Hazardous voltage protector for telephone line

Details Hazardous voltage protector for telephone line Hazardous voltage protector for telephone line

1977-12-29

1979-05-22

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 45, 361 60, H02H 328

Patent

active

041562631

ABSTRACT:
In order to prevent excessive voltages originating in customer owned terminal equipment from creating a hazardous condition in an associated telephone line, a protective circuit is connected between the equipment and the line. This circuit responds to an unbalanced current flow by disconnecting the equipment from the line and providing a local path to ground for the current. The circuit remains activated as long as the unbalanced current flow continues and reconnects the equipment to the line only when the current flow ceases.

REFERENCES:
patent: 3213321 (1965-10-01), Dalziel

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