The IED EP+ S24 Series is member of the EuroProt+ numerical protection relay, made by Protecta Co. Ltd. The EuroProt+ type complex protection in respect of hardware and software is modular device. The modules are assembled and configured according to the requirements, and then the software determines the functions. The IED EP+ S24 Series is contained a special selection of the EuroProt+ modules, bearing in mind the cost effective realization. The IED EP+ S24 Series is divided into several different variants corresponding to the scope of application.
The S24 Variant 5 relay is dedicated transformer protection and control IED for power transformers, unit and step-up transformers including power generator-transformer blocks in utility and industry power distribution systems.
The Variant 5 configuration measures three phase currents and the zero sequence current component from both sides of a two winding, three-phase transformer. The main protection functions are transformer differential protection and restricted earth-fault protection functions.
The realized current-based protection functions, including thermal replica protection functionand differential functions, are listed in
the Table below: