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For over 35 years, Visa S.p.A. has been designing and developing energy solutions for the telecommunications industry. Transceiver stations (or BTS) are key components of any network, since they allow users to access mobile Internet and phone services. BTS, installed in the most diverse contexts, from cities to rural areas, require little power in kVA and continuous 24-hour service without interruption. This is why sector professionals, as well as tower companies themselves, must constantly focus on the pursuit of the best solutions to effectively manage systems while reducing operating expenses (OPEX), reducing the frequency of maintenance operations on site and taking into account a quick return on investment. Visa S.p.A. has proven to be an ideal partner for supporting telecommunications companies: it has the experience and technical know-how gained by supplying thousands of machines designed for specific BTS applications. A wide range of solutions have been developed, from the more traditional ones such as emergency generating sets to Smart Hybrid Systems that integrate alternative energy sources, battery-powered storage systems and DC variable speed generating sets that considerably reduce environmental impact and operating expenses.


With star the start of each of the three phases is connected together. Connections are taken from the ends of the three phases to give the three phases
Star symbol voltage


With Delta the starts and ends of the phases are connected. The end of phase 1 is connected to the start of phase 2, the end of phase 2 to the start of phase 3, and the end of phase 3 to the start of phase 1. Connections are taken from the three start-end points to give the three phases.
Delta symbol voltage
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