au·to·trans·form·er (ô t -tr ns-fôr m r)n. An electrical transformer in which the primary and secondary coils have some or all windings in common. |
autotransformer [ˌɔːtəʊtrænsˈfɔːmə]
n
(Engineering / Electrical Engineering) a transformer in which part of the winding is common to both primary and secondary circuits
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