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公开(公告)号：US09812819B2
公开(公告)日：2017-11-07
申请号：US14571116
申请日：2014-12-15
发明人： Takashi Kawamoto , Maki Kondou , Ryota Tomiyama , Koji Yamato
IPC分类号： H02H5/00 , H01R13/66 , H01R13/713 , H02H3/08 , H02H5/04
CPC分类号： H01R13/6683 , H01R13/7137 , H02H3/085 , H02H5/043
摘要： A power cord includes a plug and a load connection portion connected to a load. The plug contains a plurality of plug pins which are respectively inserted in plug pin insertion holes of a power socket and connected to the power socket and a plurality of PTC thermistors, at least one of which is provided for each of the plug pins to detect a temperature of the corresponding plug pin. The PTC thermistors form one series circuit, and the power cord includes a shut-off device which turns off power supply to the load connection portion from the plug pins when a resistance value of the series circuit is equal to or higher than a predetermined value.
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公开(公告)号：US10367346B2
公开(公告)日：2019-07-30
申请号：US15501537
申请日：2015-02-26
发明人： Naoki Fukuo , Koji Yamato , Hideki Kawahara
摘要： The electric leakage protection device (feed control device includes an electric leakage detector, an electric leakage protector, and a self leakage generator. The electric leakage detector outputs an electric leakage detection signal when a current leaked from a main circuit exceeds a threshold value. The electric leakage protector opens a contact device interposed in the main circuit when receiving the electric leakage detection signal. The self leakage generator includes; a first short circuit having a first electric resistance component and a first switch component electrically connected in series with each other, and a second short circuit having a second electric resistance component and a second switch component electrically connected in series with each other. The first short circuit and the second short circuit are electrically connected in parallel with each other with regard to a pair of power supply paths constituting the main circuit.
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