Abstract: A device for monitoring partial discharges in an AC electrical network, the monitoring device being mounted in a switching apparatus provided with a vacuum bottle connected to one phase of the AC network. The monitoring device includes a partial discharge detector positioned facing the vacuum bottle and an electronic processing unit receiving a first signal representative of the partial discharges detected by the capacitive sensor and receiving a second signal representative of the voltage of the electrical network. The processing unit includes discriminating means which are capable, according to the first signal and the second signal, of determining whether the partial discharges originate from a loss of vacuum in the vacuum bottle or originate from another cause external to the vacuum bottle.

Abstract: A device for monitoring partial discharges in an AC electrical network, the monitoring device being mounted in a switching apparatus provided with a vacuum bottle connected to one phase of the AC network. The monitoring device includes a partial discharge detector positioned facing the vacuum bottle and an electronic processing unit receiving a first signal representative of the partial discharges detected by the capacitive sensor and receiving a second signal representative of the voltage of the electrical network. The processing unit includes discriminating means which are capable, according to the first signal and the second signal, of determining whether the partial discharges originate from a loss of vacuum in the vacuum bottle or originate from another cause external to the vacuum bottle.