Device for monitoring an electrical conductor and electrical installaton comprising such a device

1. A monitoring device intended to be arranged on an electrical line conductor and comprising:

a protective housing;

a mechanism for attaching said housing to the line conductor such that the protective housing is disposed below the line conductor;

an electronic monitoring circuit disposed within the protective housing;

a voltage measurement sensor, disposed within the protective housing, comprising a measurement electrode connected to said electronic monitoring circuit; and

a protection device surrounding the voltage measurement electrode and extending externally to the protective housing to prevent rainwater from completely covering the voltage measurement electrode and/or the housing containing said electrode, said protection device comprising an electrical shielding for stabilizing, around the voltage measurement electrode, the electric field variations due to external conditions,

wherein

the protection device includes at least one skirt arranged externally on the protective housing and having an outer perimeter greater than the perimeter of the housing and a height greater than the height of the voltage measurement electrode,

the protection device fully surrounding the protective housing, and

each of the protective housing, the voltage measurement sensor, the electronic monitoring circuitry, and the protection device being disposed completely below the line conductor.

2. The monitoring device according to claim 1 , wherein the electrical shielding is deposited with a metal-coating of at least a part of the protection device.

3. The monitoring device according to claim 1 , wherein the electrical shielding is configured to be electrically connected to the line conductor with the attachment mechanism.

4. The monitoring device according to claim 1 , wherein the protection device has the form of a substantially circular or frustoconical skirt.

5. The monitoring device according to claim 1 , wherein the protection device comprises at least one shoulder or step for preventing the water from rising up inside said protection device.

6. The monitoring device according to claim 1 , wherein the protection device is formed by at least two parts intended to be assembled around the protective housing.

7. The monitoring device according to claim 1 , wherein the protection device comprises at least two skirts with different shapes arranged at different points on the protective housing.

8. The monitoring device according to claim 7 , wherein the protection device comprises:

a first skirt having a first outer perimeter and a first inner perimeter arranged so that said first inner perimeter is situated above the position of the voltage measurement electrode and the first outer perimeter is situated below the position of said electrode, and

a second skirt arranged below the first skirt and having an outer perimeter smaller than that of the first skirt.

9. The monitoring device according to claim 1 , comprising a current measurement sensor comprising a magnetic circuit and a secondary winding connected to a processing circuit, said magnetic circuit being associated with the mechanism for attaching the housing to the line conductor.

10. The monitoring device according to claim 1 , comprising wireless communication means and/or visual signalling means connected to a processing unit of the electronic monitoring circuit.

11. An electrical installation comprising at least one line conductor and at least one monitoring device arranged on said line conductor,

wherein said monitoring device is a monitoring device according to claim 1 .

12. The electrical installation according to claim 11 , comprising at least one wireless communication device, the said monitoring device being intended to communicate with said communication device.