Electrical transmission or interconnection systems – Switching systems
Patent
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.
Boon Julien
Vandevoorde Jean-Claude
Gaffin Jeffrey
Siemens Aktiengesellschaft
Zura Peter
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