MEDIUM-VOLTAGE ELECTRIC DISTRIBUTION CUBICLE

• US 20110232959A1
• Filed: 11/30/2009
• Published: 09/29/2011
• Est. Priority Date: 12/18/2008
• Status: Active Grant

• Current Assignee: Schneider Electric Industries SAS (Schneider Electric SE)
• Original Assignee: Schneider Electric Industries SAS (Schneider Electric SE)
• Inventors: Nereau, Jean-Pierre, Henon, Albin, Cabaret, Bertrand, Romanet-Perroux, Philippe
• Granted Patent: US 10,643,809 B2
• Time in Patent Office: Days
• US Class Current: 174/520
• CPC Class Codes: H01H 3/3047 adapted for operation of a three-position switch, e.g. on-off-earth
• CPC Class Codes: H01H 31/003 Earthing switches H01H31/02 - H01H31/26 take precedence; contact made by liquid jet H01H29/32; for substations H02B1/16, H02B5/01; for withdrawable switchgear H02B11/28; for gas-insulated switchgear H02B13/075
• CPC Class Codes: H01H 31/10 for interlocking two or more switches
• CPC Class Codes: H01H 33/6661 Combination with other type of switch, e.g. for load break switches H01H33/143, H01H33/6662 take precedence
• CPC Class Codes: H02B 1/24 Circuit arrangements for boards or switchyards
• CPC Class Codes: H02B 13/00 Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle switchgear having carriage withdrawable for isolation H02B11/00

Abstract

The present invention relates to a medium-voltage electric distribution cubicle designed to be fitted between two parts of an electric circuit so as to perform at least the functions respectively of current flow between the parts, of current interruption between the parts, of circuit disconnection, and of earthing. This cubicle is characterized in that it comprises a switch (or circuit breaker) with vacuum break technology also performing the disconnecting switch function and, in series with said switch (circuit breaker), a selector with at least two positions, respectively a current flow position and an earthing position of one of the parts of the circuit.

Claims

1. A medium-voltage electric distribution cubicle designed to be fitted between two parts of an electric circuit so as to perform at least the functions respectively of current flow between the parts, of current interruption between the parts, of circuit disconnection, and of earthing of one of the above-mentioned parts,

comprising a switch (or circuit breaker) with vacuum break technology also performing the disconnecting switch function and, in series with said switch (circuit breaker), a selector with at least two positions, respectively a current flow position and an earthing position of the parts of the circuit, said switch (circuit breaker) being electrically connected line-side to a busbar and load-side to the above-mentioned selector, which is electrically connected load-side to at least one cable or a busbar, said cubicle being able to take three positions, respectively a closed position, a disconnected position and an earthed position.

2. The electric distribution cubicle according to claim 1 comprising means for preventing the selector from leaving the closed position if the switch (circuit breaker) is in the closed position.

3. The electric distribution cubicle according to claim 1 comprising means for preventing closing of the switch (circuit breaker) if the selector is earthed.

4. The electric distribution cubicle according to claim 1 wherein the above-mentioned selector is a three-position selector, respectively a current flow position, an open position, and an earthed position of one of the parts of the circuit.

5. The electric distribution cubicle according to claim 1 wherein the above-mentioned selector is a selector using gas-break technology.

6. The electric distribution cubicle according to claim 1 wherein the above-mentioned switch (circuit breaker), and/or the above-mentioned selector, is achieved by means of a vacuum cartridge.

7. The electric distribution cubicle according to claim 1 wherein the above-mentioned selector comprises a position, called cable test position, enabling the cables to be tested.

8. The electric distribution cubicle according to claim 4 wherein the cable test position corresponds to the above-mentioned open position of the selector.

9. The electric distribution cubicle according to claim 7 wherein, for performing cable testing, the above-mentioned selector comprises a bushing or fixed part of the test connector connected on the cable side, or a bushing or fixed part of the test connector connected on the same side as a stationary contact of the selector situated on the busbar side.