Electric field has a significant effect on the contamination accumulation characteristics of insulators. In order to deeply study the influence of electric field intensity on the contamination accumulation characteristics of glass material

the experiments of artificial contamination accumulation under the windless environment of constant temperature and humidity were carried out in this paper. The relationship between the amount of contamination accumulated to the surface of specimen and the electric field intensity under the AC and DC electric fields was studied. Furthermore

the conclusions were verified by the artificial contamination accumulation tests of glass insulator. Test results are as follows: under AC electric field

the electric field intensity has a negligible effect on the amount of contamination accumulated on the upper surface. Under DC electric field

electric filed promotes the contamination accumulation. There is a critical electric field intensity

when the electric field intensity is higher than the critical intensity

the promoting effect of electric field is gradually weakened. Under positive and negative electric fields

the critical electric field intensities are 2 kV/cm and 1.5 kV/cm

respectively. The influence of electric field on contam-ination characteristics is weakened in a high-humidity environment. The effect of electric field on the contamination accumulation characteristics of specimen is similar to that of insulator.