This paper describes the effects of molecular structure and physicochemical characteristics on the impulse pre-breakdown phenomena in perfluoro liquids under non-uniform field. The test liquids were two types of PFPE (perfluoro polyether) with different molecular weight, D40 and XAD, and one type of PFC (perfluoro carbon), FC40. An impulse voltage was applied to a needle electrode, and the streamer generated at the needle tip was photographed using a shadowgraph optical system combined with an image converter camera (ICC). The characteristics of streamers in D40 were different compared to those in XAD and FC40. These experimental results show that the effect of viscosity plays an important role in perfluoro liquids rather than molecular structure.
The characteristics of streamers in perfluoro liquids / K., Miyano; K., Yamazawa; Pompili, Massimo; MAZZETTI DI PIETRALATA, Carlo; H., Yamashita. - STAMPA. - 2:(1997), pp. 640-643. (Intervento presentato al convegno Annual Conference on Electrical Insulation and Dielectric Phenomena tenutosi a Minneapolis, MN, USA nel 19-22 Ottobre 1997) [10.1109/CEIDP.1997.641156].
The characteristics of streamers in perfluoro liquids
POMPILI, Massimo;MAZZETTI DI PIETRALATA, Carlo;
1997
Abstract
This paper describes the effects of molecular structure and physicochemical characteristics on the impulse pre-breakdown phenomena in perfluoro liquids under non-uniform field. The test liquids were two types of PFPE (perfluoro polyether) with different molecular weight, D40 and XAD, and one type of PFC (perfluoro carbon), FC40. An impulse voltage was applied to a needle electrode, and the streamer generated at the needle tip was photographed using a shadowgraph optical system combined with an image converter camera (ICC). The characteristics of streamers in D40 were different compared to those in XAD and FC40. These experimental results show that the effect of viscosity plays an important role in perfluoro liquids rather than molecular structure.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
