On the Issue of Periodicity of Non-Destructive Examination of Urban Electric Cable Lines

The article deals with determining of periodicity of non-destructive examination of urban electric cable lines. As a criterion to select the periodicity of examination of cable lines a complex reliability indicator, technical readiness coefficient Ktesrf is applied which takes into account self-repairing failures. This coefficient gives the most profound description of the current state of the cable line in terms of its operational reliability. By constantly monitoring the dynamics of Ktesrf changes and taking into account current statistical data, one can schedule a well-timed examination of the cable line. By setting the standard values of Ktesrf and monitoring its dynamics based on statistical data of cable line failures and taking into account the category of consumers reliability, one can promptly assign deadlines for line diagnostics.