Electrical apparatus

Details Electrical apparatus Electrical apparatus

1980-09-23

1983-11-15

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 49, 324 51, 340650, 340652, H02H 316

Patent

active

044159447

ABSTRACT:
An earth proving device which includes a solid state relay employing a light emitting diode and photoconductor pair operating on low current/low voltage. Operation of the solid state relay is followed by operation of electromagnetically-operable switches which control electrical connections of a power supply to an electrically-operated apparatus to allow passage of a higher current therethrough. Thus, the earth proving device protects the apparatus by first providing indications of the state of the circuit and earth connections to the apparatus with a low current/low voltage sensing signal before the application of power level current and voltage thereto.

REFERENCES:
patent: 2207202 (1940-07-01), La Deau
patent: 3426342 (1969-02-01), De Langis
patent: 3515942 (1970-06-01), Gordon
patent: 3766434 (1973-10-01), Sherman
patent: 3905373 (1975-09-01), Gonser
patent: 3965395 (1976-06-01), Young
patent: 4011483 (1977-03-01), Meadows
patent: 4110807 (1978-08-01), Neuhouser
patent: 4122854 (1978-10-01), Blackett

Affiliated with

Also associated with

Rating

Electrical apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrical apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrical apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-162162