H - Electricity – 02 – H
Patent
H - Electricity
02
H
321/78
H02H 7/125 (2006.01) G05F 1/38 (2006.01) H02H 3/20 (2006.01) H02J 9/06 (2006.01)
Patent
CA 1149017
RECTIFIER SYSTEM WITH FAILURE ALARM CIRCUITRY Abstract A rectifier unit is disclosed 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.
371490
Reliance Electric Company
Ridout & Maybee Llp
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