Physical mechanism of deterioration in EPDM insulators placed in 33kV transmission lines

R.R. MOCELLINI; G.I. ZELADA-LAMBRI; J.A. CANO; O.A. LAMBRI; C.L. MATTEO; P.A. SORICHETTI

Buenos Aires

Congreso; Congreso Internacional De Distribución Eléctrica (CIDEL); 2006

In the present work we have studied structure changes in EPDM (ethylene-propylene-diene monomer) subjected to "in situ" outdoor High-Voltage ageing conditions in an active transmission line at 33 kV. Aged samples exhibited a decrease in the degree of crystallinity, determined from dynamical mechanical analysis and dielectric relaxation spectroscopy. In addition the Mocellini’s model which invoke an electro-rheological description of dielectrics was also applied for making clearer the interpretation of the results.