Large buildings use lots of electrical equipment. The equipment includes air conditioning systems, building transportation, pumps, and others. One of the problems often encountered is the emergence of a decrease in power factor due to inductive loads. These induction machines cause this inductive load. One way to overcome this problem, Capacitor Bank is needed. The building that we observed is a building that has been operating for more than 20 years and has undergone a Single Line Diagram (SLD) change, where the capacitor bank does not work properly so the power factor is close to 0.85. This study rearranges the SLD according to the latest electrical loads in the building. The new SLD results are simulated using the Load Flow Analysis method with ETAP software, to achieve a quality factor of 0.99. In the Individual Compensation Method, it produces a savings of 13.9 kW, and this will result in a return on investment in the 40th month, and in the 2nd method, we use the Global Compensation Method which results in an improvement of 9.7 kW and a return on investment in the 57th month.

In this era of globalization, the needs of remote control systems is<br />increasing, where the system used is more sophisticated. Similarly, when a transformer<br />operator in electrical substations, which will control and monitor the load transformer 20<br />KV is still done by hand. This will result in less efficient and optimal performance of the<br />operator. We need a system that can control remotely. To overcome these problems, hence<br />designed "Host Mini SCADA systems for controlling the load on 20 KV transformer<br />substations parent. With this system an operator can perform control and monitoring of the<br />load transformer 20 KV, among others: Frequency, Current, Voltage, and Temperature. In<br />addition, this system also can detect if the transformer is faulty. Monitoring and controlling<br />performed remotely via SMS Gateway. This system consists of a PC (Personal Computer),<br />which functions as process control and remote control units. GSM Modem serves to make<br />the process of data transfer via SMS (Short Message Service). Software Visual Basic, a<br />programming language used to create a program / software on Host mini SCADA system.

In this era of globalization, the needs of remote control systems is increasing, where the system used is more sophisticated. Similarly, when a transformer operator in electrical substations, which will control and monitor the load transformer 20 KV is still done by hand. This will result in less efficient and optimal performance of the operator. We need a system that can control remotely. To overcome these problems, hence designed "Host Mini SCADA systems for controlling the load on 20 KV transformer substations parent. With this system an operator can perform control and monitoring of the load transformer 20 KV, among others: Frequency, Current, Voltage, and Temperature. In addition, this system also can detect if the transformer is faulty. Monitoring and controlling performed remotely via SMS Gateway. This system consists of a PC (Personal Computer), which functions as process control and remote control units. GSM Modem serves to make the process of data transfer via SMS (Short Message Service). Software Visual Basic, a programming language used to create a program / software on Host mini SCADA system.