Computer representation of overcurrent relay characteristics

The representation of overcurrent relay characteristics in computer programs used for the application of relays in power systems is addressed. To make the process simple and effective, continuing work is needed so that the necessary data can be made readily available to the user with minimum effort. This committee activity has been in progress for a number of years and has been experiencing the fast developing changes in computer technology. Today, the available equipment ranges from mainframes to personal computers with memory that is adequate for this application. The possibility is explored of storing the digitized relay characteristics in tables. The representation of curves using a minimum number of constants is also discussed.<>