What Is Furan Analysis?
Cellulose insulation degrades under thermal and electrical stress, forming furanic compounds that dissolve into the transformer oil. Measuring the concentration of these furans gives a direct indication of the Degree of Polymerization (DP) and insulation aging.
The key compound measured is 2-Furfuraldehyde (2-FAL), along with related furans such as 5-HMF, 2-FOL, and 2-ACF.
Test Standard
IEC 61198 – Mineral insulating oils – Methods for the determination of 2-furfural and related compounds
🎯 What We Measure
2-Furfuraldehyde (2-FAL)
5-Hydroxymethylfurfural (5-HMF)
2-Furyl Methyl Ketone (2-ACF)
2-Furyl Alcohol (2-FOL)
Furfural concentration in ppb (parts per billion)
Key Gases Measured
Insulating Liquids – Measurement of Relative Permittivity, Dissipation Factor (Tan δ) and DC Resistivity.
| 2-FAL Level (ppb) | Condition | Insulation Status |
|---|---|---|
| < 250 | Normal | Paper insulation healthy |
| 250 – 1000 | Moderate Aging | Monitor closely |
| 1000 – 2500 | Severe Aging | Plan maintenance/replacement |
| > 2500 | Critical Condition | Immediate action recommended |
Why Furan Analysis Matters
- Direct assessment of paper insulation condition
- Early detection of irreversible insulation aging
- Non-invasive alternative to physical sampling
- Supports Remaining Life Assessment (RLA)
- Enables long-term maintenance and planning
Our Testing Process
- Vacuum sample collection using barcode-identified bottles
- HPLC-based quantitative analysis in clean lab conditions
- IEC 61198-compliant chemical preparation and calibration
- Results uploaded to our ERP system with trend tracking
- Report includes AI-generated insights and actionable recommendations
Report Includes
- Individual and total furan compound concentrations
- Insulation aging classification (Normal / Severe / Critical)
- Comparison with historical trends (if available)
- Predicted DP range and life expectancy estimate
- Recommendations for load management or replacement
Why Choose Tru-FIL?
- Fully compliant with IEC 61198 standards
- NABL-grade laboratory with calibrated HPLC instruments
- AI-powered ERP for trend analysis and risk prediction
- 24/7 lab access with nationwide sample pickup
- Digital report delivery with client-specific dashboards