Comparison of diagnostic methods for thermal aging of shipboard cable

Abstract

This paper proposes a comparison of two methods for diagnosing the insulation condition of ship power cables that are subject to accelerated aging at elevated temperatures. Earlier, an express methodology was presented for checking ship cables by measuring the hardness of insulation of conductors and the hose sheath with a device according to the Shore method, which makes it possible to estimate the service life of cable routes without dismantling them. The methodology was tested on fishing vessels and was taken into account by the Russian Maritime Register of Shipping. However, any applied diagnostic methods are not without faults due to interference and errors, and therefore cannot provide a reliable control result. To increase the reliability of the audit of various electrical equipment and ship cables, it is advisable to control other parameters characterizing the technical condition of the facility. One of these parameters is the dielectric loss tangent (tanδ), which can be measured with the Tangens 2000 instrument. The article presents the results of measuring the insulation hardness and loss tangent during thermal aging of a ship cable KNRE 2x1, and a comparison of two methods for assessing the condition and service life of a cable.