Title:
漏電遮断器
Document Type and Number:
Japanese Patent JP4760428
Kind Code:
B2
Abstract:
The breaker has a filter-and booster assembly (10) provided between a secondary winding of a summation-current transformer (3) and an error current collecting circuit (4). The assembly has an active filter circuit with an operational amplifier that is provided as an amplifier unit with externally added passive filter units. The active filter circuit is provided with an analog circuit and switched from a low pass filter circuit to a band pass filter circuit.
Inventors:
Takahiro Kudo
Shoji Sasaki
Yasuhiro Takahashi
Shoji Sasaki
Yasuhiro Takahashi
Application Number:
JP2006037351A
Publication Date:
August 31, 2011
Filing Date:
February 15, 2006
Export Citation:
Assignee:
Fuji Electric Equipment Control Co., Ltd.
International Classes:
H01H83/02; H01H83/04
Domestic Patent References:
| JP2005158559A | ||||
| JP2002289085A | ||||
| JP2004227898A | ||||
| JP9224328A | ||||
| JP61098339U | ||||
| JP8306297A |
Attorney, Agent or Firm:
Yoichi Matsumoto