Electrical insulation oil and preparation thereof

Abstract

This invention is related to an electric insulating oil and preparation method, which have low pour point and excellent hydrogen absorbency even if not using the pour inhibitor that can worsen the electric performance, and prevent the insulative damage caused by the upward floating when the moisture content mixed inside the transformer is frozen, such that the flash point is higher and the fatalness of occurring fire is lower. And this invention has no causticity to the copper because of without having the sulfur and has excellent electric performance, so that the practicality is excellent. The electric insulating oil is characterized that: the pour point is not greater than 45 below zero; the kenematic viscosity (40 degrees centigrade) is 6mm (2) to 10 mm (2); the flash point (PM) is not smaller than 135 degrees centigrade; the density (20 degrees centigrade) is not greater than 0.895kg / L; the aniline point is 63 to 90 degrees centigrade; the sulfur content is less than 3 weight ppm; the nitrogen content is not greater than 3 weight ppm; the basic nitrogen content is not greater than 1 weight ppm; the aromatic series content is not smaller than 5 weight%; and the antioxidant of 0.05 weight% to 0.5 weight% is contained.

Description

technical field [0001] The present invention relates to a kind of electric insulation oil and its manufacturing method, especially relates to a low pour point, suitable for cold areas, but high flash point, and because it contains almost no sulfur, so it is completely non-corrosive to copper, An electrical insulating oil having excellent oxidation stability and therefore excellent practical performance, and a method for producing the same. Background technique [0002] Electrical insulating oil is filled and used in high-voltage electrical equipment such as transformers, high-voltage cables, high-voltage circuit breakers, and capacitors. In these electrical appliances, transformers, etc. are designed in such a way that the electrical insulating oil is circulated and cooled by forced or natural convection in order to dissipate the heat generated by the coil, etc. At this time, the cooling of the electrical insulating oil with low kinematic viscosity Excellent performance. H...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of existing electrical insulating oil and its manufacturing method, and provide a new electrical insulating oil and its manufacturing method. The technical problem to be solved is to make it even without using The deteriorating pour point depressant has a low pour point and excellent hydrogen absorption, which can prevent insulation damage caused by the freezing and floating of moisture mixed in the transformer. Because of the high flash point, the risk of fire is low, and further Because it contains almost no sulfur, it is completely non-corrosive to copper, has excellent electrical properties, and has excellent practical performance

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