CSN EN 62689-2

CSN EN 62689-2 (35 1351) This part of IEC 62689 describes electric phenomena and electric system behaviour during faults, according to the most widely diffused distribution system architecture and to fault typologies, to define the functional requirements for fault passage indicators (FPI) and distribution substation units (DSU) (including their current and/or voltage sensors), which are, respectively, a device or a device/combination of devices and/or of functions able to detect faults and provide indications about their localization.
Original English text of CSN EN Standard.
The price of the Standard included all amendments and correcturs.