What Is Moisture Analysis in Transformer Oil?
Moisture analysis is a critical diagnostic test used to determine the amount of water dissolved in transformer insulating oil. Even minimal moisture levels can significantly reduce the dielectric strength of the oil, accelerate aging of the cellulose insulation, and increase the risk of electrical breakdown.
At Tru-FIL Ltd, we conduct moisture testing as per IEC 60814 standards, ensuring international accuracy and compliance.
Test Method – IEC 60814
We use the Karl Fischer Coulometric or Volumetric Titration Method, the industry-standard approach defined in IEC 60814. This test accurately measures the water content in ppm (parts per million), detecting even trace levels of moisture in both new and in-service transformer oils.
Why Moisture Testing Is Important
- Reduces Risk of Dielectric Failure: Moisture lowers the breakdown voltage of oil, increasing fault potential.
- Monitors Paper Insulation Aging: Water accelerates degradation of paper insulation inside transformers.
- Prevents Corrosion: Moisture encourages oxidation and acid formation in the oil.
- Early Warning System: Rising moisture can indicate leaks, seal failures, or insulation degradation.
| Transformer Type | Max Moisture (ppm) |
|---|---|
| New mineral oil | ≤ 35 ppm |
| In-service oil (dry) | ≤ 40 ppm |
| Aged oil (humid areas) | ≤ 60 ppm |
Our Testing Process
Sample Collection: Vacuum-sealed bottles with barcode tracking
Lab Analysis: Karl Fischer titration performed in humidity-controlled lab
AI-Enabled ERP Reporting: Results uploaded to your digital dashboard with interpretation
Alerts & Recommendations: Automatic alerts if values exceed safe limits
Why Choose Tru-FIL for Moisture Testing?
🧪 NABL-compliant lab processes
📲 Digital sample tracking via mobile app
🔍 ISO and IEC standard-compliant reporting
🧠 AI-backed result interpretation
🕐 24/7 operations for emergency response
Report Deliverables
- Moisture content (ppm)
- Comparison with IEC 60814 thresholds
- Trend chart (if history available)
- Action recommendations