INTERFACE PUNCTURING-PROOF ELECTRIC MULTIPLE UNIT CAR-ROOF COMPOSITE INSULATOR

摘要

An interface breakdown-proof locomotive roof composite insulator. The composite insulator comprises: a support body; and at least five shed groups arranged side by side along the axial direction that are provided around the sidewall of the support body, the at least five shed groups includes: at least four shed groups located on the upper end with each group including a large shed and a small shed; and at least one shed group located on the undermost end with each group including two small sheds. For such a shed structure, it is favorable to tolerate impulse voltage, and it is difficult for the interface to be broken down; the electric field on the interface even does not exceed 3kV/mm, and even if a gas exists on the interface, it will not break through the interface.