Y. Ivanova1*, R. Bozhilov1, S. Ivanov2

1Department of Agricultural Engineering, Faculty of Agriculture, Trakia University Stara Zagora, Bulgaria
2Department of Electronics, Faculty of Electronics and Automation, Technical University Sofia, Plovdiv branch, 4000 Plovdiv, Bulgaria

(Manuscript received 30 June 2022; accepted for publication 16 May 2023)

Abstract. This paper discusses the basic principles of operation of a controller intended to limit the electrical energy consumption. The energy consumer is controlled depending on the amount of energy used, the magnitude of the load current and the pre-set permissible twenty-four-hour limit of electricity. The following possible situations are covered: the consumer has used energy equal to or less than the limit set within a 24-hour period; the consumer has used up the entire energy limit in less than 24 hours; the current through the consumer periodically exceeds the pre-set current limit; and training the consumer to use energy wisely by applying sanctions – temporary disconnections of the power supply. The method for programming and configurating the controller by means of a specialized remote equation is shown.