Circuit protection arrangement

Details Circuit protection arrangement Circuit protection arrangement

1993-04-08

1997-04-29

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 54, H02H 300

Patent

active

056255195

ABSTRACT:
A circuit protection arrangement comprises a series switching circuit that is intended to be connected in a line of the circuit and will switch to an open state when subjected to an overcurrent, and a shunt switching circuit that is open under normal operating conditions but will shunt the overcurrent across the load of the circuit or to ground when triggered by the series switching circuit. Preferably the series switching circuit comprises a switching transistor (4) that is controlled by a control transistor (6), and the shunt switching circuit comprises a shunt switching transistor (9) that is controlled by a shunt control transistor (11) which is itself controlled by the series switching circuit. The shunt switching circuit may be connected to ground or it may be connected to a back-up load or voltage foldback device such as a triac.

REFERENCES:
patent: 3617655 (1971-11-01), Fischer
patent: 3801872 (1974-04-01), Zocholl et al.
patent: 3916220 (1975-10-01), Roveti
patent: 4110809 (1978-08-01), Cronin
patent: 4202023 (1980-05-01), Sears
patent: 4241372 (1980-12-01), Sears
patent: 4423457 (1983-12-01), Brajder
patent: 4491892 (1985-01-01), Lehmann et al.
patent: 4513343 (1985-04-01), Ryczek
patent: 4533970 (1985-08-01), Brown
patent: 4536699 (1985-08-01), Baker
patent: 4562454 (1985-12-01), Schultz et al.
patent: 4594633 (1986-06-01), Townsend et al.
patent: 4603234 (1986-07-01), Huet et al.
patent: 4604674 (1986-08-01), Hamel
patent: 4661879 (1987-04-01), Sato et al.
patent: 4723190 (1988-02-01), Chung
patent: 4736268 (1988-04-01), Wagoner
patent: 4744369 (1988-05-01), Kroll
patent: 4771357 (1988-09-01), Lorincz et al.
patent: 4799126 (1989-01-01), Kruse et al.
patent: 4811156 (1989-03-01), Kroll
patent: 4835649 (1989-05-01), Salerno
patent: 4853820 (1989-08-01), Ham et al.
patent: 4937697 (1990-06-01), Edwards et al.
patent: 4991051 (1991-02-01), Hung
patent: 5095261 (1992-03-01), Schoofs
patent: 5319515 (1994-06-01), Pryor et al.
British Search Report, GB 9022237.3, Jan. 25, 1991.
British Search Report, GB 9022236.5, Jan. 25, 1991.
International Search Report, PCT/GB91/01760, Jan. 21, 1992.
John Markus, Electronic Circuit Manual, p. 595, McGraw-Hill Book Company, New York, 1971.
Erich Gelder and Walter Hirschmann, Siemens Fachbucher, Circuits with Semiconductor Components, vol. 4 pp. 199-202, 1970; a translation of this document is attached.
"Using UC3840 in Designing a Switching Power Supply", Collection of Transistor Circuit Manufacturing, pp. 150-161.
"Switching Mode Power Supply", pp. 52-62.
Horst van Pelka, Siemens-Bauteile-Informationen, vol. 4, No. 6, 1968, p. 106 (right column).
"Various Types of Power Supply Protection Circuits", Switching Power Supply Units, Chapter 8, (pp. 209-229).

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