防潮问题极为重要。各种有机绝缘材料在受潮后都将严重恶化其电绝缘性能,甚至危及使用寿命。本文主要介绍有机绝缘材料的吸湿概念;表征吸湿特性的系数h、D和P;以致影响这些系数的各种因素。 Moisture is extremely important. A variety of organic insulating materials in the damp will seriously deteriorate the electrical insulation properties, and even endanger the service life. This article focuses on the hygroscopic concept of organic insulating materials; the factors h, D and P that characterize hygroscopic properties; and the various factors that affect these coefficients.