Electrical connection sentry system

Details Electrical connection sentry system Electrical connection sentry system

1988-11-21

1989-06-27

Envall, Jr., Roy N.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 49, 361100, 361102, 307 99, 307326, 340652, 340656, 324133, 324508, 174 5SG, H02H 304, H02H 510

Patent

active

048435147

ABSTRACT:
Positive assurance of correct connection, in supplying electrical utilization equipment from a current source, is provided when it is critical to safety and particularly when receptacle outlets are used or a fixed wiring installation required which may be subject to wiring error. An electromagnetic relay is employed to prevent equipment use and to provide audible indication in the event of hazardous connective error such as reversal of ungrounded and grounded neutral conductors and the omission of a grounding connection. The relay may be one that is also otherwise controlled for on-off power switching.

REFERENCES:
patent: 3242382 (1966-03-01), Rogers, Sr.
patent: 3407336 (1968-10-01), Embree
patent: 3809961 (1974-05-01), Kershaw
patent: 3864581 (1975-02-01), Satyanarayana
patent: 4346419 (1982-08-01), Janniello
patent: 4447844 (1984-05-01), Schossow et al.
patent: 4707759 (1987-11-01), Bodkin
patent: 4709293 (1987-11-01), Gershen et al.

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