Remaining service life diagnostic technology of phenol insulators for circuit breakers

S. Miki, T. Hasegawa, S. Umemura, H. Okazawa, Y. Otsuka, H. Matsuki, S. Tsunoda, Hiroshi Inujima

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We developed remaining service life diagnostic technology of phenol insulators for circuit breakers. Phenol insulators were analyzed by chemical evaluation such as ion concentration and coloration, and the results were diagnosed by the Mahalanobis-Taguchi system (MTS), which is a pattern information technology. Particularly effective items for diagnosis included ions of nitric acid, sulfuric acid, chloride, and calcium. Since there was a good relationship between the results diagnosed by MTS and the actual measurement results of surface resistivity, we found that applying MTS to the chemical evaluation results allowed deterioration diagnosis of phenol insulators instead of surface resistivity, which couldn't be measured on-site. Time was defined as the end of the service life when electrical discharge was initiated and remaining service life was predicted. The linear relationship (master curve of service life) was clarified between the real number value of elapsed time and the logarithmic value of surface resistivity at 50% RH, and remaining service life was predicted from the diagnosis results by MTS and the year in which the master curve and the threshold value intersect. Surface resistivity (threshold value) for electrical discharge initiation was derived from creepage distance, permittivity of phenol insulators, frequency, etc. We substantiated that the remaining service life of the phenol insulators could be predicted by this technology because a good relationship existed between the check examination results of the electric discharge initiation in the laboratory and the prediction results.

Original languageEnglish
Article number4483467
Pages (from-to)476-483
Number of pages8
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Volume15
Issue number2
DOIs
Publication statusPublished - 2008 Apr

Fingerprint

Electric circuit breakers
Service life
Phenols
Electric discharges
Ions
Nitric acid
Sulfuric acid
Information technology
Deterioration
Calcium
Permittivity

Keywords

  • Chemical evaluation
  • Circuit breakers
  • Electric discharge
  • Mahalanobis-Taguchi system
  • Phenol insulators
  • Remaining service life diagnosis

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Remaining service life diagnostic technology of phenol insulators for circuit breakers. / Miki, S.; Hasegawa, T.; Umemura, S.; Okazawa, H.; Otsuka, Y.; Matsuki, H.; Tsunoda, S.; Inujima, Hiroshi.

In: IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 15, No. 2, 4483467, 04.2008, p. 476-483.

Research output: Contribution to journalArticle

Miki, S. ; Hasegawa, T. ; Umemura, S. ; Okazawa, H. ; Otsuka, Y. ; Matsuki, H. ; Tsunoda, S. ; Inujima, Hiroshi. / Remaining service life diagnostic technology of phenol insulators for circuit breakers. In: IEEE Transactions on Dielectrics and Electrical Insulation. 2008 ; Vol. 15, No. 2. pp. 476-483.
@article{c0489f4ab9a24e18897bda8f4ac8f9d4,
title = "Remaining service life diagnostic technology of phenol insulators for circuit breakers",
abstract = "We developed remaining service life diagnostic technology of phenol insulators for circuit breakers. Phenol insulators were analyzed by chemical evaluation such as ion concentration and coloration, and the results were diagnosed by the Mahalanobis-Taguchi system (MTS), which is a pattern information technology. Particularly effective items for diagnosis included ions of nitric acid, sulfuric acid, chloride, and calcium. Since there was a good relationship between the results diagnosed by MTS and the actual measurement results of surface resistivity, we found that applying MTS to the chemical evaluation results allowed deterioration diagnosis of phenol insulators instead of surface resistivity, which couldn't be measured on-site. Time was defined as the end of the service life when electrical discharge was initiated and remaining service life was predicted. The linear relationship (master curve of service life) was clarified between the real number value of elapsed time and the logarithmic value of surface resistivity at 50{\%} RH, and remaining service life was predicted from the diagnosis results by MTS and the year in which the master curve and the threshold value intersect. Surface resistivity (threshold value) for electrical discharge initiation was derived from creepage distance, permittivity of phenol insulators, frequency, etc. We substantiated that the remaining service life of the phenol insulators could be predicted by this technology because a good relationship existed between the check examination results of the electric discharge initiation in the laboratory and the prediction results.",
keywords = "Chemical evaluation, Circuit breakers, Electric discharge, Mahalanobis-Taguchi system, Phenol insulators, Remaining service life diagnosis",
author = "S. Miki and T. Hasegawa and S. Umemura and H. Okazawa and Y. Otsuka and H. Matsuki and S. Tsunoda and Hiroshi Inujima",
year = "2008",
month = "4",
doi = "10.1109/TDEI.2008.4483467",
language = "English",
volume = "15",
pages = "476--483",
journal = "IEEE Transactions on Dielectrics and Electrical Insulation",
issn = "1070-9878",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "2",

