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Sensor to Monitor Health of Metal Oxide Arresters

Abstract: 

A sensor to monitor health of surge arresters such as metal oxide arresters is disclosed. The sensor including a housing; a sensor assembly contained in the housing, and a voltage measurement strap extending around a periphery of the housing. The voltage measurement strap being electrically connected to the electronics board and configured to measure voltage using electric field. The sensor assembly including: an electronics board to receive, transmit, process, and store signals; a Rogowski coil electrically connected to the electronics board to measure surge currents diverted by the surge arrestor; and a current transformer electrically connected to the electronics board to measure leakage current. 

Patent Number: 
10,209,293
Date Of Issue: 
02/19/2019
Inventors: 

Andrew John Phillips; Christiaan Engelbrecht; Robert Carlton Lynch; J. Mark Major