Monitoring of electrical quantities in final circuits of electrical installations

One of the ways to ensure safe predictable and efficient operation of electrical devices is to develop a system to supervise and control the electrical installation, where the devices are installed. A structure of such a supervisory control system for a building installation can be of diversified in order to meet expectations and needs of the building owner. Various measuring devices of various manufacturers can be used as a data source with programmable logic controllers (PLC’s) in that number. They make possible to develop flexible intelligent installations that fit operational characteristics of the building structure, where they are developed and devices that operate there. The paper presents a system to supervise operation of an electrical installation that has been implemented in practice. The system takes advantage of operational and IT characteristics of PLC's and presents a research task, which means that it can evolve along with adding new elements to it.