DIGSI 4.90 is a legacy version of the Siemens configuration software for SIPROTEC 4 protection devices. While 4.90 is no longer the current release, Siemens provides full versions and service packs for newer iterations (up to V5.00) that maintain compatibility and include modern drivers. Official Download and Installation
No. The UPD (update) is free only for existing DIGSI 4 customers with a valid Software Support Agreement. Without a license, you cannot commission or modify relays. Digsi 4.90 Download UPD
It works alongside SIGRA to evaluate disturbance records, helping to shorten outages by quickly locating grid faults. Transitioning Beyond Version 4.90 DIGSI 4
You may have searched for "Digsi 4.90 Download UPD." This typically refers to an file rather than a full installation package. Digsi 4.90 Download UPD