Seepromting, K., Rajitroj, N., Michel, J., Onlam, A., Surawanitkun, C. and Siritaratiwat, A. 2026. Multiclass Non-Technical Loss Detection with Reduced Synthetic Data via a Two-Stage Hierarchical 1D-CNN. ECTI Transactions on Electrical Engineering, Electronics, and Communications. 24, 2 (Jun. 2026). DOI:https://doi.org/10.37936/ecti-eec.2026242.263037.