Analysis of three-phase asymmetrical currents in the secondary voltage of signal change sensors in the power supply system using graph modelsAzizjan Abubakirov, Timur Kurbaniyazov and Muratbay BekimbetovE3S Web of Conf., 525 (2024) 03013DOI: https://doi.org/10.1051/e3sconf/202452503013