Title:
漏電検出機能付配線器具
Document Type and Number:
Japanese Patent JP5119063
Kind Code:
B2
Abstract:
In a wiring device which detects a leakage current in an electrical path connecting a commercial power supply and a load to interrupt the electrical path, the electrical leakage can reliably be interrupted even when the leakage current has a distorted waveform. A wiring device (1) includes a leakage control unit (4) for detecting a leakage current flowing through an electrical path connecting a commercial power supply and a load (30) to perform a leakage determination and a switching unit (2) for interrupting the electrical path in accordance with the leakage determination of the leakage control unit (4). The leakage control unit (4) has a filter (42) for filtering the detected leakage current and having a frequency characteristic which the human body has with respect to an electrical shock, a square operation unit (43) for calculating the square operation value of a signal which relates to the leakage current passing through the filter (42), and a threshold determination unit (46) for performing the leakage determination in accordance with the square operation value obtained by the square operation unit (43). Consequently, the leakage determination is performed in accordance with the square operation value, so that the leakage can be detected with high accuracy even when the leakage current has a distorted waveform, and the electrical leakage can be reliably interrupted.
Inventors:
Kiyoshi Goto
Application Number:
JP2008173082A
Publication Date:
January 16, 2013
Filing Date:
July 02, 2008
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
H01H83/02
Domestic Patent References:
| JP10042457A | ||||
| JP61009120A | ||||
| JP2001268779A | ||||
| JP4271225A | ||||
| JP2005108607A |
Foreign References:
| WO2008069249A1 |
Attorney, Agent or Firm:
Yasuo Itaya
Katsumi Taguchi
Shinichi Mizuta
Katsumi Taguchi
Shinichi Mizuta