Electricity: power supply or regulation systems – Remote sensing
Patent
1975-03-13
1976-06-08
Goldberg, Gerald
Electricity: power supply or regulation systems
Remote sensing
323 44R, 323 88, 324123C, 324127, G01R 1900
Patent
active
RE0288519
ABSTRACT:
A current transformer and transresistance amplifier are combined; the secondary winding of the current transformer being connected to the input of the transresistance amplifier and being virtually short-circuited because of the very low input impedance of the transresistance amplifier. The transresistance amplifier, nevertheless, supplies an output voltage which is proportional to current in the primary winding of the current transformer. An output voltage is developed from the current in the secondary winding. An important advantage, among others, of the subject combination is that a current transformer having considerably lower volt-ampere capacity may be employed. A current transformer employed alone for the same purpose would have to have a much larger volt-ampere capacity.
REFERENCES:
patent: 2981888 (1961-04-01), White, Jr.
patent: 3199043 (1965-08-01), Hinrichs
patent: 3524135 (1970-08-01), Nercessian
patent: 3617878 (1971-11-01), Senour
patent: 3714545 (1973-01-01), Chiffert
patent: 3733538 (1973-05-01), Kernick et al.
Basic Electrical Measurements, by M. B. Stout; Prentice-Hall, Inc., 1961; 2nd Printing, pp. 397-413.
Kepco Power Supply Handbook - P. Birman; 1966; Cat. No. TK 451 k4B5 (Sci. Lib. of PTO), pp. 31-39.
General Electric Company
Goldberg Gerald
Myles Vale P.
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