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XGN33
XGN33 Air Insulated Switchgear
The 33kV air insulated ring main unit is a mainstream high-voltage distribution network equipment overseas, suitable for 33kV distribution network systems in some countries in Europe, Africa, and Southeast Asia, and can also meet the high-voltage power supply needs of large-scale energy bases and ultra-high voltage supporting extension projects in China. The equipment uses air as the insulating medium, integrates core technologies such as international multi standard compatibility, ultra-high voltage and high power carrying, and all-weather tolerance. It has functions such as high-voltage main line power supply, rapid fault removal, and new energy grid connection. It can operate stably in extreme environments such as high temperature, high salt spray, and high altitude. It is the preferred equipment for overseas high-voltage projects and domestic large-scale energy projects.
Features
1.International multi standard compatibility:
Accurately adapting to international mainstream standards such as IEC, BS, EN, etc., switchable 50Hz/60Hz grid frequency, supporting full dimensional customization of electrical interfaces and operation interfaces, providing multilingual control panels and localized certification documents, adapting to project acceptance requirements in different countries.
2.Ultra high voltage and high-power carrying capacity:
The rated current can reach 4000A, and the short-circuit breaking current can reach up to 40kA. It has excellent overload and impact resistance, and can adapt to the high-power power supply needs of large industrial equipment and new energy power stations, reducing the number of parallel devices.
3.Full climate and global adaptation:
The cabinet is made of corrosion-resistant and high-temperature resistant alloy material, which has been treated with multi-layer fluorocarbon spraying. It can withstand temperature differences of -50 ℃~+70 ℃, high altitude (above 5500m), strong salt spray and strong sand and dust environment, with a protection level of IP65.
4.Explosion proof safety redundancy:
adopting explosion-proof cabinet structure, arc protection system and fault relief device, it can adapt to Zone 1 explosion-proof area, and has fire retardant characteristics, suitable for overseas high-risk industrial scenes and energy base safety requirements.
Execution standards: IEC 62271-201, BS 1477, EN 50027, GB/T 3906-2020; Rated current: 2500A-4000A; Short circuit breaking current: 31.5kA-40kA; Protection level: IP65 (universal type); Installation methods: outdoor anti-corrosion installation, container integrated installation, fixed installation in explosion-proof areas; Optional configurations: localized authentication module, multilingual control system, desert/coastal dedicated protection kit.
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Specification
| No. | Name | Unit | Value |
| 1 | Rated Voltage | kV | 33 |
| 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 adapt the 33kV ring main unit to the grid frequencies of different countries in overseas projects?
The core components and measurement and control system support seamless switching between 50Hz/60Hz frequencies, while optimizing electrical structure and insulation parameters to ensure stable operation and insulation performance at different frequencies without the need to replace core components.
Does the equipment need special modification for use in areas with a high altitude of 5500m?
No additional modification is required. The equipment has a built-in high-altitude insulation optimization module. By adjusting the insulation spacing and composite insulation materials, the impact of high-altitude and low-pressure on insulation performance can be offset, and stable operation can be achieved directly.
Related Applications
High voltage distribution network in European cities: Some European countries (such as the United Kingdom and France) adopt the 33kV standard for urban high-voltage distribution network, and the equipment can adapt to EN, BS standards and local environmental policies. The full climate tolerance performance can cope with the changing climate in Europe, and the compact design adapts to the limited space of urban underground distribution rooms. The intelligent scheduling function is integrated with the municipal distribution network automation system to achieve precise control and rapid fault handling of high-voltage distribution network, ensuring stable power supply in the core areas of the city.
Large scale oil and gas field projects in Africa: Many large oil and gas fields in Africa use 33kV high-voltage distribution networks and are located in high temperature, high salt spray (coastal oil and gas fields) or strong sand and dust (desert oil and gas fields) environments. The equipment is designed to be corrosion-resistant, dustproof, and explosion-proof, and can be installed in high-risk areas of oil and gas fields. The explosion-proof and arc light protection system prevents internal failures from causing safety accidents, and is linked with the oil and gas field security system. When dangerous gases exceed the standard, the power supply is automatically cut off to ensure the safety of high-voltage power supply in oil and gas extraction, storage and transportation.
Domestic wind power bases with a capacity of tens of millions of kilowatts: The high-voltage distribution network of wind power bases with a capacity of tens of millions of kilowatts in western China often adopts a voltage level of 33kV. The equipment can withstand high-altitude, low-temperature, and strong wind environments, and the ultra-high voltage and high-power carrying capacity can collect the electricity generated by multiple wind turbines. It can be linked with the grid scheduling system to achieve precise control of power generation, with a protection level of IP65, to resist wind, sand, rain, and snow erosion, and ensure stable transmission of wind power to the main network.
