Abstract

The distribution transformer has two secondary windings as output namely X1 and X2. Wherever it is used in the field, the load between X1 and X2 is very difficult to balance. So it also affects the amount of neutral current flowing in the transformer. The very large neutral current of the transformer affects the loading on the transformer. So that makes the transformer overload. This can shorten the life of the transformer. Therefore, it is necessary to balance the transformer load. Where the loads X1 and X2 must be balanced. Thus reducing the amount of neutral current that comes out. Balancing is done by shifting the load so that X1 and X2 are the same load. After balancing, the neutral current that flows is small. If the neutral current that flows is reduced, it can add to the value of the efficiency of the transformer. In accordance with the calculations in this study, the transformer can achieve efficiency of 91.49% -99.8% when the average imbalance is 0% to 9.04%, efficiency is 81.29% - 89.10% when the average imbalance is 11, 17% to 23.22%, efficiency 70.01% - 76.61% when the average imbalance is 30.23% - 41.97%. Then the lower the unbalance average, the higher the efficiency of the transformer.