Air Force Airman 1st Class Nicolas Artura, 31st Civil Engineer Squadron electrical systems apprentice, shuts off the power to a medium voltage circuit breaker during a scheduled outage of a substation at Aviano Air Base, Italy, June 21, 2022. The frequency of inspection, maintenance and testing for circuit breakers should be one to three years, dependent upon the severity of duty encountered by the circuit breaker.

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Photo credit: © Operation 2022 / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 31, breaker, cemirt, circuit, fw, maintenance, substation, usafe