LEAKAGE CURRENT SENSING CIRCUIT, EARTH LEAKAGE BREAKER, AND DISTRIBUTION BOARD

WIPO Patent Application WO/2022/264544

A1

The present invention addresses the problem of protecting, from a surge current, a third contact (S3) for cutting off a power supply line to a leakage current sensing unit (5). A leakage current sensing circuit (1) is provided with a first contact (S1) and second contact (S2), the leakage current sensing unit (5), the third contact (S3), and a surge absorber (61). The leakage current sensing unit (5) switches the first contact (S1) and the second contact (S2) each from on to off when occurrence of a leakage current is sensed. The third contact (S3) comprises a first end (P1), and a second end (P2) that is another end of the first end (P1). The first end (P1) is connected to a first input unit (71) or a second input unit (72), and the second end (P2) is connected to the leakage current sensing unit (5). The third contact (S3) switches on/off in conjunction with the switching on/off of the first contact (S1) and the second contact (S2). The surge absorber (61) is connected between a first electrical circuit (C1) and a second electrical circuit (C2) without passing the third contact (S3).

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MAO XIANG
MIYAGAWA KOHEI
NAKAMICHI YOSHIYA

PCT/JP2022/009772

December 22, 2022

March 07, 2022

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PANASONIC HOLDINGS CORP (JP)

H01H83/02; H02B1/40; H02H3/16

WO2002017458A1	2002-02-28
WO2020202794A1	2020-10-08
WO2018173066A1	2018-09-27

JPH11299082A	1999-10-29
JP2014068509A	2014-04-17
JP2018133254A	2018-08-23

HOKUTO PATENT ATTORNEYS OFFICE (JP)

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