Ground fault protection for electrical power distribution system

Details Ground fault protection for electrical power distribution system Ground fault protection for electrical power distribution system

1974-11-25

1977-01-04

Caldwell, John W.

Communications: electrical

Systems

Call station

317 18A, 317 18B, G08B 2100

Patent

active

040018040

ABSTRACT:
Ground fault protection for an electrical installation is provided by isolating from neutral the service entry box and the raceways and conduits forming a ground return system connected to the box, and connecting a device between the box and neutral which responds to current leakage into the ground return system above a predetermined level by opening a switch in the entry box to interrupt the supply to the system.

REFERENCES:
patent: 2342800 (1944-02-01), Griscom
patent: 3072827 (1963-01-01), Benish
patent: 3315129 (1967-04-01), Fisher
patent: 3609732 (1971-09-01), Kasahara et al.

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