抄録
It has been proposed that vapor-mist dielectrics in which mixing liquid droplets such as tetrachloroethlene in a gas have an ability of increasing flashover, impulse voltage, and of suppressing partial discharge. Vapor-mist methods have been performed on other materials and the effect of the mist can also be obtained on benzen, hexan, and even if water as general materials. Although these studies have been carried out, neither the discharge mechanism on vapor-mist nor the reason for the increase of the discharge voltage is fully understood. Because the mist have various size. On the other hand, agglomeration of water molecules can be studied with FT-IR method, and are classified into monomer, dimmer, trimmer (including polymer). Water give mist stats which are significant to discuss on effects.
This paper describes states of water mist and the effect of them under non-uniform field with positive and negative polarities. Water mist in vapor exist as dimmer and trimmer, and the amount of them decrease with the reduction of temperature. These mist have no effect on discharge suppression. When the mists, however, are formed by space charges, the inception voltage is increased by these mists in the negative polarity.
