7.2.1. Assembly and operating principle
A three-phase asynchronous motor whose stator winding has been designed for 220/380 V may be selectively driven through either a single-phase of three-phase mains. The winding is star-connected for 380 V voltage. The winding is delta-connected for single-phase operation. In addition, an operating capacitor is parallel switched to each strand.
A capacitor provides phase-displaced current for the third strand winding this yielding a rotating field. The rotational direction is altered by repoling the capacitor connection.
1 Anti-clockwise, 2 Clockwise
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