题目内容
三段式电流保护的主保护是（ ）
2026-01-24
A.电流速断+限时电流速断
B.限时电流速断+定时限过电流保护
C.电流速断+定时限过电流保护
D.电流速断+限时电流速断+定时限过电流保护
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