【单选题】
道口轨道电路与微电子交流计数电码轨道电路或移频轨道电路叠加时，道口控制器安装地点应距轨道电路送、受电端_______以上。[321010103]___
A. 25m
B. 50m
C. 75m
D. 100m
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答案
B
解析
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道口轨道电路与ZPW-2000、UM系列轨道电路叠加时，闭路式道口控制器安装地点应距调谐区不小于_______。[311010103]___
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97型25Hz相敏轨道电路在调整状态时，轨道继电器轨道线圈上的有效电压应不小于_______。[323010102]___
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用0.06Ω标准分路电阻线在97型25Hz轨道电路送、受电端轨面上分路时，轨道继电器端电压应不大于_______。[3230101002]___
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97型25Hz相敏轨道电路轨道继电器至轨道变压器间的电缆电阻不大于_______。[322010103]___
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在轨道电路空闲状态下，JXW25型电子接收器输出给执行继电器的电压为_______。[321010102]___
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JXW25型电子接收器的应变时间为_______。[321010103]___
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