Electrical transmission or interconnection systems – Switching systems – With operation facilitating feature
Patent
1993-07-23
1996-06-04
Wong, Peter S.
Electrical transmission or interconnection systems
Switching systems
With operation facilitating feature
361 3, H01H 160
Patent
active
055236332
ABSTRACT:
Disclosed is a corrosion preventing circuit for a switch which, even if a large current switch is used for a small current system such as an electronic unit, can improve long-term durability of the switch in a manner similar to the present level without increasing the burden on the system side, thereby ensuring the reliability of devices belonging to the system. A series circuit consisting of a switching means and a current limiting resistor is connected in parallel to a resistor that is connected in series between a dc power supply and a large current switch. A control circuit turns on the switching means by generating a pulse of a predetermined time width after a predetermined time in accordance with the turning on of the large current switch. The current flowing while the switching means is being turned on is applied to the large current switch, so that an oxide film formed at the contact of the switch is destroyed.
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Ashiya Hiroyuki
Imaizumi Nobuhiro
Souda Osamu
Suzuki Masataka
Watanabe Masashi
Krishnan Aditya
Wong Peter S.
Yazaki -Corporation
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