Applying a new on-line tool to easily set protection function for commercial relays

Nowadays, there are numerous protection relays manufacturers on the market with countless input parameters, which implies different ways to calculate the protection settings even for a specific protection function. Based on this, the present paper shows an online tool, under constant development, which provides an easy way to set protection elements of commercial relays. The present paper introduces the tool which returns a bunch of specific data based on short-circuit and the protection function of a specific relay manufacturer to help the configuration of the protection relay function desired. To accomplish that, information on the power system where the relays will be placed is provided to the tool. After the system configuration, it is necessary to provide the protection function and relay manufacturer under analysis. Currently, the tool features three models from well-known relay manufacturers. Other relays with the same protection function can also be analysed. Based on those data, the tool performs fault calculations along the entire line and also behind the line terminal relays. Afterward, the tool presents graphical results with all fault positions, guiding the user to find the best setting for each parameter of that particular protection function.