A transformer is a static electrical device that transfers energy bi inductive couplin atween its windin circuits. A varyin current in the primary windin creates a varyin magnetic flux in the transformer's core an thus a varyin magnetic flux through the seicontary windin. This varyin magnetic flux induces a varyin electromotive force (emf) or voltage in the seicontary windin. Transformers can be uised tae vary the relative voltage o circuits or isolate them, or baith.

Pole-moontit distreibution transformer wi center-tapped seicontary windin uised tae provide 'split-phase' pouer for residential an licht commercial service, which in North Americae is typically ratit 120/240 volt.[1][2]

Transformers range in size frae thumbnail-sized uised in microphones tae units wichin hundrits o tons interconnectin the pouer grid. A wide range o transformer designs are uised in electronic an electric pouer applications. Transformers are essential for the transmission, distreibution, an utilization o electrical energy.


  1. Knowlton, A.E. (Ed.) (1949). Standard Handbook for Electrical Engineers (8th ed.). McGraw-Hill. p. 597, Fig. 6–42.CS1 maint: extra text: authors leet (link)
  2. Mack, James E. (2006). Chapter 15 - Distribution Transformers (PDF) (11th ed.). New York: McGraw-Hill. pp. 15-1 to 15-22. ISBN 0071467890. Archived frae the original (PDF) on 10 Februar 2013. Retrieved 11 October 2013. Unknown parameter |coauthors= ignored (|author= suggested) (help)