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US 6,307,725 B1Granted
Fault-current protective switchgear
AssigneeSiemens Aktiengesellschaft
InventorsReinhard Solleder, Reinhard Schmid, Manfred Kleemeier, Fritz Pohl
Life of this patent
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Abstract
A residual current device includes a residual current tripping circuit for actuating a release, and an additional monitoring device for checking the release, in which case a device is provided for electrically decoupling the residual current tripping circuit from the monitoring device.
Claims2
A residual current device comprising:
- a control wire;
- a release;
- a residual-current detection circuit actuating the release via the control wire;
- and
- a decoupling device electrically decoupling the residual current detection circuit from the control line so that the residual current detection circuit does not emit any electrical control signals to the control line leading to the release until a predefined tripping criteria is satisfied.
2 more elements
Dependencies are inferred from the claim text.