Laser inspection of defects in HV XLPE cable insulation

Author

Hong, Zhao ; Demin, Tu ; Hongwei, Zhao ; Xuan, Wang

Author_Institution

Xi´´an Jiaotong Univ., China

fYear

1995

fDate

17-20 Sep 1995

Firstpage

35

Lastpage

38

Abstract

Using the fact that under irradiation by a laser beam, black contaminants, microvoids and translucent impurities in XLPE insulation display different characteristics of light extinction and scattering, the relationships of detected pulse polarity with kinds of defects and the pulse width and amplitude with the size of the defects are found. Therefore, the detected signal can be applied for measuring and recognizing defects with the aid of a computer. The instrument for defect detection in bulk XLPE insulation is presented in this paper. It is shown in test results that the resolution of detection is 40 μm in HV XLPE samples with volume 33.6 cm³ at temperature 109°C

Keywords

XLPE insulation; inspection; insulation testing; insulator contamination; measurement by laser beam; power cable insulation; power cable testing; voids (solid); 109 C; HV XLPE cable insulation; black contaminants; defect detection; laser inspection; light extinction; light scattering; microvoids; translucent impurities; Cable insulation; Computer displays; Impurities; Inspection; Laser beams; Light scattering; Optical pulses; Pollution measurement; Signal detection; Space vector pulse width modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulating Materials, 1995. International Symposium on

Conference_Location

Tokyo

Print_ISBN

4-88686-047-8

Type

conf

DOI

10.1109/ISEIM.1995.496503

Filename

496503