Automatic reclosing circuit breaker using controllable feeder tr

Details Automatic reclosing circuit breaker using controllable feeder tr Automatic reclosing circuit breaker using controllable feeder tr

1993-11-17

1996-07-09

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

324522, 324601, 361 60, G01R 3100, H02H 1100

Patent

active

055347827

ABSTRACT:
Automatic reclosing apparatus for a DC feeder circuit breaker connectable between a main power bus and a feeder line, including a transducer connectable to the feeder line and a return bus for producing an output signal that corresponds to voltage on the feeder line; and a programmable controller connectable to the breaker for reclosing the breaker when a fault condition is absent and for preventing breaker closure when a fault condition is present; the controller being coupled to the transducer for detecting zero offset and full scale calibration of the transducer output signal. The apparatus can also determine negative return voltage and use such determination to improve accuracy of a load measurement test. The zero offset and full scale calibration functions can be used to implement open and short circuit tests of the apparatus.

REFERENCES:
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patent: 4454555 (1984-06-01), DeLacy
patent: 4999730 (1991-03-01), Pickard
patent: 5029039 (1991-07-01), Yeh
IMPulse NC Inc. "Innovative Motion Power"Product Bulletin Undated.

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