H - Electricity – 01 – H
Patent
H - Electricity
01
H
H01H 50/54 (2006.01) H02J 1/00 (2006.01) B64D 47/00 (2006.01)
Patent
CA 2740180
In one aspect, the present invention provides an electromagnetic circuit interrupter (100) for use in a high voltage direct current (DC) aircraft power distribution system. The electromagnetic circuit interrupter (100) comprises a contact mechanism (102) operable to separate first and second electrical contacts (120, 130) by a first predetermined distance d1 for a predetermined time .tau. so as to sustain an arc (150) when the contact mechanism (102) is opened. The contact mechanism (102) is further operable to separate the first and second electrical contacts (120, 130) by a second predetermined distance d2 after the predetermined time .tau. so as to extinguish the arc (150). The first predetermined distance d1 is less than said second predetermined distance d2. By deliberately sustaining the arc (150) for a relatively long period of time, this aspect of the present invention is particularly useful for extending the operational lifetime of the contacts (120, 130) and thereby of the electromagnetic circuit interrupter (100) itself.
Craig Wilson And Company
Ge Aviation Systems Limited
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