| Definition: | a transformer in which the magnetic circuit takes the form of columns (legs)
NOTE 1 – Generally, core-type transformers incorporate concentric windings.
NOTE 2 – Since there are types of transformer which do not come clearly within the categories of "core-type" and "shell-type", the use of these terms is deprecated. Generally they can be avoided by indicating the type of windings, i.e. "concentric" or "sandwich", and/or whether or not the magnetic circuit has unwound magnetic return paths.
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