Suspension end insulation structure with transformer coil inserted with shielding wire

Abstract

The invention discloses a suspension end insulation structure with a transformer coil inserted with a shielding wire. The suspension end insulation structure comprises a coil current carrying wire and a coil shielding wire distributed at an interval. An end part of the coil shielding wire is connected to a paperboard strip; aluminum metallization crepe papers are covered at outer sides of a suspension end of the coil shielding wire and the contact part of the coil shielding wire and the paperboard strip; a Denison paper is covered at the outer side of the paperboard strip; and the suspension end of the coil shielding wire is in a round corner structure. The invention has the advantages that an existing shielding suspension end which is not treated or is subjected to simple wrapping is changed into a standard insulation structure, so that a local discharge initial voltage at the suspension end is effectively increased, simultaneously the electric field intensity of two adjacent oil conduits at the shielding suspension end and a horizontal oil conduit size between two adjacent shielding suspension ends are reduced; the service life of the transformer is prolonged; and the production cost is lowered.

Description

technical field [0001] The invention relates to a floating end insulation structure in which a transformer coil is inserted into a shielding wire, which belongs to the transformer inner shielding-continuous coil shielding wire suspension end insulation structure, and belongs to an insulation wrapping structure. Background technique [0002] At this stage, due to the more stringent requirements of users on the partial discharge, service life and reliability of transformers, and the overhang of shielded wires is one of the reasons for the increase in partial discharge and the increase in the size of the adjacent two-wire cake oil passage, in order to control the local To ensure that the electric field strength of the adjacent wire cake shielding suspension end is within the allowable field strength range, it is necessary to thicken the turn insulation thickness of the current-carrying wire and shielding wire and the size of the adjacent shielding suspension end oil pass...

AI Technical Summary

Problems solved by technology

As a result, the volume of the transformer increases, raw materials are wasted, and reliability is not easy to guarantee

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