Design of the Electrical Energy Meter Leading to an Automatic Evaluation of the Preliminary Cost of Electrical Energy Consumption

Abstract

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 result of the maximum value of the energy price was 0.27 THB from the refrigerator.