High dielectric constant stress control material

Abstract

This invention relates to a high dielectric constant stress control material characterizing that its mass composition includes: raw rubber: 100, stearic acid: 0.5-1.2, nm-ZnO: 5-10, TiO2: 6-10, olefin oil: 15-25, carbon black: 20-30, coupler: 2-3, sulfur: 2-3, dioxide DIPB: 3-4, accelerant TMTD: 2-3, and mixing and injection molding technics are applied to process it, which is advantaged that it can be prepared to a resistance-capacitance stress tube to control the stress of the cut place of shield of the cable to alter the potential distribution of the cable insulation surface so as to uniform the electric field and the break through phenomenon will not happen since field strength of this place is uniformly distributed.

Description

technical field

[0001] The invention relates to a high dielectric constant stress control material, which is mainly used in stress control units of 6-35KV cable accessories. It belongs to the field of material technology. Background technique

[0002] Because there is electric field distortion at the shielding cut-off place of the cable terminal and the shielding and insulation cut-off place of the cable intermediate joint, controlling the distribution and intensity of the electric field at this place is the core content of the design of the cable accessories. The current method of dealing with the field strength at the cable shield is mainly to use a stress cone (made of semi-conductive material) to equalize the field strength. The stress cone extends the cut-off part of the insulating shielding layer to make the zero potential form a trumpet shape, which improves the electric field distribution of the insulating shielding layer, reduces the possibility of corona generatio...