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Vibration analysis for diagnostic testing of circuit-breakers

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4 Author(s)
Runde, M. ; Norwegian Electr. Power Res. Inst., Trondheim, Norway ; Ottesen, G.E. ; Skyberg, B. ; Ohlen, M.

In order to assess the feasibility of vibration analysis for the diagnostic testing of high-voltage circuit breakers, a comprehensive field test program has been carried out. Vibration patterns from 31 breakers (93 identical single-phase units) have been acquired, compared and analyzed. The breakers were assumed to be in good condition with no known irregularities at the time of testing. However, several serious faults, including an incipient rupture of the contact plug shaft, an incorrectly assembled crank, and major lubrication problems were disclosed. Thus, this “blind test” performed under realistic conditions on circuit breakers in normal service demonstrates that vibration analysis can be a reliable and suitable tool for noninvasive diagnostic testing

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Power Delivery, IEEE Transactions on  (Volume:11 ,  Issue: 4 )