Power transformer insulating layer and preparation method thereof

Abstract

The invention discloses a power transformer insulating layer and a preparation method thereof. The power transformer insulating layer comprises an inner insulating layer and an outer insulating layerfrom inside to outside, the inner insulating layer comprises the following components: 52 to 68 parts by weight of an ethylene-tetrafluoroethylene copolymer, 2 to 26 parts by weight of an ethylene-octene copolymer, 10 to 24 parts by weight of butadiene styrene rubber, 15 to 22 parts by weight of linear low density polyethylene, 21 to 32 parts by weight of a flame retardant, 0.1 to 0.8 part by weight of an antioxidant, 0.5 to 0.8 part by weight of a vulcanizing agent, 1.6 to 2.8 parts by weight of a cross-linking agent, 0.4 to 0.9 part by weight of an antistatic agent and 5 to 8 parts by weightof glassy carbon; the outer insulating layer comprises the following components: 4 to 18 parts of calcium silicate, 26 to 58 parts by weight of industrial ointment, 12 to 34 parts by weight of boronnitride, 2 to 25 parts by weight of molybdenum dioxide, 6 to 22 parts by weight of graphite and 1 to 9 parts by weight of titanium dioxide. The insulating property can be improved, and the power transformer insulating layer has elasticity and flexibility, so that the power transformer insulating layer is more practical.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a method for preparing an insulating layer of a power transformer. Background technique [0002] A transformer is a static electrical device used to convert AC voltage and current to transmit AC power. It is based on the principle of electromagnetic induction to achieve electrical energy transfer. Transformers can be divided into power transformers, test transformers, instrument transformers and special-purpose transformers in terms of their uses; the power transformer is a static electrical device that is used to convert a certain value of AC voltage (current) into frequency The same other or several voltage (current) devices with different values ​​are also necessary equipment for power transmission and distribution, and power distribution for power users. [0003] Setting the insulating layer on the power transmission and transformation equipment is a sharp tool to i...

AI Technical Summary

Problems solved by technology

However, with the continuous improvement of voltage levels, the existing silicone rubber materials have technical problems such as electrical leakage caused by high-voltage thermal expansion and insufficient flame retardancy, which lead to potential safety hazards in power transmission and transformation equipment.

Since the power transformer is an important power transmission equipment, its performance is very important, especially the insulation performance, which is more related to the safety of its use. With the extension of the service life of the current insulation layer, the insulation cannot be effectively guaranteed. , causing safety hazards