Thermal endurance tests have been carried out on low voltage cable specimens insulated with two PVC-based compounds. Specimens have been aged at three test temperatures (110, 120 and 130 degrees C) with the induced-current method. A proof-test procedure, based on withstand-voltage tests, has been chosen for determining specimen times to the end-point. During thermal aging some physical quantities - i.e. permittivity, loss factor, dissipation factor and AC volume resistivity - that characterize the dielectric properties of electrical insulation, have been monitored for investigating their trend with thermal aging and thus the effects of thermal degradation. Test results are analyzed and discussed in detail in order to highlight the possible chemical modifications occurring within the polymer matrix as an effect of high temperature.
Investigation on thermal endurance of PVC compounds for low voltage cable insulation / Marzinotto, Massimo; G., Mazzanti; MAZZETTI DI PIETRALATA, Carlo; Pompili, Massimo; C., Santulli; P., Schiaffino. - STAMPA. - (2007), pp. 49-52. (Intervento presentato al convegno Annual Conference on Electrical Insulation and Dielectric Phenomena tenutosi a Vancouver, CANADA nel OCT 14-17, 2007) [10.1109/ceidp.2007.4451498].
Investigation on thermal endurance of PVC compounds for low voltage cable insulation
MARZINOTTO, MASSIMO;MAZZETTI DI PIETRALATA, Carlo;POMPILI, Massimo;
2007
Abstract
Thermal endurance tests have been carried out on low voltage cable specimens insulated with two PVC-based compounds. Specimens have been aged at three test temperatures (110, 120 and 130 degrees C) with the induced-current method. A proof-test procedure, based on withstand-voltage tests, has been chosen for determining specimen times to the end-point. During thermal aging some physical quantities - i.e. permittivity, loss factor, dissipation factor and AC volume resistivity - that characterize the dielectric properties of electrical insulation, have been monitored for investigating their trend with thermal aging and thus the effects of thermal degradation. Test results are analyzed and discussed in detail in order to highlight the possible chemical modifications occurring within the polymer matrix as an effect of high temperature.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
