Condition assessment of power equipment is the basis for

power equipment condition maintenance and operation risk prediction. As an important device in the power system

vacuum circuit breakers need to be accurately evaluated in order to ensure their safe and stable operation. In view of the current vacuum circuit breaker state evaluation

the single state index weight and the complex evaluation model are insufficient. This paper takes the ZN63A-12 vacuum circuit breaker as the research object and proposes a method based on combined weighting and weighted rank sum ratio (

WRSR

) combined comprehensive evaluation method. First

establish a state evaluation system by selecting four characteristic state indicators of the vacuum circuit breaker. Secondly

use the combination weighting method to calculate the weight of each indicator. then

according to the measured data

use the weighted rank sum ratio method to perform the evaluation of the six vacuum circuit breakers. Sort by stages and evaluate their status; finally

compare the results of the evaluation using this method with the results of the expert on-site evaluation to verify the effectiveness of the method. The research results show that the method in this paper can sort the states of multiple vacuum circuit breakers

and formulate maintenance strategies based on this

which effectively improves the maintenance efficiency.