Research on measuring magnetic field around 10kV cable based on three-split magnetic core

The utilization of 10kV cable in urban distribution networks and industrial settings necessitates regular maintenance and fault detection to guarantee uninterrupted power supply. Ensuring the de-energization of inspected cables on-site is crucial for operator safety, yet current methods for evaluating the energization status of 10kV cables lack effectiveness. This study introduces an electromagnetic detection sensor utilizing a three-split magnetic core design, aimed at addressing the issue of zero magnetic field integral resulting from the three-phase current vector sum of 0 in a 10kV cable. This study employs theoretical analysis and finite element simulation to investigate the magnetic induction state of a three-split magnetic core surrounding a 10kV distribution cable. The findings confirm that the three-split magnetic core is capable of detecting the magnetic field generated by the current load in the phase conductor on the outer surface of the 10kV cable. These results offer theoretical justification for further research into live state detection technology for 10kV cables utilizing the three-split magnetic core.