To accurately measure and assess the electrical contact state of GIS conductive connected component

the method for measuring the loop resistance of conductive connected component by means of kiloampere grade impact current generated by super capacitors was employed. It was proposed that the change rate of the loop resistance with increasing current cab be taken as a criterion for the assessment of electrical contact state of GIS. Verification tests were conducted for some typical standard GIS conductive rods and GIS substations. The results show that the assessment method of GIS electrical contact state by means of kiloampere grade impact current is feasible and effective

and it can better reflect the electrical contact properties of conductive connected component compared to conventional DC voltage drop method.