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Latest news about Onis Visa Diesel Generating sets

30 nov

Visa SpA will be exhibiting at Power-gen International in Orlando, USA.

14 nov

VISA SPA a le plaisir d'annoncer sa participation à la Foire POLLUTEC 2018

18 oct

Also this year, VISA SPA will be exhibiting at the EIMA SHOW, the biennial International Exposition of Machinery for Agriculture and Gardening.

08 oct

Also this year Visa SpA wil be participating to "Hotel 2018", the exhibition specifically dedicated to the hotel and restaurant sector.

26 sep

Visa SpA will be attending GEOFLUID the most important International Event for Drilling and Foundations Technologies and Equipment for Research, Extraction and Transport of...

10 juil

In addition to our innate Italian passion for football, especially when played at so high level, Visa Spa has an additional good reason to be so excited in following the FIFA...

14 juin

In its constant effort to give maximum attention and care to health and safety in the workplace, Visa Spa has taken another step forward.

23 mai

VISA SPA is proud to be, also this year, the technical supplier of the Giro d’ Italia

22 mai

Onis Visa power generators recently distributed by the Libyan Health Ministry to medical centers

06 fév

Visa Spa and Perkins confirm also for 2018 their strong relationship, on a journey that continues more than 25 years on.


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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