Transformer Dissolved Gas Analyzer
Transformer dissolved gas analyzer enables full-cycle, uninterrupted online monitoring of transformer insulating oil deterioration for power plants and substations. Using optical spectrum analysis, it captures absorption characteristics in specific spectral bands, detects key indicators in real time, and leverages intelligent algorithms for data analysis, diagnosis, and tiered early warnings. It accurately identifies oil aging, moisture absorption, and contamination, supports condition-based maintenance, prevents transformer failures, and contributes to smart grid operation upgrades.
Description
Details page content
I. Product Introduction
The SUN-IGuard-600 is an online fault diagnosis analyzer for dissolved gases in transformer oil, integrating control, measurement, and analysis. It detects seven key fault gases (H₂, CO, CO₂, CH₄, C₂H₆, C₂H₄, C₂H₂), with optional O₂ and moisture monitoring. Using forced oil circulation and a high-efficiency vacuum separator, extracted gases are analyzed by a chromatographic column sensor and converted into electrical signals. These are digitized by a 24-bit A/D converter and processed by a military-grade DSP for high reliability. Data transmission adopts RS-485 with Modbus protocol, featuring optical isolation and surge protection for strong noise immunity. The system completes a full analysis within one hour and supports 1:N communication (N ≤ 32) for centralized data processing. Designed for five-year maintenance-free operation, the analyzer can be installed on energized transformers via simple flange connections, minimizing grid impact.
II. Model Explanation
III. Product Details/Advantages
1.High-Precision Spectral Detection – High-resolution spectral sensor with baseline correction effectively eliminates interference from oil impurities, ensuring minimal measurement error and industry-leading accuracy.
2.Real-Time Online Monitoring – Eliminates manual sampling and lab testing; achieves second-level data acquisition and minute-level analysis for dynamic oil condition tracking, overcoming the latency of traditional offline methods.
3.Intelligent Diagnostics – Built-in oil deterioration trend analysis model automatically identifies anomaly types and predicts degradation progress, providing scientific and precise decision support for maintenance.
4.Efficient Operations – Supports real-time data transmission, remote management, and historical data traceability; complies with DL/T860 standard and seamlessly integrates with existing O&M platforms, streamlining control processes.
IV. Testing Indicators
|
Name |
Measurement Range (uL/L) |
Detection Accuracy |
|
Hydrogen (H2) |
1-2000 |
± 10% or 1 µ l/l, whichever is greater |
|
Carbon monoxide (CO) |
5-5000 |
± 10% or 5 µ l/l, whichever is greater |
|
Carbon dioxide (CO2) |
20-50000 |
± 10% or 20 µ l/l, whichever is greater |
|
Methane (CH4) |
1-2000 |
± 10% or 1 µ l/l, whichever is greater |
|
ethane (C2H6) |
0.1-2000 |
± 10% or 0.1 µ l/l, whichever is greater |
|
Ethylene (C2H4) |
0.1-2000 |
± 10% or 0.1 µ l/l, whichever is greater |
|
Acetylene (C2H2) |
0.1-500 |
± 10% or 0.1 µ l/l, whichever is greater |
|
Oxygen (O2) |
50~50000 |
± 10% or 100 µ l/l, whichever is greater |
|
Moisture |
0~100 |
±20% |
V. Scope of Supply
- SUN-IGuard-600 Transformer Dissolved Gas Analyzer: 1 unit;
- SUN-IGuard-600 Transformer Dissolved Gas Analyzer Software: 1 set;
- Intelligent Controller: 1 unit;
- PK Screen: 1 unit (optional);
- Communication Cable: 1 set;
- Dedicated Matching Oil Pipes and Valves: 2 sets.
VI. Optional Customization Solutions
We offer a range of gas monitoring devices tailored to customer needs, from single-gas (e.g. H₂ or C₂H₂) to multi-gas configurations. Our highest model detects 7 gases plus trace moisture, oxygen, and nitrogen. Differences between models are mainly reflected in the number of gases displayed and recorded on the web interface. All other aspects-including working principle, installation, standard components, and software operation-remain consistent across configurations.
VII. Quality
The SUN-IGuard-600 Transformer Dissolved Gas Analyzer delivers high-precision ppb-level monitoring and maintenance-free operation for up to five years.
