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XGN6.6
XGN6.6 Air Insulated Switchgear
The 6.6kV air-insulated ring main unit is a specialized distribution equipment designed for special voltage level distribution networks, primarily suitable for 6.6kV voltage systems in mining, petrochemical, and some overseas projects. It utilizes dry air as the insulating medium and features resistance to harsh environments, high insulation strength, and strong specificity. The core of the equipment is used for power access, load distribution, and fault protection in 6.6kV distribution networks. It can be adapted to complex scenarios such as flammable and explosive environments, high humidity, and dusty conditions. Through customized structural design, it meets the stringent requirements of special industries for distribution equipment, filling the gap in the adaptation of conventional voltage level equipment in special scenarios.
Features
1. Customized adaptation for special voltage:
Precisely matching the 6.6kV voltage level system, with targeted optimization of electrical parameters, to avoid equipment damage or operational failures caused by voltage mismatch, and adapting to specialized distribution network scenarios.
2. Resistance to harsh environments:
The cabinet body adopts an enhanced design that is corrosion-resistant, dust-proof, and waterproof. The surface undergoes special coating treatment, allowing it to operate stably in high humidity, dusty, salt spray, flammable, and explosive environments. The protection level reaches above IP54.
3. Explosion-proof safety design:
The internal structure is optimized for high-risk scenarios, with components arranged in a flameproof partition design. Equipped with a fault pressure relief device, it can effectively prevent safety accidents caused by internal faults, ensuring the safety of on-site personnel and equipment.
4. Compatibility with overseas standards:
It can be adapted to international standards such as IEC and ANSI according to the needs of overseas projects, with customized adjustments to electrical interfaces and control methods to meet project specifications in different countries and regions.
Execution standards: GB/T 3906-2020, IEC 62271-201, ANSI C37.20.1; Rated current: 1250A-2500A; Short-circuit breaking current: 31.5kA-40kA; Protection level: IP54 (IP65 for high-risk scenarios); Installation method: Indoor explosion-proof installation, outdoor corrosion-resistant installation; Optional configurations: Explosion-proof operating mechanism, gas detection linkage module, intrinsically safe measurement and control unit.
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Specification
| No. | Name | Unit | Value |
| 1 | Rated Voltage | kV | 6.6 |
| 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
Can a 6.6kV ring main unit be used compatibly with a 6kV system?
They are not directly compatible due to differences in voltage levels, electrical parameters, and insulation standards. Direct mixing will lead to equipment insulation breakdown and frequent malfunctions. It is necessary to select corresponding equipment according to the actual voltage level.
When used in petrochemical scenarios, is additional explosion-proof treatment required?
The equipment itself is designed with explosion-proof features, optimized through flameproof and pressure relief structures, and can be directly used in Zone 2 explosion-proof areas without the need for additional explosion-proof enclosures, meeting the safety requirements of chemical industry scenarios.
Related Applications
Petrochemical Park: The petrochemical park is prone to high-risk factors such as flammable and explosive gases, as well as corrosive media, which necessitates extremely high standards for the explosion-proof and corrosion-resistant performance of power distribution equipment. This equipment, through its explosion-proof zoning and enhanced corrosion-resistant design, is suitable for the 6.6kV distribution network systems of refineries and chemical plants, ensuring safe power supply to production units and storage and transportation facilities. Additionally, it can be integrated with the park’s gas detection system, automatically cutting off power supply when excessive flammable and explosive gases are detected, thus preventing safety accidents.
Mining Scenario: Underground mines and their auxiliary facilities on the surface often operate in high humidity and dusty environments. Additionally, some mines utilize a dedicated 6.6kV distribution network for power supply. This equipment, featuring dustproof, waterproof, and impact-resistant properties, can be installed in the mine’s surface distribution room and underground chambers. It provides stable power supply for mining machinery, ventilation equipment, and drainage systems. Its modular structure facilitates installation and maintenance in the narrow spaces of mines, ensuring the continuous operation of mining activities.
Overseas industrial projects: The industrial distribution networks in some overseas countries and regions (such as some Southeast Asian and African countries) adopt a voltage level of 6.6 kV. This equipment can be adapted to international standards, with electrical interfaces, control methods, and protection standards customized according to project needs, meeting the power distribution requirements for overseas factories and infrastructure construction. Additionally, the air insulation design eliminates the need to consider international transportation and recycling restrictions for SF6 gas, reducing project implementation costs.
