Load totalizing blocked throwover control

Details Load totalizing blocked throwover control Load totalizing blocked throwover control

1989-02-23

1991-04-16

Pellinen, A. D.

Electrical transmission or interconnection systems

Plural load circuit systems

Plural sources of supply

307 18, 307 83, 307 86, H02J 304, H02J 338

Patent

active

050085603

ABSTRACT:
An electric utility sub-station having two transformers which transmit electric energy to customers in different service areas. A throwover is provided which is operative, when a failure occurs in one transformer, to switch the load normally carried by the failed transformer over to the other transformer which then carries the load of both transformers. Operation of the throwover is blocked when the total demand load on both transformers exceeds the capacity of either transformer.

REFERENCES:
patent: 3317741 (1967-05-01), McClain
patent: 3422276 (1969-01-01), Sullivan
patent: 3934155 (1976-01-01), Galitsyn
patent: 4110808 (1978-08-01), Hobson, Jr. et al.
patent: 4403292 (1983-09-01), Ejzak et al.

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