Flat sheath buffer layer volume resistivity detection device and method

• Main Authors: LI JI, FU XING, LI XU, LI LONGJI, ZHANG HUA, ZHU XIAOHUI, FANG SHENGCHEN, LIN GUOZHOU, SONG PENGXIAN, FANG JING
• Format: Patent
• Language: Chinese; English
• Published: 07.07.2023
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to a flat sheath buffer layer volume resistivity detection device and method, and the method comprises the steps: setting a short-circuit threshold value, an access threshold value, an access current threshold value and charging current time, comparing the distance between an upper electrode and a lower electrode of a test standard buffer layer sample and a tested buffer layer, and the reading of a galvanometer; and the volume resistivity of the measured buffer layer is calculated according to the reading. By adopting the method designed by the invention, the volume resistivity of the buffer layer of the flat-sheath high-voltage power cable can be detected. Different from the existing detection method and device, the method can simulate the overlapping, damp and pressed conditions of the wrapping tape of the buffer layer in the cable, the detection result is closer to the working condition, and the method is mainly used for the quality supervision and inspection of the buffer layer of th