对 KIDDE 型干货舱烟雾探测系统电气控制线路原理理解正确的是 ______ 。 A. 当货舱火警发生时, N 电磁线圈失压,使相应的触点断开 B. 火警发生时,火警辅助继电器接通故障报警信号电路,保证火警的优先级 C. 有烟雾通过光电单元时,由于烟雾颗粒的折射作用,使光电池输出电压减小 D. 无烟雾通过光电单元时,光电池输出电压很小
A.
B.
C.
D.
D
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