An early investigation blamed the signal system failure on a loss of power.
初期调查是归咎于停电造成信号灯故障。
This paper introduces the working principle, realizing method, main functions and anti-intrusion measures of two-way signal power supply monitoring and failure logging devices.
介绍了双路信号电源监测装置的工作原理、实现方法、主要功能与抗干扰措施。
The final basic cause that resulted in the failure is no working state monitoring signal and failure warning signal of power supply source of controlled silicon excitation device.
最终查出造成机组事故的根本原因是可控硅励磁装置供电电源无工作状态监视信号及故障报警信号；
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