| 摘要 |
Improvements introduced into the subject of Patent of Invention num. P-9002043/X, for: system for transmitting information on the state of the loads connected to an electricity line. It is of the type which features a central control unit connected to a plurality of sector-control units, each of them linked, via the electricity line 1 for supplying the load 12 to a plurality of load-control units, to which a load 12 is connected; it is for the purpose of allowing connection of the load-control unit at the base of the support and detecting the capacitive currents which flow through the capacitor associated with the lamp 12 when it burns out, to which end it features a first device consisting of a phase comparator 7 which is connected to the pulse-generator circuits 5 and 6, and the latter to a DC isolation circuit 3 and 4 which is connected to the electricity line 1 and to a tap or shunt 2; another purpose consists in detecting the pulse trains generated by the sector-control unit for its interrogation, isolating the load at that instant and thus detecting the correct response, to which end it features a second device consisting of a switching circuit 19 which is connected to a circuit for detecting alternating current higher than a threshold 18. <IMAGE>
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