FIELD: machine building.
SUBSTANCE: invention relates to a polarity switch for a control transformer, which comprises first winding (2) for the AC network phase to be controlled; first connecting terminal (1.1), which can be connected to winding (2); second connecting terminal (1.2), which can be connected to branch (3); vacuum arc-extinguishing chamber (4); breaker (5); resistance (6), which is connected in series with vacuum arc-quenching chamber (4) and breaker (5); wherein first connecting terminal (1.1) is connected through serial connection to second connecting terminal (1.2).
EFFECT: technical result is provision of the adjustment transformer free from interference and gases.
11 cl, 8 dwg
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