发明名称 |
Earth leakage detection circuit |
摘要 |
A zero-phase current is outputted by detecting a ground-fault current with a zero-phase-sequence current transformer. A circuit having an open collector output operates when the voltage of the zero-phase current exceeds a positive side threshold value or it falls below a negative side threshold value to discharge a capacitor. When the inter-plate voltage of the capacitor falls below a threshold value voltage, a controlling means detects electric leakage to transmit that to a control unit of an air conditioner. |
申请公布号 |
US8310210(B2) |
申请公布日期 |
2012.11.13 |
申请号 |
US20080738813 |
申请日期 |
2008.09.01 |
申请人 |
DOUMAE HIROSHI;KAGIMURA SUMIO;MASUDA TOORU;DAIKIN INDUSTRIES, LTD. |
发明人 |
DOUMAE HIROSHI;KAGIMURA SUMIO;MASUDA TOORU |
分类号 |
H02J7/00;G01R15/18 |
主分类号 |
H02J7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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