功率方向继电器最灵敏角为φsen,则动作范围为( )。
发布时间:2026-01-24
A.−90°+φsen≤φr≤0
B.φsen+90°≤φr≤180°
C.φsen−90°≤φr≤φsen+90°
D.0≤φr≤φsen+90°
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