SF6 Gas-Insulated Ring Main Unit Equipment
UN3-36, 40.5-1250-2500-3150A-31.5kA gas-insulated ring main unit, designed and manufactured in compliance with GB and IEC standards, features a fully insulated and fully sealed structure. It is suitable for harsh environments such as polluted areas, salt mist, high humidity, and high altitudes, and offers multiple configurations to meet even more demanding requirements.
Applied to
33. Boosting stations for offshore and onshore wind power generation operating at 33 kV and 35 kV voltage levels;
33. Boosting stations for offshore and onshore energy storage and photovoltaic systems operating at 33 kV and 35 kV voltage levels;
33. Transformer and distribution boosting or step-down stations operating at 33 kV and 35 kV voltage levels.
Classification
Product Center
▎Product Features
· This product is designed and manufactured in compliance with GB and IEC standards.
· Manufactured with a structural design featuring vacuum arc-extinguishing and all-insulated by SF6 gas;
· The enclosure’s protection rating reaches IP67, and during installation and throughout its service life, it requires no unscheduled inflation or re-inflation.
· The product meets requirements for altitudes of 5,000 meters and below;
· Suitable for operation in environments with industrial pollution, salt spray, and high humidity; meets C3 standards on land and C4 standards at sea.
▎Operating Environment Conditions
Altitude: ≤5000m (Special note required if the equipment is operated at an altitude exceeding 2000m);
Ambient temperature: Maximum temperature +50℃, minimum temperature -50℃, average value within 24 hours ≤35℃;
Environmental humidity: Average relative humidity over 24 hours ≤ 95%; average monthly relative humidity ≤ 90%.
Electromagnetic interference: The amplitude of electromagnetic interference induced in the secondary system ≤ 1.6 kV;
Installation environment: The surrounding air must be free of explosive and corrosive gases, and the installation location must be free of frequent, severe vibrations or impacts.
Note: If the operating environment conditions exceed those specified above, please consult our company to discuss custom solutions.
▎Applicable Standards
IEC 62271-1:2017 and GB/T 11022-2020—Common Technical Requirements for High-Voltage Switchgear and Control Equipment
IEC 62271-200:2011 and GB/T 3906-2020: 3.6 kV to 40.5 kV AC metal-enclosed switchgear and controlgear
IEC62271-100:2017 vs. GB/T1984-2014 — AC High-Voltage Circuit Breakers
IEC 62271-105:2021 and GB/T 16926-2009—AC High-Voltage Load Break Switch-Fuse Combination Apparatus
IEC 16271-102:2001+A1:2011 and GB/T1985-2014—High-voltage AC disconnectors and earthing switches
IEC60529 and GB/T4208-2017: Enclosure Protection Ratings (IP Codes)
GB/T11023-2018 — Test Method for Gas Sealing of Sulfur Hexafluoride in High-Voltage Switchgear; DL/T402-2016 — Technical Specifications for Ordering High-Voltage AC Circuit Breakers
DL/T486-2021 Technical Specifications for Ordering High-Voltage AC Disconnect Switches and Earthing Switches
DL/T403-2017 Technical Specifications for Ordering 12kV to 40.5kV High-Voltage Vacuum Circuit Breakers
. DL/T404-2018 3.6kV～40.5kV AC Metal-Enclosed Switchgear and Control Equipment; DL/T593-2016 Common Technical Requirements for High-Voltage Switchgear and Control Equipment
▎Recycling and Reuse
Qian Gu Electric is committed to environmental protection. Its products have obtained ISO 14001 international environmental management system certification and strictly adhere to this standard.
Recycling and Disposal
The UN3 series switchgear is designed and manufactured in compliance with the national standard GB/T 3906 and the international standard IEC 62271-200. At the end of the product’s lifecycle, SF6 gas will be recovered and reused in accordance with relevant standards.
Sustainable development
The UN3 series switchgear continuously reduces the use of SF6 during the manufacturing process and does not use SF6 gas during installation.
