Articles

Energize Transformer 400kVA at State Polytechnic of Samarinda with Simulation

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The purpose of this study is to analyze the performance and effectiveness of the Energize 400kVA Transformer model which acts as a step-up transformer in the electric power distribution system. The focus of this study is to evaluate the efficiency of the transformer in increasing the voltage from medium to higher levels and the impact of this conversion on power stability, energy losses, and thermal resistance.Testing was carried out by operating the transformer at various load levels and measuring performance parameters such as copper and iron losses, voltage regulation, and cooling capacity. The results showed that the Energize Transformer 400kVA can operate optimally as a step-up transformer with high efficiency in the load range of 70-90% of full capacity and good voltage stability when the load changes. The transformer cooling system also proved effective in maintaining the operating temperature within safe limits, thus contributing to a longer service life and shorter maintenance intervals. Based on these results, the Energize Transformer 400 kVA model is suitable for use as a step-up transformer in medium to large distribution networks, supporting optimal power quality and high operational efficiency.

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

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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.