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Content available Ocena jakości wykonania izolacji maszyn WN na podstawie pomiarów niskoczęstotliwościowych
Subocz J.
Maszyny Elektryczne : zeszyty problemowe
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2007
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Nr 76
101-107
EN
This paper presents degradation mechanism of epoxy-mica-glass insulation and influence of service conditions on kinetics of this mechanism. But the most important factor here is production quality. Basics of dielectric spectroscopy in time and frequency domain were described and application of this method for estimation of HV insulation condition. Research conducted on insulation models showed that good indicators of insulation condition are value of charge and time of relaxation in low frequencies range. There was given an example of FDS measurements application for estimation of quality of technology in postproduction tests. This method is very accurate and allows to identify defective production technology and insulation aged in service.
2
Content available Nowoczesne metody diagnostyki izolacji silników i generatorów WN
Subocz J., Szrot M., Płowucha J.
Maszyny Elektryczne : zeszyty problemowe
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2006
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Nr 74
121-127
EN
This paper presents degradation mechanism of epoxy-mica-glass insulation and influence of service conditions on kinetics of this mechanism. But the most important factor here is production quality. Basics of dielectric spectroscopy in time and frequency domain were described and application of this method for estimation of HV insulation condition. Research conducted on insulation models showed that good indicators of insulation condition are value of charge and time of relaxation in low frequencies range. There was given an example of FDS measurements application for estimation of quality of technology in postproduction tests. Other examples showed classification of HV motors and generators insulation with various periods of service based on FDS method and voltage ramp test. Relaxation processes analysis in low frequencies domain in epoxy-mica-glass insulation has corroborated high conformity of laboratory measurement results of insulation samples with service tests of HV motors. This method is very accurate and allows to identify defective production technology and insulation aged in service.
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