Electricity: electrical systems and devices – Safety and protection of systems and devices – Arc suppression at switching point
Patent
1977-05-12
1978-07-25
Moose, Jr., Harry E.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Arc suppression at switching point
361 5, 361 6, 361 74, H01H 3359
Patent
active
041033167
ABSTRACT:
Apparatus for preventing the occurrence of possible transient phenomena in the circuit including a power source and its load connected thereto when the supply of electric power from the power source to the load, which has been interrupted, is restarted. The apparatus includes means for detecting the occurrence of the interruption of the power supply and means for memorizing the phase angle of the voltage or current of the power source at the time of the occurrence of the interruption of the power supply to maintain the circuit in off-condition. The apparatus further includes means for detecting the coincidence of the phase angle memorized in the memorizing means with a changing phase angle of voltage or current of the power source after the resupply of the electric power from the source to the load becomes possible whereby, upon detecting the coincidence, resupply of the electric power from the power source to load will be restarted.
REFERENCES:
patent: 3976917 (1976-08-01), Fork
patent: 3990000 (1976-11-01), Digneffe
patent: 4001643 (1977-01-01), Ramberg et al.
Moose Jr. Harry E.
Sanki Denshi Kogyo Kabushiki Kaisha
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