Hits:

Indexed by:期刊论文

Date of Publication:2017-01-02

Journal:RESEARCH IN NONDESTRUCTIVE EVALUATION

Included Journals:SCIE、EI

Volume:28

Issue:1

Page Number:45-59

ISSN No.:0934-9847

Key Words:Dielectric response; elongation at break retention rate; ethylene propylene rubber; remaining life; time-temperature shift

Abstract:In order to analyze the aging of the active Ethylene-Propylene Rubber (EPR) cable, the dielectric dissipation factor (tan ) was proposed as a nondestructive method of cable insulation condition assessment. Firstly, the EPR marine cable was investigated in this article, and the data of elongation at break retention rate (EAB%) after accelerated aging under different temperatures were used to fit by means of the optimized time-temperature shift factor. The endpoint judgment index of dielectric dissipation factor was deduced when EAB% reached to 50%. Secondly, the cable's lifetime calculated by tan was compared with the EAB% in order to confirm the accuracy of the method. The results show that the lifetime of tan is consistent with EAB% and provides a new method for the rapid evaluation of the EPR cable's remaining life.