High-power grounding resistance measuring device based on pilot frequency signals

• Main Authors: LI HANMING, YE ZHONGXIN, CHEN ZHENGDE, YIN YUANQING
• Format: Patent
• Language: Chinese; English
• Published: 13.11.2020
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The utility model relates to the technical field of grounding resistance testing devices. The utility model further discloses a high-power grounding resistance measuring device based on pilot frequency signals. The device comprises a variable-frequency power supply, an isolation transformer, a voltage and current sampling unit, a controllable switching measurement unit, a mainboard, a man-machineoperation unit, a filter circuit and software, the output end of the variable-frequency power supply is in one-way signal connection with the input end of the isolation transformer; the output end ofthe isolation transformer is in one-way signal connection with the input end of the voltage and current sampling unit, the output end of the voltage and current sampling unit is in one-way signal connection with the input end of the controllable switching measurement unit, and the output end of the controllable switching measurement unit is in one-way signal connection with the mainboard and the input end of the man-machin