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XGN24
XGN30 Air Insulated Switchgear
The 30kV air insulated ring main unit is a transitional core equipment for ultra-high voltage distribution networks, suitable for cross regional distribution networks of 30kV voltage levels at home and abroad, large-scale energy hub interconnection lines, and high-end industrial projects overseas. It uses dry and clean air as the insulation medium, integrates core technologies such as ultra-high voltage insulation strengthening, cross network segment coordinated control, and lightweight integration. The equipment can achieve segmented regulation, precise fault isolation, and new energy energy collection functions for 30kV ultra-high voltage distribution networks, while balancing ultra-high voltage performance and on-site deployment flexibility. It is a key selection to fill the gap between 24kV and 35kV voltage levels and connect medium high voltage and ultra-high voltage distribution networks.
Features
1.Ultra high voltage insulation transition adaptation:
using composite insulation partitions and vacuum arc extinguishing technology, the insulation margin is increased by 25% compared to the standard, which can stably withstand the voltage transition between the 24kV end and the 35kV main line, and resist ultra-high voltage arc and corona interference.
2.Cross regional distribution network collaboration:
supports linkage with multi voltage level distribution network scheduling systems, with built-in network segment connection modules, which can achieve intelligent load transfer between 30kV and adjacent voltage level distribution networks, and adapt to cross city and cross regional distribution network interconnection scenarios.
3.Lightweight ultra-high voltage design:
Compared with traditional equipment of the same voltage level, it reduces weight by 35% and adopts a segmented assembly structure, which can adapt to on-site splicing in transportation restricted areas such as mountainous areas and plateaus, greatly reducing lifting and transportation costs.
4.Upgraded protection against strong thunderstorms:
Equipped with multi-level lightning absorption modules and overvoltage protection systems, it can withstand the impact of strong thunderstorms on ultra-high voltage lines, adapt to multi mine ultra-high voltage distribution networks, and reduce the fault tripping rate by 60% compared to conventional equipment.
Execution standards: GB/T 3906-2020, IEC 62271-201; Rated current: 2500A-4000A; Short circuit breaking current: 31.5kA-40kA; Protection level: IP54 (outdoor type IP65); Installation methods: indoor ultra-high voltage distribution room, outdoor high-altitude assembly, cross regional distribution network connection station; Optional configurations: lightning protection module, cross network linkage terminal, remote wireless measurement and control system.
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Specification
| No. | Name | Unit | Value |
| 1 | Rated Voltage | kV | 30 |
| 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 | 70/80 |
| 13 | Lightning Impulse Withstand Voltage (Peak) – Phase-to-Phase & Phase-to-Earth / Isolation Break | kV | 185/215 |
| 14 | 1min Power Frequency Withstand Voltage of Secondary Circuit | kV | 2 |
| 15 | Protection Class | IP3X |
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FAQs
Can the 30kV ring main unit and 35kV equipment share the distribution network dispatch system?
It can be connected through a dedicated adaptation module, and communication protocols and parameter thresholds need to be optimized to ensure cross voltage level data synchronization and precise execution of scheduling instructions, without the need to reconstruct the scheduling system.
Is it necessary to install additional lightning protection devices when using in areas with multiple lightning strikes?
No additional installation required, the device is equipped with multi-level lightning protection modules, which meet the lightning protection standards of ultra-high voltage distribution networks and can be directly adapted to mountainous and high-altitude multi minefield scenarios.
Related Applications
Cross regional distribution network connection line: In the 30kV distribution network connection project across cities and counties, equipment can serve as the core connection hub to achieve power supply and load scheduling between different regional distribution networks. Lightweight design adapts to the installation needs of connection stations located in remote mountainous areas, strong thunderstorm protection function resists extreme weather in the wild, ensures cross regional power supply continuity, and helps upgrade the reliability of distribution network power supply.
Overseas high-end mining projects: Some large overseas mines (such as mines in South America and Australia) adopt 30kV ultra-high voltage distribution networks, and the equipment can adapt to local voltage standards and harsh environments. The segmented assembly structure is convenient for transportation and installation in complex terrain of the mine. The ultra-high voltage bearing capacity can directly supply power to large mining equipment and beneficiation units, reducing losses in the voltage reduction process, and there is no SF6 gas hazard, which meets the environmental protection requirements of overseas high-end projects.
Supporting facilities for large energy storage power stations: The high-voltage side distribution network of large centralized energy storage power stations often adopts a voltage level of 30kV. The equipment can achieve high-voltage connection between the energy storage unit and the power grid. The cross network collaborative function can cooperate with the energy storage scheduling system to accurately respond to changes in power grid load, quickly switch charging and discharging modes, and have strong insulation performance to resist voltage fluctuations during the energy storage charging and discharging process, ensuring stable operation of the energy storage power station.
