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25赫兹相敏轨道电路
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25赫兹相敏轨道电路
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轨道电路
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25Hz phase detecting track circuit
25赫兹相敏轨道电路
具有两个供电单元传送25赫兹交流信号,除从钢轨取得电源外,还需另外供给局部电源,采用调相方式的轨道电路制式。当两个单元同时得到规定相位差的25赫兹交流电源时,轨道继电器吸起,否则落下,用于反映本区段有、无列车两种状态的25赫兹交流信号的轨道电路。
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