通过对电力机车掉分相及带电过分相的原因及危害的详细介绍,具体阐释相应的预防措施,以期减少该类故障对电气化医段运营造成的安全威胁。 Through the detailed introduction of the reasons and hazards of the electric locomotive dropping out of phase and the overcharged phase, the corresponding precautionary measures are explained in detail in order to reduce the security threats caused by such faults to the operation of electrified medical units.