In order to ensure that the optical fiber cable has insulation breakdown, mechanical damage or fire, in order to reduce the affected area, double protection of current, voltage, and control circuit of DC power supply and trip, etc., which need to strengthen the reliability of the system, Separate control fiber optic cables should be used.
After the optical fiber cable is controlled, there is a possibility of electrical disturbance between different cores of the same optical fiber cable, and there are many reasons for electrical disturbance.
Due to the electrostatic disturbance caused by the capacitive coupling of the externally applied optical fiber cable and the core fiber optic cable, and due to the electromagnetic induction disturbance, in general, which nearby voltage signal is at a high voltage, the source of the large current disturbance is disturbed, Electrical disturbances are more serious. Because the distance between the cores of the same optical fiber cable is small, the degree of disturbance is much greater than that of parallel laying of optical fiber cables. A certain high-voltage optical fiber cable substation breaks during phase separation operation. In the future, the control function of the device can be changed to an independent optical fiber cable, and no accidental touch has occurred, resulting in an accident.
