Method and apparatus for transferring between electrical power s

Details Method and apparatus for transferring between electrical power s Method and apparatus for transferring between electrical power s

1995-10-25

1997-06-03

Martin, David S.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 87, 307 89, 361159, H01H 4700

Patent

active

056357729

ABSTRACT:
Transfer between alternative electrical power sources for highly inductive loads, such as motors, is made using an open transition with the load connected to the new source only after the voltage on the load bus has fallen below a predetermined value, preferably a value which is about 30% or less of the nominal source voltage.

REFERENCES:
patent: 4488058 (1984-12-01), Cheffer
patent: 4490768 (1984-12-01), Mori et al.
patent: 4638175 (1987-01-01), Bradford et al.
patent: 4672227 (1987-06-01), Lagree
patent: 4686375 (1987-08-01), Gottfried
patent: 4695738 (1987-09-01), Wilmot
patent: 4703191 (1987-10-01), Ferguson
patent: 4879624 (1989-11-01), Jones et al.
patent: 5210685 (1993-05-01), Rosa

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