Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1977-01-10
1979-05-29
Rolinec, Rudolph V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324 51, 324102, 361 31, G01R 3106, G01R 3102
Patent
active
041568460
ABSTRACT:
A method is provided for detecting the presence of arcing faults in the stator windings of large dynamoelectric machines, such as turbine generators. Arcing faults, such as broken strands in a winding conductor with continued arcing, give rise to high frequency currents which flow in the neutral lead of the generator winding. The presence of the arcing fault can thus be detected by observing the high frequency neutral currents and monitoring them for the presence of the characteristic frequency distribution resulting from the resonance characteristics of the current path.
REFERENCES:
patent: 2640100 (1953-05-01), Packer et al.
Roumainis, S. J.; "The Null Point..."; AIEE Transactions; Apr. 1956; pp. 147-152.
Fort Emil M.
Harrold Ronald T.
Pietsch Herbert E.
Karlsen Ernest F.
Rolinec Rudolph V.
Telfer G. H.
Westinghouse Electric Corp.
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