EVCOME EV charging stations for better life---Top EV charging stations manufacturers & suppliers in China.
Language
EVCOME EV charging stations for better life---Top EV charging stations manufacturers & suppliers in China.
A commonly used fixed-point method for new energy cable faults. 1. Acoustic measuring point method. The acoustic measurement fixed-point method is the main fixed-point method for new energy cable faults, and is mainly used to measure high resistance and flashover faults. During the measurement, high voltage equipment is used for click and discharge faults. When the mechanical vibration generated by the fault gap discharge is transmitted to the ground, a popping sound will be heard. Using this phenomenon, new energy cable faults can be located very accurately, but the disadvantage is that it is greatly affected by external interference. 2. Acoustomagnetic method When an impact high-voltage signal is applied to the new energy cable to discharge the fault point, the circuit formed by the skin of the new energy cable and the earth will induce a circulating current, which will generate a pulsed magnetic field around the new energy cable. While monitoring the sound signal, the pulsed magnetic field signal is received, and it is judged that the sound is caused by the discharge of the fault point, and the fault point is nearby. 3. Audio induction method. The audio frequency induction method is generally used to detect low-resistance faults whose fault resistance is less than 10Ω. During detection, use a 1kHz audio signal generator to send electromagnetic waves to the new energy cable to be tested through audio current; then receive the electromagnetic field signal along the path of the new energy cable to be tested, and send it to the amplifier for amplification. In the fault detection of power new energy cables, it is necessary to carefully and calmly analyze the type and nature of faults, correctly use search methods and instruments, and accumulate more fault search experience. At present, there are still some limitations in the fault detection method of power new energy cables, and there is still a certain gap between domestic and foreign power new energy cable fault diagnosis instruments and technologies. With the advancement of science and technology, the fault diagnosis technology of electric power new energy cables has been continuously improved. .
Recommend:
