发明授权
- 专利标题: Fault current detecting circuit
- 专利标题(中): 故障电流检测电路
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申请号: US14051269申请日: 2013-10-10
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公开(公告)号: US09093838B2公开(公告)日: 2015-07-28
- 发明人: Seung Hyun Bang , Hae Yong Park , Gyeong Ho Lee , Jung Wook Sim , Won Joon Choe , Min Jee Kim
- 申请人: LSIS CO., LTD.
- 申请人地址: KR Anyang-Si, Gyeonggi-Do
- 专利权人: LSIS Co., Ltd.
- 当前专利权人: LSIS Co., Ltd.
- 当前专利权人地址: KR Anyang-Si, Gyeonggi-Do
- 代理机构: Lee, Hong, Degerman, Kang & Waimey
- 优先权: KR10-2012-0121510 20121030
- 主分类号: G01R31/02
- IPC分类号: G01R31/02 ; H02H3/44 ; H02H3/093 ; H02H9/02
摘要:
The fault current detecting circuit includes: a current detection unit that outputs a current detection signal; a first comparing circuit unit that compares the current detection signal with a predetermined reference current value and outputs a first output signal; a differentiator that differentiates the current detection signal to output a change slope of the current detection signal; a second comparing circuit unit that compares the change slope with a predetermined reference change slope value and outputs a second output signal; a third comparing circuit unit that compares the current detection signal with a predetermined current detection limit reference value and output a third output signal; and a trip determining unit that outputs a trip control signal only when the first output signal and the second output signal are maintained to be received and the third output signal is not received.
公开/授权文献
- US20140118001A1 FAULT CURRENT DETECTING CIRCUIT 公开/授权日:2014-05-01