The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Zantedeschi Impianti:
This application is designed to help all electricians and electrical contractors in sizing electric lines and used in AC. The application is divided into two main sections: 1 - Calculation and conversion of power 2 - Calculation of power lines In the first section, you can calculate the current absorbed by a load on the power in kW or CV, operating voltage and power factor. E ' can also calculate the date or reverse current back to the power or horses user. This may be set phase lines that three-phase lines. In the second section, you can dimension a line Determine the theoretical minimum power with method of voltage drop. Setting power load line length, operating voltage, power factor and the maximum voltage drop% program calculates the current line and the section theoretical minimum to be used for both phase lines that for three-phase lines.