All products are made from 100% recyclable materials;
Provide self-powered relays and devices to avoid additional energy consumption.
▎Feature Description
1. Side-mounted main busbar: Rated current meets 1250A and 2500A.
2. Independent busbar room: Meets the requirements for single-cabinet or dual-cabinet configurations.
3. Three-position disconnector and mechanism: Can be operated manually or electrically.
4. Circuit Breaker and Mechanism: The circuit breaker is equipped with a spring mechanism and features automatic reclosing functionality. It can be manually or electrically energized.
5. Installation of cable accessories and surge arresters: C-type bushings—choose either 1 set of cables + surge arrester or 2 sets of cables + surge arrester.
6. Cable Room: Meets installation requirements for cables of various specifications.
7. Cable Room Pressure Relief Channel
8. Air box pressure relief channel
9. Circuit Breaker Room
10. Compartment bushing
11. Nameplate
12. Simulated busbar
13. Protective device
▎Technical Specifications
Environmentally Friendly Gas-Insulated Ring Main Unit Equipment
The UN0-12, 24/630-25kA environmentally friendly gas-insulated ring main unit is a fully sealed and fully insulated ring main unit that employs advanced vacuum interrupter technology. From the design perspective, it meets environmental requirements by being oil-free and SF6-free. All conductive parts inside the switchgear are housed in a sealed stainless steel enclosure, with dry air serving as the primary insulating medium within the enclosure. The main switch uses a vacuum arc-extinguishing system, while the isolating switch features a three-position structure. The enclosure boasts an IP67 protection rating, making it immune to the effects of condensation, frost, salt spray, pollution, corrosion, ultraviolet radiation, and other similar factors.
SF6 Gas-Insulated Ring Main Unit Equipment
UN3-12, 24-1250-2500-3150-31.5kA gas-insulated ring main units are designed and manufactured in compliance with GB and IEC standards. They feature a fully insulated, hermetically sealed structure and are suitable for harsh environments such as those characterized by pollution, salt spray, humidity, and high altitudes. A variety of configurations are available to meet even more demanding requirements. <br/> Applied to <br/> 10. Offshore and onshore wind power step-up substations for 20kV voltage grid integration <br/> 10. Offshore and onshore energy storage and photovoltaic step-up substations for 20kV voltage networks <br/> · 10, 20 kV voltage-level substations for power transmission and distribution, used for voltage boosting or reducing. <br/>
SF6 Gas-Insulated Ring Main Unit Equipment
The UN3-36, 40.5-630-25-31.5 kA series gas-insulated ring main units are designed and manufactured in compliance with GB and IEC standards. They feature a fully insulated, hermetically sealed structure and are suitable for harsh environments such as those characterized by pollution, salt spray, humidity, and high altitudes. A variety of configurations are available to meet even more demanding requirements. <br/> Applied to <br/> 33. 35kV voltage-rated box-type substations for offshore and onshore wind power generation; <br/> 33. Offshore and onshore energy storage systems and photovoltaic box-type substations for 35kV voltage networks; <br/> 33. Ring main units for substations and distribution networks operating at 35 kV.
Environmentally Friendly Gas-Insulated Ring Main Unit (Spare)
The UN0-12/630A-25kA environmentally friendly gas-insulated ring main unit is a fully sealed and fully insulated ring main unit that employs advanced vacuum interrupter technology. From the design perspective, it meets environmental requirements by being oil-free and SF6-free. All conductive parts inside the switchgear are housed in a sealed stainless steel enclosure, with dry air serving as the primary insulating medium within the enclosure. The main switch uses a vacuum arc-extinguishing system, while the isolating switch features a three-position structure. The enclosure boasts an IP67 protection rating, making it immune to the effects of condensation, frost, salt spray, pollution, corrosion, ultraviolet radiation, and other similar factors.
Contact Information
Headquarters: No. 518 Guanghua Road, Songjiang District, Shanghai
Production base: No.88 Hongyang Road，Kunshan City, Jiangsu Province
Telephone:18801089589
Website:www.qianguelectric.com
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