YSR6-12/24/40.5 series of SF6 Gas Insulated Metal Enclosed Switchgear (c-GlS) is independently developed by our company with sulfur hexafluoride gas as the insulating medium and can be applied in primary or secondary power distribution at a same time. lt is a new-generation medium-voltage whole-set switchgear with vacuum arc extinguishing technology, APG solid sealed technology, gas insulation technology and interface insulation technology. The product has passed the type test verification and new product technology appraisal by China’s national authoritative testing institution, The product can be widely used in various important power distribution and substation systems of China’s national economy, such as power distribution and substation network, urban power supply network, large industrial and mining enterprises, petrochemical, metallurgy, urban rail transit and so on.
The product has a modular design and can be combined according to various design schemes. The product has a sealed pressure system and all high-voltage live parts of its main circuit are sealed in the stainless steel gas tank without influence from environments. It runs reliably, is compact with little space occupied and free from maintenance.
Item Unit Parameter Rated voltage kV 12 24 40.5 Rated frequency Hz 50 Rated current A 630/1250/2500/3150/4000/630/1250/2500 Power frequency withstand voltage (phase-to-phase and phase-to-ground) kV 42 65 95 Power frequency withstand voltage (insulation breaking) kV 48 79 118 Lightning impulse withstand voltage (phase-to-phase and phase-to-ground) kV 75 125 185 Lightning impulse withstand voltage (insulation breaking) kV 85 145 215 Rated power frequency withstand voltage of auxiliary circuit kV 2 Rated instantaneous withstand current kA 25/31.5/40 Rated short-circuit period s 3 Rated peak withstand current kA 63/80/100 63/80/100 50/63/80 Rated short-circuit breaking current of circuit breaker kA 25/31.5/40 25/31.5/40 25/31.5 Rated short-circuit closing current of circuit breaker (peak) kA 63/80/100 63/80/100 50/63/80 Rated cable charge breaking current A 25 Rated operating sequence O-0.3s-CO-3min-CO Insulation gas SF6 Mechanical life Time 10000 Three-position switch Time 5000 Rated charge pressure (abs, 20°C) Mpa 0.14 Minimum charge pressure (abs, 20°C) Mpa 0.12 Sealed enclosure Grade IP67 Switch shell Grade UP4X Annual relative leak rate of dry air %/year ≤0.1 Rated power voltage of auxiliary circuit V DC48/110/220 AC220
The SF6 gas insulated switchgear (GIS) is an advanced, compact, metal-enclosed electrical distribution solution designed for high and medium voltage applications. Its IEC certification ensures compliance with international safety and quality standards, making it a reliable choice for indoor and outdoor substations. With a compact design, durable construction, and efficient operation, this switchgear cabinet is suitable for modern Power Systems requiring space optimization, safety, and long-term reliability.
In this detailed guide, we cover applications, after-sales service, common issues, and daily maintenance of the SF6 GIS, providing a complete reference for operators, engineers, and procurement professionals.
Overview of SF6 Gas Insulated Switchgear
Technical Specifications
Applications and Suitable Environments
Installation and Commissioning Guidelines
Daily Maintenance and Inspection
Common Issues and Troubleshooting
After-Sales Service and Support
Safety Considerations
Advantages of Compact Metal-Enclosed Design
Certifications and Compliance
Conclusion
The SF6 Gas Insulated Switchgear (GIS) is a key component in modern power systems, offering high reliability, compact design, and low maintenance. Its main features include:
SF6 Gas Insulation: Provides excellent dielectric properties and arc-quenching performance.
Metal-Enclosed Structure: Enhances mechanical protection and reduces risk of electrical accidents.
Compact Design: Ideal for installations with limited space, such as urban substations or indoor industrial facilities.
IEC Certification: Ensures compliance with international standards for safety and performance.
Indoor and Outdoor Use: Flexible for various environmental conditions.
The following table summarizes the key technical parameters of the SF6 GIS:
| Parameter | Specification |
|---|---|
| Rated Voltage | 12kV – 72.5kV |
| Rated Current | 630A – 2500A |
| Short-Circuit Breaking Capacity | 20kA – 40kA |
| Insulation Medium | SF6 Gas |
| Enclosure Type | Metal-Enclosed |
| Installation Environment | Indoor / Outdoor |
| Operating Frequency | 50Hz / 60Hz |
| Mechanical Endurance | ≥10,000 operations |
| Electrical Endurance | ≥2,000 operations |
| Ambient Temperature Range | -40°C to +50°C |
| Protection Class | IP54 / IP65 |
This specification ensures reliable performance in demanding applications, from urban substations to industrial power distribution.
SF6 GIS is widely deployed in:
Substations: Medium and high-voltage substations for electricity transmission and distribution.
Industrial Facilities: Factories, manufacturing plants, and chemical plants requiring reliable power protection.
Urban Power Grids: Compact design is ideal for high-density areas with limited space.
