File:Swedens first transformer installed in Bollnäs in 1889.tif

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Svenska: Den svartvita skissen illustrerar en transformator för elektricitetsdistribution i toppen av en trästolpe. Själva transformatorn täcks av ett tak och oktogonformade träväggar. Åtta par trådar går ut radiellt från träväggarna. Denna transformator, uppsatt i Bollnäs år 1889, var den första i Sverige att användas i drift. Endast ett misslyckat försök hade gjort i Stockholm tidigare. Den andra transformatorn i Sverige sattes upp i Motala.
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von Malmborg, Carl Gustaf (1891). Om elektrisk belysning: Populär framställning med 56 illustrationer : Upplysningar och råd för enhvar som har eller ämnar anskaffa elektrisk belysning. Stockholm: Nordin & Josephson.

Reference: National library of Sweden http://libris.kb.se/bib/1627920
Author Carl Gustaf von Malmborg

One of the images in the book: von Malmborg, Carl Gustaf (1891). Om elektrisk belysning: Populär framställning med 56 illustrationer : Upplysningar och råd för enhvar som har eller ämnar anskaffa elektrisk belysning. Stockholm: Nordin & Josephson. ( http://libris.kb.se/bib/1627920 )

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