Design of the electrical energy meter leading to an automatic evaluation of the preliminary cost of electrical energy consumption

This research was to study the design and construction of the electrical energy meter leading to an automatic evaluation of the preliminary electrical energy expenses. The design of the electrical energy meter and the standard energy meter were used to record the data of the electrical power (W) and electrical energy consumption (kWh). The measurement of the data were done from the 5 electrical instruments. There are the refrigerator, compact fluorescent, fan, television and notebook. Then, the data were automatically calculated to the energy price (THB). It was observed that the percentage of the error data of electrical power (W) was in the range of 1.6 ± 0.7 to 4.5 ± 0.0 %. Furthermore, the data recording of the electrical energy consumption (kWh) and the error of each instrument were observed. It was found that the value of the percentage of the error was the maximum value of 5%. The energy price from the electrical energy consumption of each instruments were observed. The minimum value of the energy price was 0.05 THB from the compact fluorescent. The Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from result of the maximum value of the energy price was 0.27 THB from the refrigerator.