发明名称 |
ARC-FAULT AND GROUND FAULT INTERRUPTER USING A SINGLE GROUND FAULT SENSOR AND SINGLE ADC |
摘要 |
<p>Sampling for arc-fault detection, ground-fault detection, and grounded-neutral fault detection uses a single analog-to-digital converter (ADC). The arc-fault and ground-fault sampling occurs at regular sampling periods that are relatively short compared to the time between them, thus allowing grounded-neutral fault sampling to occur before and/or after one of these sampling periods. A predefined event may be used to ensure the grounded-neutral fault sampling occurs immediately before and/or after one of the periodic sampling periods. The predefined event may be the expiration of a timer or the time for a sinusoidal signal in a ground fault sense circuit to make a predefined number of zero-crossings. This avoids interference between the arc-fault sampling, the ground-fault sampling and grounded-neutral fault sampling, allowing a single ADC to perform all samplings concurrently. The timing of the predefined event may be periodically reset to compensate for any changes due to temperature and/or over time.</p> |
申请公布号 |
WO2015038140(A1) |
申请公布日期 |
2015.03.19 |
申请号 |
WO2013US59618 |
申请日期 |
2013.09.13 |
申请人 |
SCHNEIDER ELECTRIC USA, INC. |
发明人 |
DRAMÉ, ISSA VIGNON;GASS, RANDALL JAMES |
分类号 |
G01R31/00 |
主分类号 |
G01R31/00 |
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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