The product was designed by practical persons who have experience in the evaluation of faults. Accordingly, in addition to the usual time-signal display of the measured variables recorded, it is also designed to display vector diagrams, circle diagrams, bar charts for indicating the harmonics and data tables. From the measured values which have been recorded in the fault records, SIGRA 4 calculates further values, such as: absent quantities in the three-wire system, impedances, outputs, symmetrical components, etc. By means of two measuring cursors, it is possible to evaluate the fault trace simply and conveniently. Standard tools allow to evaluate just one fault record. With SIGRA, however, you can add additional fault records. This does not mean that you open a second fault record in a new window, but you add the signals of another fault record (e.g. from the opposite end of the line) to the current signal pattern by means of Drag&Drop. SIGRA4 offers the unique possibility to display signals from various fault records in one diagram and fully automatically synchronize these signals to a common time base. In addition to finding out the details of the line fault, the localization of the fault is of special interest. A precise determination of the fault location will save time that can be used for the on-site inspection of the fault. This aspect is also supported by SIGRA 4 – with its "offline fault localization" feature

SIGRA 4 can be used for all fault records which are available in the COMTRADE file format. The software product is easily and conveniently installed from a CD-ROM, it offers a comprehensive guiding system with demonstration, and an easily readable, practice-oriented manual describes the typical steps involved when using SIGRA.

The functional features and advantages of SIGRA4 can, however, only be optimally shown on the product itself. For this reason, it is possible to test SIGRA 4 for 30 days with the trial version.