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
At the Bugumaxi Potash Mine, we installed an online monitoring system for the main transformer, integrating four key parameters: dissolved gases in oil, core current, partial discharge, and fiber-optic winding temperature. This established a comprehensive early-warning system covering the transformer's critical components: oil, core, insulation, and windings.
The system enabled a shift from routine inspections to condition-based maintenance, eliminating unexpected transformer failures and unplanned downtime. This has reduced annual production losses by over RMB 3 million and cut manual inspection costs by approximately 40%, ensuring continuous and safe mine operation.
IX. Application Scenarios
Covering all critical power nodes with high requirements for power supply reliability, production safety, and economic efficiency, it is an indispensable and important technical means in modern smart grids and condition-based maintenance systems.
1. Core hub substations
2. Self-owned substations of important factories and mines
3. Substations in remote locations or harsh environments
4. Underground substations or important user substations in urban power grids
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.
XI. Product usage tutorials, solutions, and technical problem notifications
Precautions for Operation and Maintenance Personnel
1. Routine Inspection,2. System Environment,3. Oil Valve Inspection
4. Carrier Gas Check,5. Indicator Lights,6. Data Server
[Click here to view the complete product manual & detailed instructions >]
XII. Packaging and Transportation
XIII. Factory Strength
1. Qualification Certificates
2. Innovative technologies/capabilities
3. Supply Chain Advantages
Independent R&D & Localized Sourcing
– Core sensors and components are developed in-house and sourced locally, ensuring supply chain security and efficiency.
Cost & Lead Time Reduction
– Localized production and sourcing significantly lower costs and shorten delivery times.
Customization Flexibility
– Greater agility in delivering tailored solutions to meet specific customer requirements.
Strict End-to-End Quality Control
– Rigorous quality management across the entire supply chain, from components to finished products.
Reliable Lifecycle Services
– Commitment to long-term customer value through maintenance, support, and consistent supply reliability.
4. Professional production equipment (CNC)
XIV. FAQ
Q1. What is transformer oil chromatography analysis?
A: Transformer oil chromatography analysis is similar to "blood testing" of transformers, diagnosing potential internal faults by accurately measuring the content of dissolved fault characteristic gases (such as H ₂, CH ₄, C ₂ H ₂, etc.) in the oil.
Q2. Why do we need to do oil chromatography analysis?
A: Realize early warning of faults, diagnose the nature and severity of faults, and provide a basis for condition-based maintenance
Q3. Which key gases are mainly detected? What do they represent?
A: It mainly detects 7 types of gases, often referred to as "fault characteristic gases":
H ₂: Low energy discharge or moisture
CH ₄, C ₂ H ₆, C ₂ H ₄: Oil overheating (C ₂ H ₄ indicates medium high temperature)
C ₂ H ₂: High energy discharge
CO, CO ₂: Solid insulation aging
Q4. How to determine the type of fault based on gas data?
A: Characteristic gas method: Based on the dominant gas, preliminarily determine the type of fault:
C ₂ H ₂ dominant → arc discharge; Mainly C ₂ H ₄ → high temperature overheating; Mainly CH ₄, C ₂ H ₆ → low temperature overheating; H ₂ significantly increases → partial discharge or moisture.
Three ratio method: By calculating the ratios of C ₂ H ₂/C ₂ H ₄, CH ₄/H ₂, and C ₂ H ₄/C ₂ H ₆, the fault type is determined according to standard coding.
Q5. Is it certain that the transformer is safe if the gas content is below the attention value?
A: The following factors need to be comprehensively evaluated:
Gas production rate: rapid growth is more dangerous than high content
Gas composition: containing trace amounts of C ₂ H ₂ may indicate discharge
Historical trend: Focus on whether the data continues to rise
Other tests: Comprehensive judgment based on electrical tests
Q6. The meaning of CO/CO ₂ increase.
A: Indicates that solid insulation materials may overheat or age, and if accompanied by the growth of hydrocarbon gases, the fault will be more severe.
Q7. What should be noted for monitoring oil color spectrum data of newly put into operation equipment?
A: At the initial stage of operation, baseline data should be established, with a focus on the trend of data changes, rather than whether a single value is lower than the attention value.
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