Device for measuring at least one electric quantity of a current intended to circulate in an electric apparatus, and assembly comprising such a device

Patent metadata

Field	Value
Publication number	US-9810717-B2
Application number	US-201514644736-A
Country	US
Kind code	B2
Filing date	Mar 11, 2015
Priority date	Apr 24, 2014
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

Device for measuring at least one electrical variable of a current intended to flow in an electric apparatus, the electric apparatus comprising at least one connection terminal, each connection terminal being designed to be electrically connected to the end of a corresponding electric conductor, the device comprising at least one current sensor, each current sensor being configured for measuring the current flowing in a corresponding electric conductor. The device further comprises at least one electrically conductive spacer, each spacer being configured for being interposed between a respective connection terminal and the end of a corresponding electric conductor, and wherein each current sensor is further positioned around a respective spacer, to measure the current flowing through said spacer, between the electric conductor and the corresponding connection terminal.

First claim

The invention claimed is:

1. A device for measuring at least one electrical variable of a current intended to flow in an electric apparatus, the electric apparatus comprising at least one connection terminal, each connection terminal being designed to be electrically connected to the end of a corresponding electric conductor, the device comprising at least one current sensor, each current sensor being configured for measuring the current flowing in a corresponding electric conductor,
wherein the device further comprises at least one electrically conductive spacer, each spacer being configured for being interposed between a respective connection terminal and the end of a corresponding electric conductor, and
wherein each current sensor is further positioned around a respective spacer, to measure the current flowing through said spacer, between the electric conductor and the corresponding connection terminal.

2. The device according to claim 1 , wherein the electric apparatus comprises N connection terminals, N being an integer greater than or equal to 2, and wherein the measuring device comprises N current sensors and N spacers.

3. The device according to claim 1 , wherein at least one current sensor comprises a magnetic circuit and a coil, the coil being positioned between two ends of the magnetic circuit.

4. The device according to claim 3 , wherein the electric apparatus comprises N connection terminals, N being an integer greater than or equal to 2, and wherein the measuring device comprises N current sensors and N spacers,
wherein the magnetic circuits are formed by a single piece in the form of a boustrophedon.

5. The device according to claim 1 , wherein at least one current sensor comprises a winding coiled in the shape of a toroid.

6. The device according to claim 1 , wherein the device comprises at least one voltage sensor configured for measuring the voltage of a corresponding connection terminal.

7. The device according to claim 6 , wherein each voltage sensor is in the form of a tongue positioned against a respective spacer.

8. The device according to claim 1 , wherein each spacer comprises a passage orifice for a connection member connecting the end of the conductor to the corresponding connection terminal.

9. The device according to claim 1 , wherein the device comprises radio means for sending the measured electrical variable(s) to an electronic equipment that is remote from said device.

10. The device according to claim 1 , wherein the device comprises elastic fitting means for fitting with complementary means of the electric apparatus, to fasten the device to the electric apparatus.

11. An assembly comprising an electric apparatus, and a device for measuring at least one electric variable of a current intended to flow in the electric apparatus,
wherein the measuring device is according to claim 1 .

12. The assembly according to claim 11 , wherein the electric apparatus is an electric cutoff apparatus.

13. The assembly according to claim 11 , wherein the electric apparatus is an electric protection apparatus.

14. The assembly according to claim 11 , wherein the electric apparatus is an electric circuit breaker.

Assignees

• Schneider Electric Ind Sas

Inventors

• Tian Simon
• Vigouroux Didier
• Neyret Yannick

Classifications

• G01R15/181

  using coils without a magnetic core, e.g. Rogowski coils · CPC title

• G01R15/18 Primary

  using inductive devices, e.g. transformers · CPC title

• G01R19/00

  Arrangements for measuring currents or voltages or for indicating presence or sign thereof (G01R5/00 takes precedence; for measuring bioelectric currents or voltages A61B5/24) · CPC title

• G01R15/00

  Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00 · CPC title