Energize Distribution Transformer 1 at Electrical Engineering Workshop State Polytechnic of Samarinda

Distribution transformers play a vital role in the electrical infrastructure by converting high voltage from the primary voltage source to a voltage suitable for use by end consumers. The energizing process, which is connecting the distribution transformer to the power source, is a critical stage in the implementation and operation of the electrical network. However, a thorough understanding of the factors that affect the efficiency, safety, and reliability of energizing is needed to ensure optimal transformer performance. The transformer energizing process begins with the secondary side of the transformer being given a voltage of 220/380 V 3 phase 50 Hz as input and making the secondary polarity of the transformer primary. Then the primary side of the transformer changes to the secondary side which outputs a voltage of 20 kV 3 phase 50 Hz. During the energizing process, the current flowing on the input or source side was measured at ± 5 A for each phase, 16.83 A at neutral, and 0.06 A at ground. The results of this process successfully energized the 25 kVA distribution transformer to a step-up with a note of the loss for the induction process indicated by the current flowing on the input side under no-load conditions.