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Vibration signature monitoring
Moving parts in circuit breakers are subjected to high stress and damping so each one has its unique vibration signature as each individual part will contribute to the overall vibration waveform.
A circuit breaker is a very complex mechanical mechanism. It has a huge variety parts including springs, lever arms, sheet metal, pivots, rubber stops, contacts, and many other such items. This means that the vibration signature of a circuit breaker will be very complex.