若某三相变压器联结组别标号为Yd9,则该变压器高压侧线电压UAB和低压侧线电压Uab的相位关系为( )。
发布时间:2026-01-23
A.UAB超前Uab90°
B.UAB滞后Uab90°
C.UAB与Uab同相
D.无法判断
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