2017
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Invention
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Residual current devices. A residual current device (RCD) comprises test circuitry which issues i... |
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G/S
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Electrical safety and protection products; residual current devices; residual current monitors; r... |
2016
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Invention
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Arc fault current detector. An arc fault current detector for an electricity supply having at lea... |
|
G/S
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Electric and electronic apparatus and instruments and parts
and fittings thereof; electrical saf... |
|
G/S
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Electric and electronic apparatus and instruments and parts and fittings thereof, namely, electri... |
2015
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Invention
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Device for detecting a fault in an ac supply. A device for detecting a fault in an AC supply comp... |
2013
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Invention
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Fault detecting device for an electricity supply. A fault detecting device having a plurality of ... |
2011
|
Invention
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Dc and ac current detection circuit. A circuit for detecting a DC current in a conductor (L1) inc... |
|
Invention
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Arc fault detector for ac or dc installations. An arc fault detector comprises a current transfor... |