Water Ingress & Transformer Dry-Out: Fix the Cause First
Moisture is among the most damaging threats to power transformer insulation, yet drying is often attempted before stopping water ingress the real root cause.
Moisture enters through conservator and radiator gaskets, cooler flanges and valves, bushing joints, manholes, breathers, PRDs, and instrument fittings. Although cellulose moisture may start below 1%, it steadily increases due to insulation aging, oil seepages, and poor sealing.
Keeping paper moisture below 2-3% is essential to preserve dielectric strength, limit aging, reduce bubble risk, and extend transformer life.
Drying without ingress control fails. Moisture re-enters faster than it can be removed, making results temporary.
Seal ingress → stabilize oil tightness → apply online transformer dry-out (TDS) → monitor trends.
Ingress control makes drying effective. Drying enables life extension.
Aligned with IEC 60422, IEC 60076-7, IEEE C57.91, IEEE moisture equilibrium principles.
✅ Seal ingress → stabilize oil tightness → apply online transformer dry-out (TDS) → monitor trends.
🔑 Ingress control makes drying effective. Drying enables life extension.
Aligned with IEC 60422, IEC 60076-7, IEEE C57.91, IEEE moisture equilibrium principles.