Renewable Energy Plants: Wind, solar, and hydroelectric plants for efficient distribution.
Railway Electrification Systems: Provides stable and safe electrical supply for traction power.
Indoor vs Outdoor Use:
Indoor GIS: Installed in controlled environments, reduces exposure to weather, dust, and pollution.
Outdoor GIS: Designed with enhanced insulation and corrosion-resistant enclosures to withstand harsh weather conditions.
Before installation, ensure:
A level and stable foundation with proper grounding.
Adequate clearance for operation, inspection, and maintenance.
Environmental conditions meet the specified temperature and humidity ranges.
Positioning the Cabinet: Place the metal-enclosed switchgear according to layout drawings.
Electrical Connections: Connect incoming and outgoing cables securely to the designated terminals.
SF6 Gas Filling: Confirm the gas pressure is within the recommended range.
Mechanical Alignment: Ensure all moving parts operate smoothly without obstruction.
Insulation Resistance Test: Verify insulation quality before energization.
Functional Test: Check opening and closing operations under no-load conditions.
Protective Relay Coordination: Confirm compatibility with upstream and downstream protection devices.
Regular maintenance ensures long-term reliability and safety. Recommended routine inspections include:
| Maintenance Task | Frequency | Description |
|---|---|---|
| SF6 Gas Pressure Check | Monthly | Ensure pressure is within the recommended range |
| Visual Inspection of Enclosure | Monthly | Check for corrosion, damage, or loose components |
| Mechanical Operation Test | Quarterly | Test opening and closing of breaker mechanism |
| Cleaning of Insulators and Panels | Bi-Annually | Remove dust, dirt, and debris |
| Lubrication of Moving Parts | Annually | Apply manufacturer-recommended lubricants |
| Electrical Contact Inspection | Annually | Check for pitting, erosion, or loose contacts |
Note: Proper maintenance reduces downtime, extends equipment lifespan, and prevents accidents.
| Issue | Possible Cause | Recommended Action |
|---|---|---|
| Breaker fails to close | Mechanical obstruction | Inspect and clear mechanism |
| SF6 gas pressure drop | Gas leakage | Repair leak and refill SF6 |
| Unstable electrical operation | Faulty contacts or wiring | Replace contacts, check connections |
| Excessive noise | Loose mechanical components | Tighten and lubricate components |
| Incorrect status indication | Faulty control or indicator | Recalibrate or replace indicator |
Understanding and addressing these issues promptly ensures continuous and Safe Operation.
Reliable after-sales support is crucial for SF6 GIS users. Services include:
Technical Consultation: Guidance on installation, operation, and system integration.
Maintenance Support: Regular inspections and preventive maintenance programs.
Spare Parts Supply: Availability of original components for repair and replacement.
Remote Assistance: Troubleshooting support via phone, email, or video consultation.
Warranty Service: Manufacturer-provided warranty for defects and performance issues.
These services minimize downtime and optimize system performance.
SF6 GIS involves high-voltage electricity and pressurized gas, requiring strict safety measures:
Always de-energize equipment before inspection or maintenance.
Use PPE: insulated gloves, safety glasses, and protective clothing.
Avoid direct contact with SF6 gas; although non-toxic, it can displace oxygen.
Follow all local and international safety regulations and IEC standards.
Ensure proper grounding to prevent electrical hazards.
The compact metal-enclosed design offers:
Space Efficiency: Ideal for areas with limited room.
Enhanced Safety: Fully enclosed metal reduces risk of electrical shock.
Durability: Resistant to environmental corrosion, dust, and physical impact.
Ease of Installation: Modular construction allows faster deployment and expansion.
Low Maintenance: Reduced frequency of servicing compared to air-insulated switchgear.
The SF6 Gas Insulated Switchgear complies with international standards:
IEC 62271 Series: High-voltage switchgear and controlgear standards.
ISO 9001: Quality management and control.
CE Marking: Compliance with EU safety and environmental requirements.
RoHS Directive: Restriction of hazardous substances.
These certifications confirm safety, reliability, and environmental responsibility.
The SF6 Gas Insulated Switchgear Metal Enclosed High Voltage Medium Voltage Indoor Outdoor Compact Design IEC Certified Substation Electrical Distribution Cabinet is a state-of-the-art solution for modern power distribution. Its compact design, metal enclosure, and SF6 insulation ensure safe, reliable, and efficient operation in both indoor and outdoor environments.
With proper installation, daily maintenance, and professional after-sales support, this switchgear guarantees long-term performance, reduced downtime, and high safety standards. Suitable for substations, industrial facilities, renewable energy systems, and urban electrical networks, it is an ideal choice for reliable electrical distribution and protection.
Phone: +8613736779975
E-mail: sales@vcbbreaker.com
Address: 66 Punan Road, Yueqing Economic Development Zone, Zhejiang, China
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