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XGN24
XGN24 Air Insulated Switchgear
The 24kV air-insulated ring main unit is a terminal hub equipment for high-voltage distribution networks. It is suitable for the 24kV distribution systems of high-voltage distribution networks in western China, large-scale new energy bases, and overseas high-end industrial projects. Using dry air as the insulating medium, it integrates core technologies such as ultra-high voltage insulation enhancement, high-capacity current flow, extreme environment tolerance, and intelligent operation and maintenance closed-loop. It possesses functions such as high-voltage main line power supply, new energy power collection, and precise fault removal. The equipment combines ultra-high voltage performance with environmental protection characteristics, serving as a core adaptive device for the extension of high-voltage distribution networks to ultra-high voltage.
Features
1.Ultra-high voltage insulation enhancement:
By utilizing composite insulation materials and a multi-layer insulation structure, the insulation withstand voltage reaches 1.2 times the standard value, effectively resisting arcing and corona phenomena under 24kV ultra-high voltage conditions, significantly enhancing operational safety.
2.Ultra-large capacity current-carrying design:
With a rated current up to 4000A and a short-circuit breaking current of up to 40kA, it can accommodate the ultra-high load power supply requirements of large-scale new energy bases and super-large industrial enterprises, reducing the number of parallel devices required.
3.Universal adaptability in extreme environments:
It can withstand temperature differences ranging from -50℃ to +65℃, high altitudes (above 5000m), severe thunderstorms, and other extreme conditions. With a protection level of IP65, it is suitable for complex working conditions in western plateaus and remote overseas areas.
4.Intelligent operation and maintenance closed loop:
It supports full lifecycle condition monitoring, fault warning, and remote maintenance guidance. It can be integrated with intelligent operation and maintenance platforms to achieve visualization of equipment operation data, significantly reducing the difficulty and cost of operation and maintenance for ultra-high voltage equipment.
Execution standards: GB/T 3906-2020, IEC 62271-201; Rated current: 2500A-4000A; Short-circuit breaking current: 31.5kA-40kA; Protection level: IP65 (general purpose); Installation methods: outdoor high-altitude installation, integrated installation in new energy base, indoor ultra-high voltage distribution room installation; Optional configurations: high-altitude insulation optimization module, lightning protection module, intelligent operation and maintenance terminal.
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Specification
| No. | Name | Unit | Value |
| 1 | Rated Voltage | kV | 24 |
| 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 | 50/60 |
| 13 | Lightning Impulse Withstand Voltage (Peak) – Phase-to-Phase & Phase-to-Earth / Isolation Break | kV | 125/145 |
| 14 | 1min Power Frequency Withstand Voltage of Secondary Circuit | kV | 2 |
| 15 | Protection Class | IP3X |
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FAQs
Will the insulation performance of the 24kV air insulated ring main unit be affected when used in an altitude area of 5000m?
No, equipped with a high-altitude insulation optimization module, by adjusting the insulation spacing and materials, the impact of high-altitude and low-pressure on insulation performance can be offset, ensuring stable operation of the equipment.
Can the intelligent operation and maintenance function of the device achieve remote fault location?
Yes, it has a built-in fault location and recording module that can accurately locate the fault section and type, upload them in real-time to the intelligent operation and maintenance platform, and provide remote maintenance guidance to shorten the fault handling time.
Related Applications
High voltage distribution network in the western plateau of China: The western plateau region has high altitude, low temperature, frequent thunderstorm weather, and some use 24kV high-voltage distribution network. The equipment can withstand high altitude and low temperature environments, and the lightning protection module can resist strong thunderstorm impacts. The intelligent operation and maintenance function can reduce the difficulty of manual inspection in the plateau area, achieve stable power supply for the plateau distribution network, and ensure the power transmission of local residents’ lives and photovoltaic and wind power projects.
Large scale offshore wind farms: The high-voltage distribution network inside the offshore wind farm needs to be adapted to high humidity, high salt spray, and strong typhoon environments. The 24kV ring main unit is designed to be corrosion-resistant and typhoon resistant, and can be installed in the distribution room of the offshore wind power platform. The ultra large capacity current capacity can collect the electricity generated by multiple wind turbines. The intelligent monitoring function can provide real-time feedback on the equipment operation status, and cooperate with the offshore operation and maintenance platform to achieve remote control, ensuring the stable transmission of wind power to the land power grid.
Overseas high-end chemical and metallurgical projects: Overseas high-end chemical and metallurgical enterprises have extremely high loads, and some use 24kV high-voltage distribution networks. The equipment’s ultra large capacity current capacity can meet the high-voltage power supply needs of large equipment in enterprises. The extreme environmental tolerance characteristics can adapt to complex production conditions of enterprises. The intelligent operation and maintenance closed-loop can reduce the operation and maintenance costs of overseas projects. At the same time, the environmental protection characteristics meet the environmental protection requirements of international high-end projects, and help enterprises achieve efficient and safe production.
