Invention Grant
US08908339B2 Methods and appratus for ground fault circuit interrupt detection using a single transformer
有权
使用单个变压器进行接地故障电路中断检测的方法和设备
- Patent Title: Methods and appratus for ground fault circuit interrupt detection using a single transformer
- Patent Title (中): 使用单个变压器进行接地故障电路中断检测的方法和设备
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Application No.: US13926162Application Date: 2013-06-25
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Publication No.: US08908339B2Publication Date: 2014-12-09
- Inventor: Hugh T. Kinsel
- Applicant: Hugh T. Kinsel
- Applicant Address: US GA Alpharetta
- Assignee: Siemens Industry, Inc.
- Current Assignee: Siemens Industry, Inc.
- Current Assignee Address: US GA Alpharetta
- Main IPC: H02H3/16
- IPC: H02H3/16 ; H02H3/33
Abstract:
A device is provided for use with an AC power system having a line conductor, a neutral conductor and a transformer, the line conductor and the neutral conductor are coupled between a source and a load, and the transformer includes a first primary winding coupled in series with the line conductor, a second primary winding coupled in series with the neutral conductor, and a secondary winding. The device includes a first circuit coupled to the secondary winding, providing a first detection signal if a current from the line conductor to ground exceeds a first predetermined threshold, and a second circuit coupled to the secondary winding, having a source that provides an AC signal at a specified amplitude and a specified frequency to the secondary winding. The second circuit provides a second detection signal if an impedance between the neutral conductor and ground is less than a second predetermined threshold.
Public/Granted literature
- US20130279050A1 METHODS AND APPRATUS FOR GROUND FAULT CIRCUIT INTERRUPT DETECTION USING A SINGLE TRANSFORMER Public/Granted day:2013-10-24
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