Spare transformer connecting means

Details Spare transformer connecting means Spare transformer connecting means

1975-08-06

1978-03-07

Hohauser, Herman

Electrical transmission or interconnection systems

Plural load circuit systems

Transformer connections

307112, H02J 300

Patent

active

RE0295698

ABSTRACT:
Discloses a power system in which three single phase transformers have their primary windings connected in delta to a 3-phase isolated phase bus. Switching means is provided for connecting a spare transformer to said bus as a replacement for any one of said single phase transformers. Special interlocking means assures that the spare transformer is connected to the bus in the same manner as the transformer it replaces.

REFERENCES:
patent: 2229531 (1941-01-01), Tornquist
patent: 2747142 (1956-05-01), Kradel et al.
patent: 3041464 (1962-06-01), Pritchett
General Electric I.D. #ww 6389600, labeled Exhibit A, approximate date 1949 (System suppled to Pacific Gas & Electric Co. around 1949).

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