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XGN40.5
XGN40.5 Air Insulated Switchgear
The 40.5kV air insulated ring main unit is the core equipment at the end of the ultra-high voltage distribution network, suitable for the 40.5kV distribution network system of domestic ultra-high voltage distribution networks, large energy storage bases, deep-sea wind power, and overseas ultra-high voltage industrial projects. It uses dry air as the insulation medium, integrates core technologies such as ultra-high voltage ultimate performance, extreme environment global tolerance, intelligent safety closed-loop, and large capacity integration, and has functions such as ultra-high voltage main line power supply, new energy energy energy collection, rapid fault removal, and cross system linkage. Equipment is a key hub for extending ultra-high voltage distribution networks to terminal loads, balancing extreme performance and environmental characteristics, and adapting to various complex ultra-high voltage scenarios.
Features
1.Ultra high voltage ultimate performance:
The insulation structure has been optimized through ultra-high voltage withstand testing, with a rated current of 4000-5000A and a maximum short-circuit breaking current of 50kA. It can adapt to the high load and high current transmission requirements of ultra-high voltage distribution networks, and has excellent stability in extreme operation.
2.Extreme environmental tolerance:
It can withstand extreme environments such as -60 ℃~+75 ℃ temperature difference, high altitude (above 6000m), strong salt spray (deep sea area), strong sand and dust, etc. The protection level reaches IP67, and it has strengthened design for deep sea anti-corrosion, typhoon resistance, earthquake resistance, etc.
3.Intelligent security closed-loop:
Built in full parameter online monitoring, fault warning, automatic isolation system, supporting deep linkage with ultra-high voltage dispatch platform and security system, achieving precise fault location, remote maintenance guidance, and sufficient safety redundancy.
4.Large capacity integrated design:
Adopting a compact integrated structure, it can integrate multiple functions such as load switches, circuit breakers, metering, and measurement and control. The cabinet volume is reduced by 65% compared to traditional equipment of the same voltage level, making it suitable for space limited scenarios in ultra-high voltage distribution rooms.
Execution standards: GB/T 3906-2020, IEC 62271-201; Rated current: 4000A-5000A; Short circuit breaking current: 40kA-50kA; Protection level: IP67 (universal type); Installation methods: indoor ultra-high voltage distribution room, outdoor high-altitude installation, deep-sea wind power platform installation; Optional configurations: deep-sea anti-corrosion kit, intelligent energy storage linkage module, earthquake protection device.
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Specification
| No. | Name | Unit | Value |
| 1 | Rated Voltage | kV | 40.5 |
| 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
How to deal with seawater corrosion when using 40.5kV air insulated ring main unit on deep-sea wind power platforms?
Equipped with a deep-sea specific anti-corrosion kit, the cabinet is made of titanium alloy material and treated with multi-layer ceramic coating. Key interfaces are equipped with waterproof sealing modules, which can resist corrosion from seawater and marine atmosphere, and have a service life of over 25 years.
Will the short-circuit breaking current of the device reach 50kA and affect the operation of surrounding equipment?
No, the device is equipped with an efficient arc extinguishing system and fault isolation module, which can quickly cut off the fault section when disconnecting the fault current, while weakening the impact of current shock on surrounding equipment, ensuring the overall stability of the distribution network.
Related Applications
Ultra high voltage distribution network terminal project: In the domestic ultra high voltage distribution network terminal extension project, equipment can serve as the core hub to achieve the connection between the ultra-high voltage main line and the regional distribution network. The ultra-high voltage ultimate performance is adapted to the high current transmission needs of ultra-high voltage. The intelligent safety closed-loop function is linked with the ultra-high voltage dispatch platform to quickly handle line faults, ensure the accurate transmission of ultra-high voltage power to terminal loads, and help expand the coverage of ultra-high voltage distribution network.
Large scale deep-sea wind power projects: The on-site ultra-high voltage distribution network of deep-sea wind farms often adopts a voltage level of 40.5kV. The equipment is designed for deep-sea anti-corrosion and typhoon resistance, and can be installed in the distribution room of offshore wind power platforms to resist seawater corrosion and strong typhoon impact. The large capacity integrated design adapts to the limited space of the platform, and can collect the electricity generated by multiple deep-sea wind turbines to stably transmit to the land power grid. At the same time, the intelligent monitoring function realizes remote operation and maintenance, reducing the frequency of offshore inspections.
Ultra large metallurgical base: The high-voltage distribution network of ultra large metallurgical bases (such as large steel plants and non-ferrous metal smelters) adopts a voltage level of 40.5kV, and the equipment can serve as the core control equipment of the base’s high-voltage distribution network. The ultra large capacity current capacity can meet the ultra-high voltage power supply needs of large equipment such as metallurgical furnaces and rolling mills. The extreme environmental tolerance performance is suitable for high-temperature and dusty environments in metallurgical bases, and the quick fault removal function avoids production interruption caused by power outages, ensuring the continuous and efficient operation of metallurgical production.
