1.dust control, among the factors that cause partial discharge, foreign matter and dust are very important incentives. Whether it is metal or non-metallic dust, will produce a concentrated electric field, so that the initial discharge voltage insulation down, breakdown voltage decreases. Therefore, the transformer manufacturing process, should maintain a clean environment.
2.insulation materials focus on processing, insulation is very taboo with metal dust, because once the insulation pieces attached to metal dust, completely clean up is very difficult. It is therefore necessary to unify the central processing in the insulation workshop and to set up a machining area which should be kept isolated from other areas of dust production.
3.lead use cold pressure terminal, the use of lead cold pressure terminal form is an effective measure to reduce the local discharge. Because the use of phosphorous copper produce a lot of splash welding slag, easy to scattered in the power transformer body and insulation.
4.the seal of the tank and parts, the structure of the seal is directly related to the leakage of the transformer. If there is leakage, there will be water into the transformer inside, resulting in transformer oil and other insulation parts of the moisture absorption, which is one of the factors of partial discharge. So ensure that the sealing performance is reasonable.
