Partial discharge monitoring system for transformers

An apparatus for detecting partial discharge in on-line high voltage electrical equipment containing a dielectric, such as high voltage transformers. The apparatus includes an ultrasonic transducer and an annular capacitive plate for detecting, respectively, the ultrasonic pulse and the radio freque...

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Bibliographic Details
Main Author UNSWORTH JOSEPH
Format Patent
LanguageEnglish
Published 10.08.2004
Edition7
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
RELAYS
SELECTORS
TESTING
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Summary:An apparatus for detecting partial discharge in on-line high voltage electrical equipment containing a dielectric, such as high voltage transformers. The apparatus includes an ultrasonic transducer and an annular capacitive plate for detecting, respectively, the ultrasonic pulse and the radio frequency pulse generated by the occurrence of partial discharge in the equipment. The outputs of the transducers are analyzed by signal processing means to allow determination of occurrences of true partial discharge from the plethora of electrical noise normally present in on-line voltage equipment
Bibliography:Application Number: US20020070251