| 摘要 |
<p>PURPOSE:To perform 400V, 200V and 100V class single-phase 3-wired power distribution having accurate voltages with taps by providing a first secondary winding with a tap terminal led from its one end at a point of (2/3)N turn where N is the number of turns, a second secondary winding with a mid- terminal led from its mid-point of (2/3)N turn, and a third secondary winding with a tap terminal led from its end at a point of (1/3)N. CONSTITUTION:The number of turns of first and third secondary windings Cu2, Cw2 is N, and the number of turns of a second secondary winding Cv2 is 2n/3. A tap terminal U2t is led from a point of (2/3)N turn from one end U2 of the winding Cu2, and a tap terminal W2t is led from a point of (1/3) turn from one end W2 of the winding Cw2. The terminal U2t is connected to one end of the winding Cv2, the other end of the winding Cv2 is connected to the terminal W2t, the other end of the winding Cw2 is connected to one end of the winding Cu2, and the mid-point terminal O of the winding Cv2 is grounded. Voltages between the lines of the secondary terminals U2, V2, W2 are 400V class, and 200V/100V class single-phase 3-wired voltages can be supplied by terminals Vt1, O, Vt2.</p> |
