Multi-selection CT polarity test circuit and device

• Main Authors: WEN YUNLONG, LIU WENPING, XIAO XING, ZHOU HENG, ZENG WEI, LUO HAIXIN, MENG CHENXU, DING YAO, WANG ZHENGANG, FAN DEHE, CAI GENMAN, LI XINHAI, ZENG LINGCHENG, YUAN TUOLAI, QIU TIANYI, LIU DEZHI
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2023
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to the technical field of mutual inductor detection, and discloses a multi-selection CT polarity test circuit and device. The circuit comprises a power supply module, a charging and discharging module, a sampling module, a main control module and a display module, the charging and discharging module comprises a capacitor unit, an adjusting unit and a charging and discharging switching unit, and the adjusting unit is used for adjusting the capacitance capacity of the capacitor unit; the capacitor unit is respectively connected with the power supply module and the primary side of the winding of the tested CT through the charging and discharging switching unit; the sampling module is used for collecting a current response signal of the secondary side of the winding; the main control module is used for controlling the charge and discharge switching unit to be connected to the primary side of the winding when receiving a test instruction, so that the capacitor unit performs discharge through-