摘要
针对不均匀电场(棒-板间隙)中绝缘板上残余电荷对50％冲击闪络电压U_(50)的影响做了一些试验研究。研究结果表明:在绝缘板上施加不同的电压,板面上将残余不同的电荷;当残余电荷达到一定量时,对U_(50)将有很大的影响;多次施加电压时,积累的残余电荷对U_(50)的影响更大,且使其分散性变大,不易得到真实的U_(50)值.
The effect of charges remaining on a dielectric plate upon the 50% impulse surface flashover voltage U_(50) in the non-uniform field(rod-plane gap)is investigated. The results of research show that the amounts of residual charges on a dielectric plate vary with the values of voltage upon it. The residual charges effect much upon the U_(50) when they get to some values. Accumulating residual-charges have more effects upon U_(50), and make dispersity of U_(50) become wide. So it is not easy to get the true value of U_(50).
