kV | 6 |
| 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 | 20/23 |
| 13 | Lightning Impulse Withstand Voltage (Peak) – Phase-to-Phase & Phase-to-Earth / Isolation Break | kV | 40/46 |
| 14 | 1min Power Frequency Withstand Voltage of Secondary Circuit | kV | 2 |
| 15 | Protection Class | IP3X |
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FAQs
Which one is more suitable for urban distribution networks, 6kV air-insulated ring main units or SF6 ring main units?
Both types are compatible with urban distribution networks. The air insulation type offers greater environmental benefits, with no risk of gas leakage and simpler operation and maintenance, making it suitable for densely populated areas. The SF6 type has superior insulation performance but higher cost. The air insulation type is currently the preferred choice for environmental protection retrofits of urban distribution networks.
Can the equipment achieve automatic fault isolation?
After configuring the intelligent measurement and control module and the sectional circuit breaker, they can be connected to the distribution network automation system. When a line fault is detected, the system can automatically disconnect the faulty section and restore power supply to the non-faulty sections, thereby enhancing the reliability of power supply in the distribution network.
Related Applications
Urban residential area: Newly built residential areas in cities have dense loads and high requirements for power supply reliability and environmental friendliness. This equipment can serve as the core device for the residential distribution network, enabling 6kV incoming line ring network power supply. It monitors the distribution status in real time through intelligent modules, quickly handles line faults, and ensures continuous power supply to key equipment such as air conditioners and elevators for residents. At the same time, it poses no environmental hazards and is compatible with the layout of residential greening and supporting facilities.
General Industrial Park: For general industrial parks such as those for mechanical processing and electronic manufacturing, enterprises have diverse loads and high requirements for power supply stability. The equipment can achieve sectional control and ring network interconnection of the 6kV distribution network within the park. When a single line fails, it can quickly switch the power supply circuit to avoid widespread power outages in the park. At the same time, the modular design can accommodate the load expansion needs of new production lines added by enterprises, facilitating efficient production in the park.
Urban main road distribution network: Commercial outlets, street lamps, and traffic signal equipment on both sides of urban main roads require stable power supply. This equipment can be installed in small distribution rooms alongside the roads to achieve segmented power supply and fault isolation for the 6kV distribution network. Its intelligent functions can be integrated with the municipal distribution network automation system to remotely regulate and control the power supply status, reduce the frequency of manual inspections, and ensure the normal operation of public facilities on main roads.
