DEVICE FOR MONITORING AN ELECTRICAL CONDUCTOR AND ELECTRICAL INSTALLATON COMPRISING SUCH A DEVICE

• US 20170074917A1
• Filed: 06/27/2016
• Published: 03/16/2017
• Est. Priority Date: 09/10/2015
• Status: Active Grant

• Current Assignee: Schneider Electric Industries SAS (Schneider Electric SE)
• Original Assignee: Schneider Electric Industries SAS (Schneider Electric SE)
• Inventors: CUMUNEL, Pascal, POLLO, Stephane, CAOUS, Philippe
• Granted Patent: US 10,444,271 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01R 15/06 having reactive components, e.g. capacitive transformer
• CPC Class Codes: G01R 15/142 Arrangements for simultaneous measurements of several parameters employing techniques covered by groups G01R15/14 - G01R15/26
• CPC Class Codes: G01R 15/16 using capacitive devices
• CPC Class Codes: G01R 31/58 Testing of lines, cables or conductors testing of electric windings G01R31/72

Abstract

The monitoring device for an electrical line conductor and including a protective housing, an attachment mechanism, an electronic monitoring circuit and a voltage measurement sensor including a measurement electrode. The monitoring device also includes a protection device surrounding the voltage measurement electrode and extending outside the housing to prevent rainwater from completely covering the voltage measurement electrode and/or the housing containing said electrode. The protection device includes an electrical shielding for stabilizing, around the voltage measurement electrode, the electric field variations due to external conditions. The electrical installation includes at least one line conductor and at least one monitoring device communicating with a communication device.

Claims

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,

an electronic monitoring circuit, and

a voltage measurement sensor comprising a measurement electrode connected to said electronic circuit,

wherein a protection device surrounding the voltage measurement electrode and extending outside of the 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.

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 intended to be electrically connected to the line conductor with the attachment mechanism.

4. The monitoring device according to claim 1, wherein the protection device consists of at least one skirt arranged 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.

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

6. 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.

7. 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.

8. 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.

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

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

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

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

12. 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.

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