Patent ID: 8705214

Claim:
A circuit arrangement, comprising: at least two capacitors; a first voltage; a protective diode; a series resistance; a protective circuit, the protective circuit including a coupling element, the coupling element including a transmit part and a receiver part, wherein the coupling element couples the series resistance to an alarm circuit; and a pre-resistance is connected upstream of the transmit part of the coupling element, wherein the protective circuit in series with the pre-resistance is disposed in parallel with the series resistance, wherein the at least two capacitors are connected in series, across which series connection of the at least two capacitors defines the first voltage, wherein a voltage divider is arranged parallel to the at least two capacitors, which divides the first voltage between the at least two capacitors, wherein a protective diode in series with a series resistance is arranged parallel to each capacitor, wherein during fault-free operation whereby the capacitors are working properly without a short circuit; no voltage is present at the series resistance and a threshold voltage of the protective diode is lower than a permissible voltage of the capacitor arranged parallel to the protective diode and the series resistance, wherein in the event of a fault whereby at least one of the capacitors includes a short circuit; a second voltage present at the series resistance triggers an activation of the alarm circuit.