SF6 Gas Online Monitoring System
SF6 Gas Online Monitoring System is designed specifically for SF6 gas monitoring in GIS equipment, capable of real-time detection of gas temperature, pressure, density, micro water content, and dew point. SF6 Gas Online Monitoring System adopts a fully enclosed, waterproof, and dustproof structure, with strong electromagnetic interference resistance and easy installation, suitable for high-frequency electric field environments and outdoor working conditions. It can effectively eliminate the influence of temperature and pressure on micro water measurement values, ensure stable and reliable data, and provide key guarantees for the safe operation of power equipment.
Description
Details page content
I. A brief product introduction:
SF6 Gas Online Monitoring System integrates IoT, multi-sensor, big data, and AI to collect partial discharge, SF6 gas temperature, moisture, leakage, and mechanical characteristics. Enables comprehensive monitoring and fault diagnosis for both transient and latent faults in GIS switchgear. Supports precise maintenance and full lifecycle health management to reduce costs. Consists of intelligent sensors and an online diagnosis platform, expandable to cloud-edge-device architecture.
II. Model Explanation
III. Product Details/Advantages:
1. Comprehensive Condition Monitoring
Real-time monitoring of SF₆ gas, partial discharge, mechanical characteristics, conductor temperature, and other multi-dimensional parameters to accurately assess GIS health status.
2. Intelligent Warning & Diagnosis
Built-in fault diagnosis algorithm automatically identifies potential hazards and provides early warnings. Supports condition-based maintenance to improve operational efficiency.
3. Flexible & Reliable Configuration
Modular design supports both wired and wireless transmission. Compliant with power industry standards and adaptable to various GIS substation deployment needs.
4. High-Reliability Design
Core sensors and communication modules use industrial-grade components with a wide operating temperature range, ensuring long-term continuous and stable operation in harsh environments.
5. Seamless System Integration
Supports multiple standard protocols including IEC61850 and Modbus, enabling seamless integration with various master station systems and eliminating information silos.
IV. Product Parameters
No | Name | Micro Water Density Sensor | |
1 | temperature | -40～65℃ | ±0.5℃ |
2 | Pressure | 0～1.00MPa(abs.) | ±0.75％FS |
3 | Dew point | -50℃～+20℃ | ±2℃ |
4 | Trace water | 10～20,000 ppmv | ±4％FS |
5 | Sealing performance | Leakage rate ≤ 1 × 10-9Pa.m3/s (helium leak detection) | |
6 | Protection level | IP55 | |
7 | Communication interface | RS485(9.6Kbps) | |
8 | Power supply | DC12V | |
9 | Power consumption | 5W | |
V. Scope of Supply
No | Equipment Name | Specifications and models | Place of Origin |
1 | SF6 Gas Online Monitoring System | SUN-IGuard-401 | Zhejiang |
1.1 | Micro water monitoring sensor | Meet the measurement accuracy requirements | Installed on GIS density table |
1.2 | Microwater Monitoring IED | Route 9 | Installed in the on-site cabinet |
1.3 | Power Communication Cables and Installation Accessories | Control communication cable RVVP4 * 1.0 between sensors and IEDs |
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1.4 | Communication Cables and Installation Accessories | Cable RVVP3 * 0.5 between IED and electrical configuration cabinet |
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1.5 | Three-way connecting piece | Supporting with GIS manufacturers |
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1.6 | Other accessories | Metal hoses, O-rings, cable locking heads, bridge opening covers, etc |
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VI. Optional Customization Solutions
We offer tailored GIS online monitoring system design and upgrades based on your equipment conditions and monitoring needs. If deployment time allows and failures are not urgent, we can build a custom system covering core parameters, acquisition frequency, alarm thresholds, and communication protocols. Key components feature high-precision sensors and industrial-grade modules for accuracy and stability. The solution supports long-term operation across voltage levels and reduces long-term maintenance costs.
VII. Quality
Qualification association: We adhere strictly to globally recognized regulations and protocols, integrating environmental excellence and quality management throughout the product lifecycle.
