Cable outer sheath deterioration state evaluation method and related device

The invention discloses a cable outer sheath degradation state evaluation method and a related device. The method comprises the steps of measuring the insulation resistance of a crosslinked polyethylene cable outer sheath, measuring the elongation at break of the crosslinked polyethylene cable outer sheath, calculating an electromechanical evaluation factor alpha of the cable outer sheath, and determining the degradation state of the cable sheath through the electromechanical evaluation factor alpha. According to the method, the insulation resistance and the elongation at break of the outer sheath of the XLPE cable are measured, the degradation state of the outer sheath of the XLPE cable is evaluated by the computer electrical evaluation factor, the method is accurate in evaluation, the degradation state of the outer sheath of the XLPE cable can be well evaluated, a basis is provided for a maintainer to determine the service condition of the cable, and the service life of the cable is prolonged. By timely rep