SF6-Gas-Insulated C-GIS
UN3-40.5/1250-31.5kA gas-insulated switchgear is designed and manufactured in accordance with GB and IEC standards. It features a fully insulated and fully sealed structure, making it suitable for harsh environments such as those characterized by pollution, salt spray, humidity, and high altitudes. Multiple configurations are available to meet even more demanding requirements.
Applied to
· 40.5kV voltage-rated offshore and onshore wind power step-up substations
· 40.5kV Voltage-Grade Onshore and Offshore Photovoltaic Power Generation Step-Up Substations
· 40.5kV Voltage-Grade Energy Storage Step-Up Substation
· 40.5kV voltage-level distribution substation step-down station
Classification
Product Center
▎Product Features
(1) Safety
· The switchgear is equipped with comprehensive mechanical interlocking and electrical interlocking functions.
The enclosure and cable compartment design meets the 20 kA/1s arc-fault requirement.
· The enclosure has good grounding continuity.
(2) Reliable
· The stainless steel gas tank boasts an IP67 protection rating and requires no refilling or maintenance throughout its service life.
· The air box design strength meets the requirements for altitudes of 5,000 m and below.
· The operating mechanism meets the 720-hour salt spray test requirement.
(3) Anti-fouling and moisture-proof
· Suitable for operation in environments with industrial pollution, salt content, and high humidity.
· Corrosion protection rating for switchgear: Onshore—C4; Offshore—C4H
· All connections between secondary components use moisture-proof, damp-proof, and mold-resistant connectors.
(3) Smart Management
· Provide intelligent solutions to facilitate digital upgrades.
· Provides online monitoring functions for selectable switch states, mechanical characteristics, vacuum status, temperature, and partial discharge.
· Supports remote operation, monitoring, and management
· The installation and user manual can be obtained via a QR code.
▎Operating Environment Conditions
Altitude: <5000m (When the operating altitude of the equipment exceeds 2000m, this must be specifically noted);
Ambient temperature: Maximum temperature +50℃, minimum temperature -50℃, average value within 24 hours ≤35℃;
Environmental humidity: Average relative humidity over 24 hours <95%; monthly average relative humidity ≤90%.
Electromagnetic interference: The amplitude of electromagnetic interference induced in the secondary system ≤ 1.6 kV;
Installation environment: The surrounding air contains no explosive or corrosive gases, and the installation location is free from frequent, severe vibrations or shocks.
Note: If the operating environment conditions exceed those specified above, please consult our company to discuss custom solutions.
▎Applicable Standards
IEC62271-1:2017 and GB/T11022-2020—Common Technical Requirements for High-Voltage Switchgear and Control Equipment
IEC62271-200:2011 and GB/T3906-2020 3.6kV~40.5kV AC metal-enclosed switchgear and control equipment
IEC62271-100:2017 and GB/T1984-2014 AC High-Voltage Circuit Breakers
IEC62271-105:2021 and GB/T16926-2009 AC High-Voltage Load Break Switch-Fuse Combination Apparatus
IEC 16271-102:2001 + A1:2011 and GB/T 1985-2014 High-voltage AC isolating switches 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~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 Standards of High-Voltage Switchgear and Control Equipment
▎Recycling and Reuse
Qian Gu Electric is committed to environmental protection. Its products are certified under the ISO 14001 international environmental management system and strictly adhere to this standard.
Recycling and Disposal
The design and manufacture of UN3 series switchgear comply with the requirements of 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 manufacturing and does not use SF6 gas during installation.
The product is made from reusable materials.
Provide self-powered relays and devices to avoid additional energy consumption.
▎ Function Description
1. Side-mounted main busbar: Rated current meets 1250A and 2500A.
2. Independent busbar room: Meets the requirements for either a single gas-insulated switchgear (GIS) bay or a double GIS bay.
3. Three-position isolating switch and mechanism: can be operated manually or electrically.
4. Circuit Breaker and Mechanism: The circuit breaker is equipped with a spring-operated 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 cable + surge arrester or 2 sets of cable + 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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