Patent ID: 11867763
Assignee: ABB SCHWEIZ AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for monitoring condition of a fleet of circuit breakers, including:
measuring at least one type of operating condition related signal for each respective circuit breaker in the fleet of circuit breakers during their operation;
obtaining a set of feature data corresponding to data extracted from circuit breakers in the fleet of circuit breakers representing respective measurements of operating condition related signals for the fleet of circuit breakers;
performing cluster analysis of the set of feature data obtained from the fleet of circuit breakers based on grouping the fleet of circuit breakers into one or more clusters and based on a similarity threshold;
identifying an abnormally operating circuit breaker from the other circuit breakers in the fleet of circuit breakers based on the cluster analysis; and
generating a signal indicating a condition of the fleet of circuit breakers based on a cluster number resulted from the cluster analysis performed on the fleet of circuit breakers;
wherein the measuring of the at least one type of operating condition related signal for each respective circuit breaker in the fleet of circuit breakers are substantially synchronously performed;
wherein the abnormally operating circuit breaker is identified by comparing the feature data of the abnormal circuit breaker with the feature data of the other circuit breakers in a cluster of the one or more clusters;
wherein the signal indicates an abnormal condition of the fleet of circuit breakers where a cluster number is above one;
wherein the signal's indication of the abnormal condition includes identifying the abnormally operating circuit breaker as abnormal where the set of feature data representing its operating condition related signal was grouped in a cluster having a less number of feature data than at least one of a rest of the one or more clusters;
wherein the cluster number is representative of the number of feature data in the set of feature data;
wherein the at least one type of operating condition related signal is selected from the group consisting of a travel curve signal, a vibration signal, a coil current signal, a motor current signal, and a PD signal of the respective circuit breaker.