Transformer coil paint-dipping process

Abstract

A transformer winding dip-painting process is provided, which relates to the technical field of the dip painting process of transformer windings. The transformer windings undergo one dip-painting process as the following steps: placing a winding in a dip-painting pot; applying the dip-painting pot with the first-time compression, first-time pressure maintenance, first-time pressure relief, first-time evacuation and the first-time vacuum maintenance after evacuation, vacuum maintenance and painting; applying the dip-painting pot with the second-time compression, second-time pressure maintenance, second-time pressure relief, second-time evacuation and the second-time vacuum maintenance; applying the dip-painting pot with the third-time compression, third-time pressure maintenance, re-painting and third-time pressure relief after the above steps are completed; and finally taking the winding out of the dip-painting pot. The invention is characterized in that the pressure is increased up to 0.5-0.6MPa after the compression button is pressed at the first time and the increased pressure is applied to the dip-painting pot and maintained in the state for 3.5-4.5 hours, the pressure is released to the normal atmospheric pressure after the pressure maintenance is completed; and the pressure is increased up to 0.5-0.6MPa after the compression button is pressed at the second time and maintained in the state for 2.5-3.5 hours, and the pressure is released again to the normal atmospheric pressure after the pressure maintenance is completed.

Description

technical field [0001] The invention relates to the technical field of a transformer coil dipping process. Background technique [0002] In the previous coil dipping process, the coil is first put into the dipping tank, and after vacuuming, vacuuming, and paint transfer, the dipping tank is pressurized for the first time, kept for the first time, and released for the first time. pressure, the first vacuuming, the first vacuuming, and then the second pressurization of the paint tank, the second pressure keeping, the second pressure release, the second vacuuming, and the second vacuuming, After the above process is completed, pressurize the varnish tank for the third time, keep the pressure for the third time, paint back, release the pressure for the third time, and finally take out the coil from the varnish tank. The coil obtained after the above process has the following problems: the coil is not fully dipped in paint, which seriously affects the mechanical strength of the ...

AI Technical Summary

Problems solved by technology

The coil obtained after the above process has the following problems: the coil is not fully dipped in paint, which seriously affects the mechanical strength of the coil and the insulation performance between layers and turns, and limits the three-proof (moisture-proof, salt-spray, mildew-proof) of the product. ) effect, resulting in a large partial discharge