Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor
Patent
1980-03-11
1981-08-18
Caldwell, Sr., John W.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific voltage responsive fault sensor
323248, 340645, 340662, 361 79, 363 75, H02H 320, G08B 2100
Patent
active
042850231
ABSTRACT:
A rectifier unit for supplying power to a D.C. load including a transformer having a primary, a secondary and a saturable core, the secondary defining an output section and a control section. A ferroresonance control circuit simulates saturation of the transformer core and includes an electronic switch for controlling the degree of simulated core saturation and thereby regulating the rectifier unit output. Rectifier failure alarm circuitry produces a failure alarm in response to a number of rectifier unit malfunctions. The rectifier failure alarm circuitry is coupled to the ferroresonance control circuitry and comprises a rectifier alarm element operable between the first condition wherein a rectifier failure alarm is produced and a second condition. The failure alarm element is operated from its first condition when the electronic switch minimizes the rectifier system output. The failure alarm element is provided with power from the secondary output section so that, if this output section fails to produce power, a rectifier failure alarm is also produced.
REFERENCES:
patent: 2574374 (1951-11-01), Bivens
patent: 3047848 (1962-07-01), Johnson
patent: 3222575 (1965-12-01), Dexter
patent: 3590362 (1971-06-01), Kakalec
patent: 3626248 (1971-12-01), Bartlett
patent: 3816809 (1974-06-01), Kuster
patent: 3824449 (1974-07-01), Hase
patent: 3894280 (1975-07-01), Bishop et al.
patent: 4068157 (1978-01-01), Bassett
patent: 4159514 (1979-06-01), Kakalec
Subsection 1.1, pp. 1-8, Subsection 1.2, pp. 1-8, Subsection 1.3, pp. 1-3 from "1979 Telecommunications Power Equipment Seminar", published by Lorain Products Corporation.
Caldwell Sr. John W.
Lorain Products Corporation
Myer Daniel
Raney Linn J.
Rickin Michael M.
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