Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1979-01-17
1981-09-29
Moore, David K.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 66, G01R 3102
Patent
active
042925851
ABSTRACT:
A three wire leakage current testing circuit for determining the operational performance of ground fault circuit interrupter devices has parallel tripping leads connected to the output of a potentiometer adjustable to line voltage. One lead includes resistors, a potentiometer adjustable within a selected milliampere range and a milliammeter. The other lead has a timer the readout of which is digital and in terms of milliseconds. The leads are switch controlled so that one lead may be closed independently of the other or both leads may be closed simultaneously. The testing circuit may be plugged into or connected to an energized ground fault interrupter receptacle or circuit breaker and it includes switch controlled leads in which an external ground fault circuit interrupter device may be incorporated, the testing circuit then plugged into a conventional three wire outlet. The circuit also includes a section enabling other tests to be made such as voltage, polarity, circuit ground resistance and leakage tests to be made of a portable tool.
REFERENCES:
patent: 3784903 (1974-01-01), Thomas
patent: 3878458 (1975-04-01), Muska
patent: 3898557 (1975-08-01), Strock
patent: 4135129 (1979-01-01), Johnston et al.
LandOfFree
Leakage current testing circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Leakage current testing circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Leakage current testing circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1236145