Impedance arrangement for limiting transients

Electricity: electrical systems and devices – Safety and protection of systems and devices – Impedance insertion

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361 11, H02H 900

Patent

active

048191205

ABSTRACT:
An impedance arrangement is provided for use in a high-voltage circuit. For example, the impedance arrangement is useful in a circuit which includes reactance elements and a high-voltage circuit-switching device. The impedance arrangement limits transient inrush current and/or voltages in a first frequency range which occur in the circuit during closure of the circuit-switching device and damps transients in a second frequency range which occur in the circuit during opening of the circuit-switching device. The impedance arrangement is also useful in applications requiring tuning reactors and current-limiting to limit abnormal power-frequency currents, harmonics, transients, and/or high-frequency inrush currents. The impedance arrangement functions predominantly as an inductive impedance over a first frequency range; e.g., corresponding to the frequencies of transients encountered during the closing of a circuit-switching device. Additionally, the impedance arrangement functions predominantly as a resistance over a second frequency range which is higher than the first frequency range; e.g., corresponding to the frequencies of transient conditions on a power system such as are encountered during the opening of the circuit-switching device. The impedance arrangement comprises a first winding having a first predetermined inductance and a second winding connected in parallel with the first winding. The second winding has a second predetermined inductance and a second predetermined resistance. The second winding is wound with respect to the first winding in an opposite sense to the first winding and so as to define a predetermined mutual inductance between the first and second inductances.

REFERENCES:
patent: 3376475 (1968-04-01), Greber
patent: 3614530 (1971-10-01), Baltensperger
patent: 3697773 (1971-10-01), Reitan et al.
patent: 3836819 (1973-08-01), Clausing
patent: 3912975 (1975-10-01), Knauer et al.
patent: 3927350 (1975-12-01), McConnell
patent: 4110806 (1978-08-01), Murano et al.
patent: 4184186 (1980-01-01), Barkan
patent: 4191986 (1980-03-01), ta Huang et al.
patent: 4405965 (1983-09-01), Weldon et al.
patent: 4523249 (1985-06-01), Arimoto
patent: 4550356 (1985-10-01), Takahashi
patent: 4567538 (1986-01-01), Arimoto et al.
patent: 4695918 (1987-09-01), O'Leary
IEEE Paper No. 865M 419-6, "Capacitor Switching and Transformer Transients", by B. S. Bayless, J. D. Selman, D. E. Truax, and W. E. Reid, 8 pages, 1986.

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