LEAKAGE BREAKER - PANASONIC CORP

Title:

LEAKAGE BREAKER

Document Type and Number:

WIPO Patent Application WO/2012/008088

Kind Code:

A1

Abstract:

Disclosed is a leakage breaker comprising: a level discriminator (4) that compares the output levels of a zero-phase current transformer (1) provided in an electrical circuit, with each of a plurality of pre-set reference levels, and outputs a plurality of pulses that indicate the time that the plurality of reference levels were exceeded; a continuous time count unit (6) that counts the time that pulses are continuously output, for each of the plurality of reference levels and based on each of the plurality of pulses output from the level discriminator (4); a circuit break determination unit (7) that outputs a signal to break the electrical circuit in the event that circuit break levels set for each of the plurality of reference levels are maintained and the time obtained by the continuous time count unit exceeds the circuit break level for the corresponding reference level; and a relay coil drive circuit (8) that drives a coil (3a) in a circuit break relay, in response to the output signal from the circuit break determination unit (7).

Inventors:

TAKIGUCHI MASAHIRO
KAWASE TOMOYUKI
AKAI NARUAKI

Application Number:

PCT/JP2011/003252

Publication Date:

January 19, 2012

Filing Date:

June 09, 2011

Export Citation:

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Assignee:

PANASONIC CORP (JP)
TAKIGUCHI MASAHIRO
KAWASE TOMOYUKI
AKAI NARUAKI

International Classes:

H01H83/02

Foreign References:

JPH0393422A	1991-04-18
JP2005183226A	2005-07-07
JP2002008510A	2002-01-11
JPH06245364A	1994-09-02

Other References: