Siemens designs transformers for the Scottish offshore project

Siemens has custom-designed the offshore transformer module (OTM) for the Beatrice offshore wind farm, which contains an ultra-compact offshore transformer and a built-in earthing transformer.

The technical specifications for the three transformer units to deliver are 310 MVA for the 220 kV level in heavy-duty design with ONAN (oil-natural/air-natural) cooling, according to the manufacturer.

The transformers have very small dimensions: 13,100 x 7,300 x 7,700 mm (L x W x H) and a total weight of only 326 tons, while the earthing unit is built directly within the same tank as the transformer’s active part, the manufacturer explained.

The Beatrice offshore project will have a total capacity of 588 MW and will be one of the largest private investments ever made in Scottish infrastructure.

Source: Siemens