Title:
漏電遮断器
Document Type and Number:
Japanese Patent JP4931754
Kind Code:
B2
Abstract:
The invention obtains an electric leakage circuit breaker, which can reduce the voltage applied between the contacts of the test switch, and can reduce the insulating intensity requirement between the test coil and the secondary coil of the zero-phase converter. The electric leakage circuit breaker includes a zero-phase converter, inserted in an alternating current circuit; a leakage detection circuit, which produces output when the leakage current flowing through the zero-phase converter exceeds a specified size; a tripping circuit, disconnecting the broken circuit section in the alternating current circuit based on the output of the leakage detection circuit; a rectifier circuit, rectifying the voltage of the alternating current circuit and then supplying to the leakage detection circuit; and a test circuit, for making the analog leakage current flow through a measuring coil coiled on the zero-phase converter, wherein, the test circuit is connected at the outlet side of the rectifier circuit, and is composed of a series connection body connecting a measuring coil, a test switch, a current-limiting resistance and a light insulated unit in series.
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Inventors:
Tatsuyuki Tsukamoto
Shintaro Kamiya
Takeshi Kanayama
Shintaro Kamiya
Takeshi Kanayama
Application Number:
JP2007259885A
Publication Date:
May 16, 2012
Filing Date:
October 03, 2007
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02H3/347; G01R31/02; H01H83/02; H01H83/04; H02H3/05
Domestic Patent References:
| JP2005251410A | ||||
| JP2007149603A | ||||
| JP8019166A | ||||
| JP2002078187A | ||||
| JP2005158559A |
Attorney, Agent or Firm:
Masuo Oiwa
Toshihide Kodama
Takenaka Ikuo
Keigo Murakami
Toshihide Kodama
Takenaka Ikuo
Keigo Murakami