Spatial Resolution between Two Abnormalities in a Cable by Frequency Domain Reflectometry

Yoshimichi Ohki; Naoshi Hirai

doi:10.1002/tee.23376

Spatial Resolution between Two Abnormalities in a Cable by Frequency Domain Reflectometry

Yoshimichi Ohki, Naoshi Hirai^*

^*Corresponding author for this work

Kagami Memorial Research Institute for Materials Science and Technology

Research output: Contribution to journal › Article › peer-review

Abstract

The spatial resolution of a cable fault location method by frequency domain reflectometry was examined experimentally by giving two abnormalities intentionally along a 31.5-m coaxial cable. As a result, two clear signal peaks appear, which can locate the presence of two hot spots perfectly if they are separated by more than 30 cm at a position about 15 m from the cable end with a measuring device. In addition, a clear signal peak with a small shoulder is recognized if the two hot spots are 1 cm away. Although the abnormalities were given in this research by heating the cable using tape heaters, the spatial resolution should be theoretically similar for any type of fault in a cable as long as it changes the characteristic impedance of the cable.

Original language	English
Pages (from-to)	822-826
Number of pages	5
Journal	IEEJ Transactions on Electrical and Electronic Engineering
Volume	16
Issue number	6
DOIs	https://doi.org/10.1002/tee.23376
Publication status	Published - 2021 Jun

Keywords

cable
characteristic impedance
electrical insulation
fault location
preventive maintenance

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1002/tee.23376

Cite this

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title = "Spatial Resolution between Two Abnormalities in a Cable by Frequency Domain Reflectometry",

abstract = "The spatial resolution of a cable fault location method by frequency domain reflectometry was examined experimentally by giving two abnormalities intentionally along a 31.5-m coaxial cable. As a result, two clear signal peaks appear, which can locate the presence of two hot spots perfectly if they are separated by more than 30 cm at a position about 15 m from the cable end with a measuring device. In addition, a clear signal peak with a small shoulder is recognized if the two hot spots are 1 cm away. Although the abnormalities were given in this research by heating the cable using tape heaters, the spatial resolution should be theoretically similar for any type of fault in a cable as long as it changes the characteristic impedance of the cable.",

keywords = "cable, characteristic impedance, electrical insulation, fault location, preventive maintenance",

author = "Yoshimichi Ohki and Naoshi Hirai",

note = "Funding Information: This research was performed under the research entrusted by Secretariat of Nuclear Regulation Authority in Japan. Publisher Copyright: {\textcopyright} 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.",

year = "2021",

month = jun,

doi = "10.1002/tee.23376",

language = "English",

volume = "16",

pages = "822--826",

journal = "IEEJ Transactions on Electrical and Electronic Engineering",

issn = "1931-4973",

publisher = "John Wiley and Sons Inc.",

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TY - JOUR

T1 - Spatial Resolution between Two Abnormalities in a Cable by Frequency Domain Reflectometry

AU - Ohki, Yoshimichi

AU - Hirai, Naoshi

N1 - Funding Information: This research was performed under the research entrusted by Secretariat of Nuclear Regulation Authority in Japan. Publisher Copyright: © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

PY - 2021/6

Y1 - 2021/6

N2 - The spatial resolution of a cable fault location method by frequency domain reflectometry was examined experimentally by giving two abnormalities intentionally along a 31.5-m coaxial cable. As a result, two clear signal peaks appear, which can locate the presence of two hot spots perfectly if they are separated by more than 30 cm at a position about 15 m from the cable end with a measuring device. In addition, a clear signal peak with a small shoulder is recognized if the two hot spots are 1 cm away. Although the abnormalities were given in this research by heating the cable using tape heaters, the spatial resolution should be theoretically similar for any type of fault in a cable as long as it changes the characteristic impedance of the cable.

AB - The spatial resolution of a cable fault location method by frequency domain reflectometry was examined experimentally by giving two abnormalities intentionally along a 31.5-m coaxial cable. As a result, two clear signal peaks appear, which can locate the presence of two hot spots perfectly if they are separated by more than 30 cm at a position about 15 m from the cable end with a measuring device. In addition, a clear signal peak with a small shoulder is recognized if the two hot spots are 1 cm away. Although the abnormalities were given in this research by heating the cable using tape heaters, the spatial resolution should be theoretically similar for any type of fault in a cable as long as it changes the characteristic impedance of the cable.

KW - cable

KW - characteristic impedance

KW - electrical insulation

KW - fault location

KW - preventive maintenance

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Spatial Resolution between Two Abnormalities in a Cable by Frequency Domain Reflectometry

Abstract

Keywords

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