Watthour meter open potential circuit detecting device

Details Watthour meter open potential circuit detecting device Watthour meter open potential circuit detecting device

1989-11-01

1991-05-21

Wieder, Kenneth

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324110, 324529, 340637, G01R 3106

Patent

active

050178776

ABSTRACT:
There is described a magnetic field detecting device having a pickup coil surrounding a tee shape core of magnetic material which is packaged in a housing having external indicia to indicate location and orientation of the magnetic core. A battery operated voltage sensitive relay circuit activates an audible annunciator when the pickup coil is placed adjacent a current-carrying potential coil in a polyphase watthour meter. Scanning the watthour meter with the device placed against the meter glass housing serves to reveal an open circuited potential coil.

REFERENCES:
patent: 1569299 (1926-01-01), Preston
patent: 1960848 (1934-05-01), Jones
patent: 2103179 (1937-12-01), Rennau
patent: 3487306 (1969-12-01), Harmer

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