}

TY - JOUR

T1 - Remaining service life diagnostic technology of phenol insulators for circuit breakers

AU - Miki, S.

AU - Hasegawa, T.

AU - Umemura, S.

AU - Okazawa, H.

AU - Otsuka, Y.

AU - Matsuki, H.

AU - Tsunoda, S.

AU - Inujima, Hiroshi

PY - 2008/4

Y1 - 2008/4

N2 - We developed remaining service life diagnostic technology of phenol insulators for circuit breakers. Phenol insulators were analyzed by chemical evaluation such as ion concentration and coloration, and the results were diagnosed by the Mahalanobis-Taguchi system (MTS), which is a pattern information technology. Particularly effective items for diagnosis included ions of nitric acid, sulfuric acid, chloride, and calcium. Since there was a good relationship between the results diagnosed by MTS and the actual measurement results of surface resistivity, we found that applying MTS to the chemical evaluation results allowed deterioration diagnosis of phenol insulators instead of surface resistivity, which couldn't be measured on-site. Time was defined as the end of the service life when electrical discharge was initiated and remaining service life was predicted. The linear relationship (master curve of service life) was clarified between the real number value of elapsed time and the logarithmic value of surface resistivity at 50% RH, and remaining service life was predicted from the diagnosis results by MTS and the year in which the master curve and the threshold value intersect. Surface resistivity (threshold value) for electrical discharge initiation was derived from creepage distance, permittivity of phenol insulators, frequency, etc. We substantiated that the remaining service life of the phenol insulators could be predicted by this technology because a good relationship existed between the check examination results of the electric discharge initiation in the laboratory and the prediction results.

AB - We developed remaining service life diagnostic technology of phenol insulators for circuit breakers. Phenol insulators were analyzed by chemical evaluation such as ion concentration and coloration, and the results were diagnosed by the Mahalanobis-Taguchi system (MTS), which is a pattern information technology. Particularly effective items for diagnosis included ions of nitric acid, sulfuric acid, chloride, and calcium. Since there was a good relationship between the results diagnosed by MTS and the actual measurement results of surface resistivity, we found that applying MTS to the chemical evaluation results allowed deterioration diagnosis of phenol insulators instead of surface resistivity, which couldn't be measured on-site. Time was defined as the end of the service life when electrical discharge was initiated and remaining service life was predicted. The linear relationship (master curve of service life) was clarified between the real number value of elapsed time and the logarithmic value of surface resistivity at 50% RH, and remaining service life was predicted from the diagnosis results by MTS and the year in which the master curve and the threshold value intersect. Surface resistivity (threshold value) for electrical discharge initiation was derived from creepage distance, permittivity of phenol insulators, frequency, etc. We substantiated that the remaining service life of the phenol insulators could be predicted by this technology because a good relationship existed between the check examination results of the electric discharge initiation in the laboratory and the prediction results.

KW - Chemical evaluation

KW - Circuit breakers

KW - Electric discharge

KW - Mahalanobis-Taguchi system

KW - Phenol insulators

KW - Remaining service life diagnosis

UR - http://www.scopus.com/inward/record.url?scp=42149103210&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=42149103210&partnerID=8YFLogxK

U2 - 10.1109/TDEI.2008.4483467

DO - 10.1109/TDEI.2008.4483467

M3 - Article

AN - SCOPUS:42149103210

VL - 15

SP - 476

EP - 483

JO - IEEE Transactions on Dielectrics and Electrical Insulation

JF - IEEE Transactions on Dielectrics and Electrical Insulation

SN - 1070-9878

IS - 2

M1 - 4483467

ER -