Alatubah: Perbezaan antara semakan

[[File:Polemount-singlephase-closeup.jpg|thumb|right|Transformer agihan dengan belitan sekunder pengulir tengah pada tiang yang digunakan untuk 'kuasa elektrik belahan fasa' bagi perkhidmatan komersil ringan dan perumahan.<ref name="Knowlton (1949)">{{cite book|last=Knowlton|first=A.E. (Ed.)|title=Standard Handbook for Electrical Engineers|edition=8th|year=1949|publisher=McGraw-Hill|page=597, Fig. 6–42}}</ref><ref name="Mack (2006)">{{cite book|last=Mack|first=James E.|coauthors=Shoemaker, Thomas|booktitle=The Lineman's and Cableman's Handbook|title=Chapter 15 - Distribution Transformers|year=2006|publisher=McGraw-Hill|location=New York|isbn=0071467890|pages=15-1 to 15-22|url=http://books.mcgraw-hill.com/downloads/products/0071467890/0071467890_ch15.pdf|edition=11th}}</ref>]]