| 摘要 |
<p>The present invention relates to a system for measuring a load current and for diagnosing an absence of load or an overload, comprising an intelligent power switch (1) able to deliver a measurement (Is) of the load current on a current output, means for converting the measured load current into a voltage value (Vs) and a microcontroller (2) able to deliver orders to said intelligent power switch which are dependent on said voltage value (Vs). In accordance with the invention, the means for conversion comprise a first resistor (3) and a second resistor (4) which are connected in series between said current output and a reference potential, and the system furthermore comprises a control circuit (5, 6) able to compare the voltage tapped off across the terminals of said first resistor (3) and second resistor (4) connected in series with a predetermined threshold value (Vt) and to automatically short-circuit the first (3) or the second (4) resistor when the voltage tapped off is greater than said threshold value (Vt).</p> |
