Analysis of Surface Tracking of Micro and Nano Size Alumina Filled Silicone Rubber for High Voltage AC Transmission

� Abstract�-�Thispaperdiscussestheexperimentalresultsinanefforttounderstandthetrackingand� erosionresistanceofthemicroandnanosizeAl2O3�filledsiliconerubber�(SIR)�materialwhichhas� beenstudiedundertheACvoltages,�withammoniumchlorideasacontaminant,�asperIEC�60587�test� procedures.�Thecharacteristicchangesinthetrackingresistanceofthemicroandnanosizefilled� specimenswereanalyzedthroughleakagecurrentmeasurementandtheerodedmasseswereusedto� evaluatetherelativeerosionandtrackingresistanceofthecomposites.�Thefundamental,�thirdandfifth� harmonicoftheleakagecurrentduringthetrackingstudywereanalyzedusingmovingaveragecurrent� technique.�Itwasobservedthattheharmoniccomponentsofleakagecurrentshowgoodcorrelation� withthetrackinganderosionresistanceofthematerial.�Thethermogravimetry��derivativethermo� gravimetric�(TGDTG)�studieswereperformedtounderstandthethermaldegradationofthe� composites.�Thephysicalandchemicalstudieswerecarriedoutbyusingscanningelectronmicroscope� (SEM),�EnergyDispersiveXrayanalysis�(EDAX)�andFourierTransformInfrared�(FTIR)� Spectroscopy.�TheobtainedresultindicatedthattheperformanceofnanofilledSIRwasbetterthanthe� microfilledSIRmaterialwhenthe�%�wt.�offillerincreased.�

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