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1. (WO2018083840) OVERCURRENT DETECTION DEVICE AND BREAKER IN WHICH SAME IS USED

Pub. No.:    WO/2018/083840    International Application No.:    PCT/JP2017/025576
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Fri Jul 14 01:59:59 CEST 2017
IPC: H01H 71/74
H01H 73/36
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: KAI, Takayuki
甲斐 孝幸
MORI, Mitsugi
森 貢
Title: OVERCURRENT DETECTION DEVICE AND BREAKER IN WHICH SAME IS USED
Abstract:
Provided is an overcurrent detection device (1) with which it is possible, when varying the rated current value, to reduce the effect of an imbalance in the proportion of change in the magnetic flux, without varying the internal configuration of the overcurrent detection device (1). The overcurrent detection device (1) is provided with: a fixed yoke (4); a movable yoke (5) for which the gap length, which is the distance to the fixed yoke (4), can be varied; a movable core (3) disposed so as to be movable in the axial direction; a conductor (8) to which a current is supplied; a movable iron (2); and an adjustment spring (10) serving as a load adjustment mechanism. The invention is characterized in that the movable iron (2) is rotatably provided to the fixed yoke (4), and the adjustment spring (10) is provided so as to impel the movable iron (2) in the direction in which attraction towards the movable core (3) is blocked, the impelling force on the movable iron (2) being variable in accordance with the gap length.