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Load imbalance in three-phase distribution transformers can increase neutral current and power losses, thereby reducing the efficiency and reliability of electric power distribution systems. This study aims to analyze the level of load imbalance, power losses caused by neutral current, and the effectiveness of manual load balancing using the two-time-point method, namely peak load time (PLT) and off-peak load time (OPLT). The research was conducted on the PNIAI007 distribution transformer at PT PLN (Persero) ULP Enarotali using a quantitative descriptive approach with a case study design. Data were obtained through measurements of phase currents and neutral current, which were then analyzed to compare conditions before and after load balancing.The results show that the load imbalance level was significantly reduced from more than 29% to 2.47% during daytime operation and 1.21% during nighttime operation. The neutral current decreased from 37.81 A to 14.58 A during the daytime and from 51.76 A to 19.83 A at night. In addition, power losses due to neutral current were reduced by more than 85%. These results indicate that the two-time-point load balancing method is effective in improving the efficiency and operational reliability of distribution transformers.

The purpose of this study is to provide empirical evidence about the influence of perceived benefits (perceived benefits) and perceived credibility (perceived credibility) to the use of e-banking. This study is based on Social Contract Theory and the Theory of Diffusion of Innovations. Samples are intended private companies located in Yogyakarta and gained as much as 71 companies. Statistical analysis is done is test the initial validity and reliability tests early, test construct validity and reliability tests construct instruments, test Classical Assumptions: Normality test, test Multicollinearity, Heteroskidastity test, and autocorrelation test. Multiple Regression Analysis to test the empirical model and hypotheses. The results showed that the perceived benefits of (Perceived Benefits) has a positive effect on the use of e-banking. However, the influence of perceived credibility (Perceived Credibility) against the use of E-Banking (E-Banking Usage) is not proven. Keywords: social contract theory, theory of diffusion of innovations, benefits perceived, perceived credibility and use of e-banking.