web supervisor


For this activity, Visa prefers to cooperate with the client’s installer directly providing technical and logistical support (labour and means) from the plant design phase to sizing the concrete plinth to the necessary documentation required at the building site, ex. POS, DURC etc. (valid for Italy only). Upon request, Visa is able to provide start up services*. The company has the credentials necessary to effect turn key installations and start up as well as issuing conformity certificates therefore providing the client further guarantee. (service can be quoted as an optional)


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
newsletter subscription
facebook like