Robert P Mccourt

US Patent:

57173885, Feb 10, 1998

Filed:

Apr 25, 1996

Appl. No.:

8/637497

Inventors:

Mark A. Janoska - Lawrenceville NJ
Paul S. Wong - Burnaby, CA
Robert W. McCourt - Short Hills NJ

Assignee:

Public Service Electric and Gas Company - Newark NJ

International Classification:

G08B 2100

US Classification:

34087016

Abstract:

There is disclosed a methodology for measuring the magnetic field strengths of fundamental and harmonic frequencies associated with a. c. electrical current flows over a protracted period of time; and, particularly, in hostile environments. A preferable application calls for the determination of the field strengths associated with electrical currents flowing in a. c. power, distribution lines of utilities. The monitoring instrument is positioned in relation to the power lines to be monitored, typically at the base of a pole immediately adjacent the pole of the power line or on a power line supporting pole itself. In order to provide for long term, powering of the monitoring device, d. c. power is developed utilizing the a. c. power that is present.