Voltage-dividing insulation cap for DC leakage current test of controllable lightning arrester

The invention discloses a voltage-dividing insulation cap for a DC leakage current test of a controllable lightning arrester. The voltage-dividing insulation cap comprises a voltage-dividing insulation cap body and an inflation chamber located in the voltage-dividing insulation cap body. The bottom of the voltage-dividing insulation cap body is provided with a groove, and the top of the voltage-dividing insulation cap body is a tower-shaped tip. The voltage-dividing insulation cap body comprises an insulation cap top and an insulation cap side part fixedly connected to the lower part of the insulation cap top, and the insulation cap top and the insulation cap side part are integrally formed and manufactured by adopting a silicon rubber material; and the outer sides of the insulating cap top and the insulating cap side parts are folded corrugated surfaces. The voltage dividing insulation cap bears voltage, and the borne voltage value is reduced compared with that of an existing controllable lightning arrester