| 摘要 |
The present invention refers to a device for detecting and signalling mal functions in use of electrical appliances comprising a cyclical or continuou s central measuring and processing unit (15) connected to two input/output p orts (19, 19') for connecting between a source of electrical power (20, 20') and an electrical appliance (30, 30') respectively, the central unit (15) b eing connected to at least one signalling means (11, 12, 12', 13) controlled by a malfunction occurrence signal processed by the central unit (15).
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