Advanced science.  Applied technology.


Method for Utilizing a Spherical Dipole Probe for Detecting Faults in High Voltage Transmission Line Insulators: 4,758,792


A method is provided for utilizing a nonintrusive, noncontacting electric field sensing device to detect faults in high voltage transmission line insulators. The electric field surrounding an unfaulted insulator is mapped using a spherical dipole to obtain a characteristic reference curve. The field of a suspect insulator is then mapped to obtain a test curve which is compared with the reference curve to determine the existence of and location of a fault.

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James J. Polonis; John P. Harrell; Melvin J. Johnson