Robinson Sinaga et al. 2026. Analysis of Load Imbalance in 20 kV/400 V Distribution Transformers at PT PLN (Persero) Siantar Kota ULP Operational Area Robinson Sinaga, Siti Anisah, Dian Yulis Wulandari . International Conference Epicentrum of Economic Global Framework. (Feb. 2026), 1485–1494.