Electrical test methods for nonceramic insulators used for live line replacement

Harmon, R. W.; Karady, G.; Amburgey, O.G.; Gela, G.; Hall, J.F.; Schneider, Hartmut; Burnham, J.T.; McBride, J. R.; Coffeen, L.; Spaulding, Nicole; Carrera, T.; Szilagyi, Z.; Kuffel, J.; Gemignani, R.

doi:10.1109/tdc.1996.545925

Cited by 3 publications

(2 citation statements)

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“…The IEEE Task Force on Electrical Testing of Polymer Insulators for Hot Line Installation investigated electrical testing methods for NCIs used for live-line replacement [7]. This investigation involved testing of transmission NCIs purposely made with internal flaws and then subjected to megger, hot stick, partial discharge and RIV tests as well as measurement of the total and surface component of leakage current, together with surface heating measurement.…”

Section: A Prior Nci Electrical Testing Studymentioning

confidence: 99%

Guidelines for Establishing Diagnostic Procedures for Live-Line Working of Nonceramic Insulators

Carreira

Cherney

Christman³

et al. 2014

IEEE Trans. Power Delivery

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The paper provides a review of the conditions that may be found on new nonceramic insulators (NCIs) and NCIs in service that will affect the live-line working of these insulators as well as conditions that are deemed to be inconsequential to live-line work. The most serious of these conditions are electrical tracking, vandal damage or erosion of the housing exposing the core, any of which may preclude the live-line working of NCIs. Various diagnostic tools and guidelines are reviewed indicating their strengths and limitations. Close-up visual inspection is by far the most dependable method of assessing the condition of NCIs as a necessary first step in contemplating live-line work. Various electrical test practices of NCIs are also reviewed as a means of ensuring safety in live-line change out or installation of NCIs.

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Section: A Prior Nci Electrical Testing Studymentioning

confidence: 99%

Guidelines for Establishing Diagnostic Procedures for Live-Line Working of Nonceramic Insulators

Carreira

Cherney

Christman³

et al. 2014

IEEE Trans. Power Delivery

View full text Add to dashboard Cite

show abstract

“…However, despite all these advantages, composite insulators have suffered in service from different failure modes [1]. Indeed, the overall quality of the composite insulators is strongly dependent on many factors such as the type of filler and the resin matrix [2,3], the interfacial properties [4,5], the polymer surface roughness [6,7] or the manufacturing conditions [8,9]. Besides structural parameters, 7 April 2009. the immediate environmental stresses can also be responsible for the electrical failure of composite insulators.…”

Section: Introductionmentioning

confidence: 99%

Effects of electric partial discharges on the rheological and chemical properties of polymers used in HV composite insulators after railway service

Habas

Arrouy

Perrot³

2009

IEEE Trans. Dielect. Electr. Insul.

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The origin and the consequences of the electric failure of in-service composite hollow insulators used in railway transportation were investigated. Direct electrical measurements made it possible the detection of partial discharges (PD) and UV emissions allowed of identifying the location of the PD at the interface between metal braids and a silicone liner. To investigate the effects of the damaging PD activity, physicochemical properties of the different polymers were investigated and compared to new samples. The thermomechanical properties of the HTV and RTV silicones showed important alterations in the polymers structure. The chemical analyses of the silicones and nitrile rubber conducted using ATR-FTIR spectroscopy revealed that the polymers were oxidized after electrical failure. The results indicated that the ozone production and UV emission were due to the surface electrical activities. The breakdown of alumina trihydrate (ATH) in the inner HTV silicone liner demonstrated that undesired electrical discharges induced an significant increase of temperature and the formation of moisture in the air present in the hollow insulator. Laboratory artificial aging performed on the silicones and nitrile rubber showed similar degradation as in service. Further electrical experiments conducted on empty hollow insulators enabled the detection of internal PD located in micro-voids present in the adhesive used to bond the HTV silicone liner to the inner composite tube.

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Live-line working of non-ceramic insulators

Carreira¹

2014

2014 11th International Conference on Live Maintenance (ICOLIM)

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Electrical test methods for nonceramic insulators used for live line replacement

Cited by 3 publications

References 0 publications

Guidelines for Establishing Diagnostic Procedures for Live-Line Working of Nonceramic Insulators

Guidelines for Establishing Diagnostic Procedures for Live-Line Working of Nonceramic Insulators

Effects of electric partial discharges on the rheological and chemical properties of polymers used in HV composite insulators after railway service

Live-line working of non-ceramic insulators

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