Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1989-12-26
1992-02-04
Pellinen, A. D.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307 85, H02J 900
Patent
active
050862359
ABSTRACT:
A power supply switchover device is provided for electrical apparatus such as teleaction terminal equipment. A switching circuit puts a storage battery into and out of use by connecting it to at least one supply terminal of the electrical apparatus to which another source is also connected. A control circuit causes the switching circuit to connect the storage battery when the supply terminal falls to a predetermined potential as furnished by the power supply, and a blocking circuit acts on the control circuit to initiate disconnection of the storage battery, when and as long as said terminal is at a potential that is lower than a determined threshold value.
REFERENCES:
patent: 4354118 (1982-10-01), Spencer
patent: 4560841 (1985-12-01), Pierrel
patent: 4647787 (1987-03-01), Pommer, II
patent: 4677311 (1987-06-01), Morita
patent: 4779007 (1988-10-01), Schlanger et al.
patent: 4807102 (1989-02-01), Serras-Paulet
patent: 4851756 (1989-07-01), Schaller et al.
Electronic Engineering, vol. 51, No. 624, Jun. 1979, London, Great Britain, T. Austin, "No-Break Battery Back-Up with Automatic Shut-Off".
Marquet Alain
Tanguy Jacques
Alcatel Cit
Gaffin Jeffrey A.
Pellinen A. D.
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