Assessment of the State of Electrical Insulation by Measuring Isothermal Relaxation Current

Experimental data on measurements of isothermal relaxation current (IRC) are presented for different kinds of industrial electrical insulation: cross-linked polyethylene (XLPE) 6-kV power cables and thermosetting insulation for the stator windings of high-power rotation machinery. The ageing of and...

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Bibliographic Details
Published in:Power technology and engineering 2018, Vol.52 (1), p.95-101
Main Author: Kononenko, A. I.
Format: Article
Language:English
Subjects:
Charge distribution
Coils (windings)
Cross-linked polyethylene
Current distribution
Damage assessment
Electric cables
Electrical insulation
Electrical Machines and Networks
Energy
Energy Systems
Foundations
Geoengineering
Hydraulics
Indicators
Insulation
Power cables
Power Electronics
Renewable and Green Energy
Rotating machinery
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Summary:Experimental data on measurements of isothermal relaxation current (IRC) are presented for different kinds of industrial electrical insulation: cross-linked polyethylene (XLPE) 6-kV power cables and thermosetting insulation for the stator windings of high-power rotation machinery. The ageing of and damage to electrical insulation was assessed using indicators derived from the so-called distributed charge current. An analysis of the experimental data shows that the IRC method is highly sensitive for detection of incipient defects in these insulating materials and can be used to determine the indicators of ageing in XLPE insulation and their initial and limiting values.
ISSN:1570-145X
1570-1468
DOI:10.1007/s10749-018-0916-2