Patent ID: 6882511
Filing Date: 2005-04-19
Classification: H02H

Abstract:
1. An electronic earth current leakage current device for a low-voltage power line, comprising: a moving contact and a fixed contact which can be mutually coupled/uncoupled; and first sensor means for detecting an earth leakage current and for generating an electric signal which is indicative of the value of said earth leakage current; and first electronic means which are electrically connected to said first sensor means in order to generate an electric tripping signal depending on said electric signal which is indicative of the value of said earth leakage current; and actuation means, operatively connected to said moving contact, in order to perform, in response to command electric signals, the separation of said moving contact from said fixed contact; wherein said first electronic means comprise first circuit means for generating said electric tripping signal after a preset constant minimum time interval, and said first circuit means comprise a first circuit network for generating an electric tripping signal, following the reception in input of an electric signal; and a first circuit block for sending, following the reception of a first and second enable signals in input to said first circuit network, an electric current signal for generating said electric tripping signal after the preset constant minimum time interval.