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R/X-characteristic The starter system can be selected in the dialog “Starter” of the distance protection relay.Starter The following starter systems can be entered: The tripping time of the relays are displayed in the single line diagram. The evaluation or check of the relay settings can be done with a short circuit calculation. With menu option “Analysis-Distance protection-Protection device” the relay characteristic and the impedances seen by the relay in case of short circuits on nodes or lines are displayed in a R/X-diagram. This can be done in NEPLAN menu option “Analysis-Distance protection-Tripping schedules”. The tripping schedules are built-up by the user. The predefined list will be displayed, when pressing the button "…" beside “Predefined type” in the dialog distance protection. The program will build up the characteristic. When selecting the relay type from a predefined list, the user will be able to enter the relay dependent setting parameters in a special dialog. The user in the dialog distance protection can enter the type of the relay. predefined relay type (relay type predefined by the program) The characteristic of a general relay can be entered in a R/X-diagram.user-defined or general relay (relay type given by the user).The module distinguishes two types of relays

All impedance values shown in the module are calculated with a short circuit calculation according to the superposition method with or without load flow (see chapter "Short Circuit").