Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1983-05-25
1985-01-08
Pellinen, A. D.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
361 44, 361 46, 361 84, 361 77, 363 63, H02H 326
Patent
active
044928785
ABSTRACT:
An electrical apparatus that is adapted to be connected between a source of alternating current supply and a load is designed to achieve automatic correction of hot and neutral lines at the output should the supply lines at the input be reversed, and is arranged to be utilized in connection with a ground wire. To achieve the result, a change-over switch is provided in each of the phase wires and a logic circuit is provided for operating the switch, the logic circuit being arranged to detect a voltage change between one of the phase wires and the ground wire so that when a voltage change is detected, the logic circuit will energize the switch to reverse the connection of the supply lines to the load. Two types of change-over switches are disclosed, one in the form of a relay and the other in the form of solid state triacs.
REFERENCES:
patent: 2870380 (1959-01-01), Rocha
patent: 3713011 (1973-01-01), Johnson et al.
patent: 3764885 (1973-10-01), Buxbaum et al.
patent: 3944891 (1976-03-01), McDonald et al.
patent: 3947859 (1976-03-01), Menmuir et al.
patent: 4031431 (1977-06-01), Gross
patent: 4087846 (1978-05-01), Hughes et al.
Jennings Derek
Pellinen A. D.
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