Device and method for signaling electric fault, unit and switch panel comprising the device
A technology for electrical faults and fault currents, applied in electrical components, measuring electricity, circuit devices, etc., to solve problems such as incompatibility of processing channels
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[0052]An apparatus for signaling an electrical fault according to a preferred embodiment is shown in block diagram at image 3 middle. This device contains a current measuring sensor 10 which measures differential or residual leakage currents. The sensor 10 is generally formed by a transformer in the form of a ring arranged around the conductive wire 2 and a secondary winding 15 in order to provide a signal Id1 representative of the differential current Id to the processing circuit 20 .
[0053] The processing circuit 20 comprises a signal processing module 21 which conditions the secondary current signal Id1 into a signal Id2 which can be processed by an analog or digital circuit. Module 22 may contain nominal or threshold adjustment functions. The processing circuit 20 also includes a global processing circuit 22 for receiving a signal Id2 representative of the differential current and providing a first fault detection signal Fd1 when the measured current exceeds a predete...
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