Abstract In order to analyze the cable insulation state,a nondestructive assessment method is proposed by using the retention rate of hardness as the rapid detection characteristic parameter of the cable remaining life.In this paper,the ethylene propylene rubber (EPR) marine cable is investigated.Firstly,the data of the retention rate of hardness after accelerated aging under different temperatures are used to fit,by means of the optimized time-temperature shift factor.And the cable remaining life is calculated by extrapolation of the Arrhenius equation under different end levels and temperatures.Secondly,the lifetime calculated by the retention rate of hardness is compared with that by the retention rate of elongation at break (EAB %) in order to confirm the accuracy of the method.The results show that the retention rate of hardness is consistent with EAB% and provides a new way for rapid evaluation of cable’s remaining life.
Meng Xiaokai,Wang Zhiqiang,Li Guofeng. Rapid Assessment of Marine Cable Remaining Life Based on Retention Rate of Hardness[J]. Transactions of China Electrotechnical Society, 2016, 31(15): 197-203.
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2016, Vol. 31 
