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Latest news about Onis Visa Diesel Generating sets

10 Jul

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 Jun

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 May

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

22 May

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

06 Feb

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

26 Jan

Visa SpA will be exhibiting at the Italian Agriculture and Livestock Exhibiion FAZI 2018, the complete event referring to the agricultural sector...

25 Jan

Also this year Visa won’t miss its attendance at Middle East Electricity 2018, the region’s leading international trade event for the power industry, from 6th to 8th March 2018...

22 Dec

Once again Visa SpA confirms its commitment and passion for ski sports and activities.

22 Dec

For Christmas this year, Visa SpA has decided to help make a difference in the quality care given to terminally ill patients.

27 Oct

Don’t miss the opportunity to see and personally touch the quality of Onis Visa electricity generators.
Power Gen International Exhibition, Las Vegas, 5-7 December 2017...


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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