VIII. Real-world cooperation cases
The 160MW photovoltaic project in Labrador, Philippines, has been completed and put into operation. The system enables 24-hour online monitoring of the SF6 gas moisture content and density in key equipment such as GIS and circuit breakers. By replacing traditional manual inspection with high-precision sensing and an intelligent platform, it can assess insulation strength and decomposition risk in real time, and provide early warnings for potential hazards such as leaks and abnormal humidity. This significantly improves the equipment's condition-based maintenance capabilities and operational reliability, providing effective data support for the safe and stable power supply of the power grid.
IX. Application Scenarios
Ultra-high / extra-high voltage grid nodes: GIS failures here can cause widespread blackouts, making online monitoring essential for reliability.
Urban core substations for critical loads: Monitoring prevents major economic and social losses from outages and is standard practice for key equipment.
Remote or harsh-environment substations: For mountainous, coastal, high-altitude, or high-temperature sites, online monitoring reduces costly manual inspections, lowers operational expenses, and minimizes human error.
Data source for condition-based maintenance: The system helps utilities shift from routine to predictive maintenance. Continuous moisture and density trend data enable health assessment, lifespan prediction, scientific maintenance scheduling, and prevention of unnecessary outages or over-maintenance.
X. Our Service
Our after-sales service and technical team solemnly promises
Pre-Sales Service
- Consultation & Guidance: 24/7 online support with expert engineers to clarify needs, recommend solutions, and advise on pricing and processes.
- On-Site Inspection: Engineers visit sites for precise measurements and environmental assessment, deliver detailed reports to support tailored system design.
After-Sales Service
- Year Warranty: Covers material/manufacturing defects as per contract.
- Dedicated Support: One-on-one follow-up from a specialized team for seamless assistance.
- Multi-Channel Help: Support via contacts, project teams, or website; fast global coordination for repairs or replacements during warranty.
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XI. Product usage tutorials, solutions, and technical problem notifications
1. Precautions:
Only professionally trained personnel may install or disassemble this device.
2. Packaging
The equipment is packaged in a hard cardboard box lined with PVC foam board. A certificate of conformity is included inside the box.
3. Transportation
The product, in its intact packaging, may be transported using general transportation vehicles. During transportation, the requirements of the printed markings should be followed.
4. Storage
During transportation, the product should be stored in an environment with a temperature of 0℃~40℃ and a relative humidity <95%, free from oily, corrosive gases and dust. The device probe should be fitted with a protective sleeve.
XII. Packaging and Transportation
XIII. Factory Strength
1. Qualification Certificates
2. Innovative technologies/capabilities
(1) High-tech enterprise certificate
3. Supply Chain Advantages
Rapid access to high-quality components and efficient system integration
Streamlined supply model that enhances production capacity and delivery speed
Quick response to customer needs, including timely technical support, spare parts supply, and customized services
Improved user operational and maintenance efficiency as a direct result of the above capabilities
4. Professional production equipment (CNC)
XIV. FAQ
Q1: What is GIS moisture monitoring?
A1: It measures and analyzes water vapor concentration in SF6 gas inside GIS equipment, expressed as a volume ratio (μL/L or ppmv).
Q2: Why control moisture in GIS strictly?
A2:Generates toxic byproducts: Under electrical arcs, SF6 and moisture produce corrosive substances (e.g., HF, H₂SO₄), damaging metal parts and insulation.
Compromises insulation: Moisture lowers SF6's dielectric strength; condensation at low temperatures raises flashover risks.
Q3: Moisture sources in GIS?
A3:Trace moisture in new SF6 gas.
Residual humidity from assembly or maintenance.
Moisture release from solid insulation during thermal cycles.
External humid air ingress due to seal aging.
Q4: Key precautions in measurement?
A4:Stabilize equipment (≥24 hours) for gas-solid-moisture equilibrium; convert readings to 20°C reference.
Ensure leak-free measurement ports; purge sampling lines thoroughly.
Calibrate dew-point sensors or online instruments regularly.
Q5: What if moisture levels exceed the standard?
A5:Verify instrument accuracy and repeat tests if needed.
Analyze trends: gradual rise suggests minor leaks/material outgassing; sharp increases indicate seal failure.
Perform leak checks and gas decomposition analysis.
Escalate monitoring and plan gas treatment or outage repairs based on severity.
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