Power switching device in an electrical power distribution...

Details Power switching device in an electrical power distribution... Power switching device in an electrical power distribution...

2005-04-12

2005-04-12

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

C361S103000

Reexamination Certificate

active

06879477

ABSTRACT:
A power switching device in an electrical power distribution system on board a helicopter. There is a power switching device that switches on or off the power flow from a main distributor to the consumer. This switching device comprises an overhead panel with a switching means. This device improves the functional safety of electrical and electronic devices in the helicopter by reducing the electromagnetic influence without increasing the weight of the shielding technology and without requiring additional space in the helicopter airframe. With this device there is at least one fuse panel that is in electrical communication with a main distributor. The main distributor has an electrically protective switch which is connected to a power supply connection and a consumer connection. The electronic protective switch is controllable by a control unit which is connected to a control switch on the overhead panel via a fiber optic cable. This control switch receives a control signal from a base light emitter via an additional fiber optic cable. This light emitter detects the voltage at the power supply connection and forms the control signal.

REFERENCES:
patent: 4292502 (1981-09-01), Adams
patent: 4814579 (1989-03-01), Mathis et al.
patent: 5457757 (1995-10-01), Kidder
patent: 5544842 (1996-08-01), Smith et al.
patent: 6522542 (2003-02-01), Gordon et al.

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