Sleeve dielectric loss measuring method

The invention discloses a sleeve dielectric loss measuring method. The sleeve comprises a conducting rod, a capacitor core and an insulating shell which are arranged in sequence; the capacitor core comprises capacitive screens which are arranged along the radial direction; the bushing dielectric loss measurement method comprises the following steps: carrying out low-insulation treatment on the outer surface of the insulating shell; constructing a dielectric loss measurement balance bridge; the conducting rod is connected with a power line of the dielectric loss measurement balance bridge, and the power line inputs a preset voltage source; the tail capacitive screen is connected with a test line of the dielectric loss measurement balance bridge; when the dielectric loss measurement balance bridge is balanced, determining the dielectric loss value of the sleeve according to the parameters of the dielectric loss measurement balance bridge; wherein the dielectric loss measurement balance bridge parameters compris