| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the following problems: when fixing on a bottom plate of a distribution board, a conventional current detector needs to secure a space for attachment thereof, and a wiring attachment work thereof takes time and effort. <P>SOLUTION: A magnetic core 37 is arranged on an apparatus terminal metal fitting 26 of a breaker 21 for wiring, a conductor 32 is inserted into a through-hole 37b of the magnetic core 37, the conductor 32 is fastened between an apparatus terminal metal fitting 26 and a crimp terminal fitting 24 connected to the metal fitting 26 by using a terminal screw 25, the magnetic core 37 is therefore held between the apparatus terminal metal fitting 26 and the crimp terminal fitting 24. Thus, a current detector 31 is attached to the breaker 21 for wiring. In this condition, magnetic flux generates at the magnetic core 37 caused by a current flowing a current path that is formed by the conductor 32 and the terminal screw 25. By detecting the magnetic flux using a current sensor 33 at a gap 37a of the magnetic core 37, a current flowing between the apparatus terminal metal fitting 26 and the crimp terminal fitting 24 is detected. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
