Electrical monitoring device and method for safeguarding the protective function of a type A residual current device (RCD)
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United States of America Patent
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Jul 19, 2016
Grant Date -
Mar 21, 2013
app pub date -
May 2, 2012
filing date -
Sep 19, 2011
priority date (Note) -
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Abstract
A monitoring device and a method safeguards the function of a type A residual current device (RCD) in a power supply system. The monitoring device includes a measuring current transformer circuit for detecting a DC fault current (IF), an evaluation unit for processing the current detected by the measuring current transformer circuit, and a communication interface connected to the output of evaluation unit. In one embodiment, the monitoring device forms part of an electrical protection device with a type A residual current device (RCD) for ensuring the function of the type A residual current device (RCD).
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