FIELD: electrical engineering. SUBSTANCE: transformer has one or several magnetic cores with one primary and two secondary windings. Primary one is made of two parts. One of parts of primary winding is applied over entire perimeter of at least one magnetic core. The other part of primary winding is applied in the form of sections of several layers of winding wire. Positioning of second part of primary winding, details of make of secondary windings and their location, winding connections and relationship of windings and magnetic cores are specified in description of invention. EFFECT: improved operational characteristics. 9 cl, 7 dwg
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