DISPOSITIVO PER RIVELARE I GUASTI DI UTENTI DI ENERGIA ELETTRICA
To detect the failure of e.g. a lamp (2) supplied from a D.C. source (4) through a switch (3) controlled by a manually-operated member (5), a resistance (1) of much greater value than that of the lamp (2) is connected across the switch (3), and the voltage V1 across the resistance (1) is used for th...
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