Transformer cascade for powering electronics on high voltage tra

Details Transformer cascade for powering electronics on high voltage tra Transformer cascade for powering electronics on high voltage tra

1977-02-10

1978-05-02

Hix, L. T.

Electrical transmission or interconnection systems

Miscellaneous systems

340310A, 336173, 324127, 323 77, H02J 1300

Patent

active

040877019

ABSTRACT:
Power for electronic instrumentation on high voltage transmission lines is provided through a high efficiency cascade of ferrite core transformers operating in the superaudio range. An array of tuning capacitors is provided to neutralize the leakage inductance in each transformer primary and thus present a resistive input impedance throughout the cascade. Unequal turns ratios in the transformers may also be utilized to provide constant resistance, and therefore nearly constant voltage and current along the cascade.
The transformers in a voltage grading network are optimally enclosed within a cylindrical insulator and a dielectric medium, for example, oil or SF.sub.6.

REFERENCES:
patent: 3571658 (1971-03-01), Knoth
patent: 3943435 (1976-03-01), DeJarnette
patent: 4012733 (1977-03-01), Whyte

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