Personnel protection system for electrical power connections

Details Personnel protection system for electrical power connections Personnel protection system for electrical power connections

1991-11-14

1993-12-14

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 44, H02H 328

Patent

active

052708969

ABSTRACT:
A personnel protection system for electrical connections is disclosed, which is of the type that differentially senses the current flow between the power lead and the return lead (or between two power loads) is provided with an unbalancing impedance which makes the current difference between the two leads sufficiently high to trip the device and cause the power to be disconnected. A utilization device is similarly provided with an imbalanced impedance. However, that impedance is calculated to counteract the current imbalance caused by the first impedance, so that when the cable is connected to the utilization device, the current balance between the two conductors is restored, and power connection is maintained in the cable. Thus, the system does not provide continuous power unless predetermined conditions considered safe for securing the power are fully satisfied.

REFERENCES:
patent: 3697809 (1972-10-01), Self
patent: 3886409 (1975-05-01), Scarpino
patent: 4056837 (1977-11-01), Misencik
patent: 4138707 (1979-02-01), Gross

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