Charging and discharging currents in composite polyamide dielectrics

Sussi, M.A.; Raju, Gorur Govinda

doi:10.1109/ceidp.1992.283239

Cited by 3 publications

(2 citation statements)

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“…The discharging current flows in the opposite direction to the charging current, decays rapidly during the first hundred seconds with a tendency to a stabilisation around zero value. This current evolution may be due to a dipole reorientation or/and a charge detrapping mechanisms [5,10,11,14]. The charging current reduced by the steadystate current is not the mirror image of the discharging current indicate a build up of space charge in the sample.…”

Section: B Discharging Currentmentioning

confidence: 93%

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Thermal aging effect on charging and discharging currents in polymers under DC stress

Moudoud¹,

Megherbi²,

Mekious³

et al. 2008

Conference Record of the 2008 IEEE International Symposium on Electrical Insulation

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An experimental investigation of the charging and discharging currents in polypropylene and polystyrene under 1000 V DC stress were presented. The results showed a distinct difference between the charging and discharging currents. As known, the charging current after the DC voltage application decreases rapidly during the first hundred seconds then approached a stabilisation. The discharging current flowing in the opposite direction of the charging current was observed. It was concluded that space charge have formed in the sample. The charging and discharging currents for both the polypropylene and the polystyrene increased with increasing thermal aging time at 80 °C. It was established that the rise in the current depends on the thermal aging time which induces anomalous discharging current flowing in the same direction as the applied field.

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Section: B Discharging Currentmentioning

confidence: 93%

“…The time depending charging and the discharging currents I(t) is defined by the Curie-von Schweidler law and may be expressed as I(t) = A(T) t -n , where t is the time after the application or removal of the external field, A(T) denotes the temperature dependent factor and n is a constant with a value near unity [1,[9][10][11][12]14].…”

Section: Introductionmentioning

confidence: 99%