Circuit for verifying correct connections to a three-wire dual v

Details Circuit for verifying correct connections to a three-wire dual v Circuit for verifying correct connections to a three-wire dual v

1974-04-03

1976-03-16

Miller, J. D.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

317 27R, 317 33SC, 324 86, 307127, 340223, 317 18D, H02H 326

Patent

active

039448916

ABSTRACT:
Circuitry is utilized to interconnect loads to the power distribution system and only conducts current when voltage conditions from the system are appropriate. Therefore, the load is deenergized whenever reversed connections are made to the power distribution system, or whenever an open circuit exists in any line thereof. Latching means can be included in the circuitry to continually energize the load when an open circuit develops in either nongrounded or hot line of the power distribution system after the load has been initially energized therefrom. Furthermore, the effect of the latching means is externally controlled through a switching means so that remote circuit conditions can be synchronized therewith. When an indicating means is incorporated as the load, the circuitry functions as a detector and when the circuitry is utilized with a circuit breaker to deenergize the load, ground fault protection can be incorporated therewith.

REFERENCES:
patent: 2687512 (1954-08-01), Miller et al.
patent: 2989698 (1961-06-01), Bennett
patent: 3248610 (1966-04-01), Faglie
patent: 3364363 (1968-01-01), Iordanidis
patent: 3431467 (1969-03-01), Calfee
patent: 3548259 (1970-12-01), McDonald
patent: 3596137 (1971-07-01), Kirsch
patent: 3611050 (1971-10-01), Weber
patent: 3681636 (1972-08-01), Calfee
patent: 3764904 (1973-10-01), Drexler

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