This paper presented the test for bending resistance and twisting resistance of 252 kV post insulators of ceramic material used in Jilin province substation.And try to find the relationships between bending resistance

twisting resistance

sound velocity and component of ceramic material post insulator.Based on the comprehensive analysis of a large number of test results

it is obtained that with the increase in speed of sound

the flexural strength

the probability of high-strength porcelain and torsional strength are increasing.With the increase of Al content in ceramic

there is an increasing trend in the flexural strength and speed of sound

but a certain dispersion is existing.With the increase of Na content

K content in ceramic

there is an decreasing trend in the flexural strength and torsional strength

but is not obviously.