Title:
事故電流高速検出回路
Document Type and Number:
Japanese Patent JP5695158
Kind Code:
B2
Abstract:
The fault current detecting circuit includes: a current detection unit (200) that outputs a current detection signal; a first comparing circuit unit (300) that compares the current detection signal with a predetermined reference current value and outputs a first output signal; a differentiator (400) that differentiates the current detection signal to output a change slope of the current detection signal; a second comparing circuit unit (500) that compares the change slope with a predetermined reference change slope value and outputs a second output signal; a third comparing circuit unit (700) that compares the current detection signal with a predetermined current detection limit reference value and outputs a third output signal; and a trip determining unit (600) 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.
Inventors:
Bang Sung Hyun
Park Haeyoung
Lee Kyung Ho
Sim Chun Wook
Choi Won Jun
Kim Minji
Park Haeyoung
Lee Kyung Ho
Sim Chun Wook
Choi Won Jun
Kim Minji
Application Number:
JP2013215577A
Publication Date:
April 01, 2015
Filing Date:
October 16, 2013
Export Citation:
Assignee:
LSIS CO.,LTD.
International Classes:
H01H83/02; H01H83/20; H02H3/08
Domestic Patent References:
| JP2002095149A |
Foreign References:
| US5361184 |
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tomohiro Minamiyama
Akira Kawai
Kenichi Nakamura
Jun Tsuruta
Tomohiro Minamiyama
Akira Kawai
Kenichi Nakamura