Drying-Out Method of Transformer – Complete Guide ⚡💧
Drying-Out Method of Transformer – Complete Guide ⚡💧 Moisture is one of the most dangerous enemies of a transformer. It drastically reduces insulation resistance, lowers dielectric strength of oil, accelerates ageing of paper insulation, and can lead to failures during operation. Therefore, drying-out the transformer —especially new units or those kept out of service for long—is a critical commissioning step. This article explains the methods, procedures, drying-out duration, and purification techniques in a simple and professional manner. 😊📘 ⭐ What Is the Need for Drying-Out a Transformer? The primary challenge in drying out a transformer is not drying the oil, because oil can be filtered easily. The real difficulty lies in removing moisture absorbed by the windings and insulation 🧵💧. These materials are hygroscopic and absorb moisture from the atmosphere. If left untreated: 👉 Insulation resistance drops 👉 Dielectric strength reduces 👉 Partial discharge risk in...