Switch-off device for airport series circuits

Details Switch-off device for airport series circuits Switch-off device for airport series circuits

1998-05-18

1999-09-14

Gaffin, Jeffrey

Electrical transmission or interconnection systems

Switching systems

307139, 307149, 307154, 200 1R, H01H 104, H02B 124

Patent

active

059527374

ABSTRACT:
A switch-off device for airport series circuits (2) has input terminals (3, 4) which are connected to a current source (1). It also has output terminals (5, 6) which are connected to a series circuit (2) and connecting elements (7, 8) by means of which the input terminals (3, 4) and the output terminals (5, 6) can be connected to one another. The switch-off device has an actuator (11) for the purpose of simplifying operation and permitting a plurality of different, clearly visible operating states. In a normal position, the actuator positions the connecting elements (7, 8) such that each input terminal (3, 4) is connected to an output terminal (5, 6). In a service position, it positions the connecting elements (7, 8) so that the input terminals (3, 4) are disconnected from the output terminals (5, 6) and are connected to a grounding terminal (9), while the output terminals (5, 6) are connected to one another and to the grounding terminal (9). In a testing position, the actuator positions the connecting elements (7, 8) in such a way that the input terminals (3, 4) are disconnected from the output terminals (5, 6) and are connected to the grounding terminal (9), and the output terminals (5, 6) are connected to one another and to a test terminal (10).

REFERENCES:
patent: 3718783 (1973-02-01), Kemenczky
patent: 4076971 (1978-02-01), Mukaemachi et al.
patent: 4652706 (1987-03-01), Rao et al.
patent: 5525769 (1996-06-01), Anderson
patent: 5708309 (1998-01-01), Kubo
patent: 5828277 (1998-10-01), Duchemin
Series Plug Cutout, ADB Aviation Lighting Systems, Apr. 1987, 2pgs.

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