In order to study the tracking and erosion resistance of composite insulation material under special filthy conditions

we simulated the site operation for composite materials under special contaminant conditions in the laboratory

and proposed a new method of accelerating aging test for evaluating the tracking and erosion resistance（called plane method for short）

in which a certain proportion of diatomite

Na Cl

carbon and nickel powder was mixed and adopted to coat the surface of sample so as to simulate special filthy conditions.The plane method period takes only 15 min for applying voltage. According to the sample level resisted to electrical erosion

we evaluated its performance by levels for 6

1

0 k V. Through numerous experiments

we analyzed the mechanism of materials surface erosion process. The results show that the plane method is stricter than the inclined plane method

and it has better discrimi

nation too. Therefore

the new method is recommended to evaluate the tracking and erosion resistance for modifying and formulating relevant standards reference.