Power transformers are very key and High Value assets in T&D. Dissolved Gas Analysis (DGA) is considered the best method for determining a transformer’s overall condition and is now a universal practice. Advantages of DGA include: - Advanced warning of developing faults - Status checks on new and repaired units - Convenient scheduling of repairs - Monitoring of units under potential overload conditions Tenaga Nasional Berhad together with Calibr8 Systems jointly deployed and developed a Custom Symbols in PI Vision to automate the Duval's Triangle Interpretations and Diagnostics.