Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1978-03-02
1979-05-29
Krawczewicz, Stanley T.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 62, 324127, G01R 2700
Patent
active
041568427
ABSTRACT:
A system for measuring the transfer immitances, impedance and admittance, a linear electrical network having one or more ports. The system utilizes clamp-on ferromagnetic cores to electromagnetically couple the transfer immitance measuring system to the electrical network without having to interrupt the normal on-line operation of the electrical network. A high frequency injection network, which includes a high frequency signal generator and a multichannel amplifier, injects a high frequency signal into each of the ports of the electrical network. High frequency voltage and current measuring networks are electromagnetically coupled to each of the ports of the electrical network to measure the high frequency component of the port voltage and the port current. By adjusting the relative amplitude and phase of each of the injected high frequency signals, open- and closed-circuit conditions, in the high frequency range, can be simulated in the ports of the electrical network, permitting the transfer immitances of the electrical network to be established without interrupting normal, on-line operation.
REFERENCES:
patent: 3582774 (1971-06-01), Forgacs
patent: 3771057 (1973-11-01), Persidok
patent: 3818331 (1974-06-01), Schlosser
patent: 3818332 (1974-06-01), Schlosser
patent: 4023095 (1977-05-01), Walters
Brooks James L.
Huang Kwang Ta
Shiroma Dallas M.
Krawczewicz Stanley T.
Sciascia Richard S.
St. Amand Joseph M.
The United States of America as represented by the Secretary of
Viger Andrew S.
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