Electric power system with line failure detection

Details Electric power system with line failure detection Electric power system with line failure detection

1990-10-30

1993-03-23

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

340660, 363 51, 361 92, G08B 2100

Patent

active

051968320

ABSTRACT:
An electric power circuit with line voltage failure detection includes a pair of DC conductors for receiving a DC voltage, a capacitor connected across these conductors, and a main power converter connected to produce an output voltage on a main power bus in response to the DC voltage on the power conductors. A circuit branch connected across the power conductors includes the series connection of a primary winding of a transformer and a switching device. The switching device is operated to produce a series of voltage pulses across the secondary winding of the transformer. These voltage pulses are used to produce a second output voltage. The magnitude of these voltage pulses which occur during time when the switching device is off, is detected and a line failure indicating signal is produced when this magnitude falls below a predetermined value.

REFERENCES:
patent: 4415960 (1983-11-01), Clark, Jr.
patent: 4554501 (1985-11-01), Baker
patent: 4694193 (1987-09-01), Schlenk et al.
patent: 4761726 (1988-08-01), Brown

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