Vacuum load break switch for performing vacuum making/breaking and isolation operation in a single stroke

Patent metadata

Field	Value
Publication number	US-2022013312-A1
Application number	US-202117343931-A
Country	US
Kind code	A1
Filing date	Jun 10, 2021
Priority date	Jul 7, 2020
Publication date	Jan 13, 2022
Grant date	—

Abstract

Embodiment herein provide a vacuum Load break switch comprising a tank (Metallic or non-metallic) ( 1 ), an interruption system ( 2 ) enclosed in the tank ( 1 ), a drive lever ( 3 ) connected to the interruption system ( 2 ), a leak proof system ( 4 ) with multiple O-Rings connected to the interruption system ( 2 ), and a source side connector ( 5 ) and a load side connector ( 6 ) connected to the interruption system ( 2 ). During an open operation, a current inside the vacuum interruption system ( 2 ) is interrupted to move the interruption system ( 2 ) and create an isolation distance. Further, during a close operation, the vacuum interruption system ( 2 ) moves to make the isolation distance zero and then the current flow is started inside vacuum interruption system ( 2 ).

First claim

We claim:

1 . A vacuum Load break switch comprising:
a tank ( 1 ); an interruption system ( 2 ) enclosed in the tank ( 1 ); a drive lever ( 3 ) connected to the interruption system ( 2 ); a leak proof system ( 4 ) with multiple O-Rings connected to the interruption system ( 2 ); and a source side connector ( 5 ) and a load side connector ( 6 ) connected to the interruption system ( 2 ), wherein during an open operation, an electrical current inside the vacuum interruption system ( 2 ) is interrupted and the vacuum interruption system ( 2 ) is moves to create an isolation distance; and wherein during a close operation, the vacuum interruption system ( 2 ) moves back to make the isolation distance zero and the contacts inside the vacuum interruption system ( 2 ) closes to resume the electrical current flow inside vacuum interruption system ( 2 ).

2 . The vacuum Load break switch as claimed in claim 1 , wherein during the open operation both the electrical current inside the vacuum interruption system ( 2 ) is interrupted and the isolation distance is created in a single stroke of operation through an electrical control or by a manual handle of the vacuum Load break switch.

3 . The vacuum Load break switch as claimed in claim 1 , wherein during the close operation both the isolation distance is removed and the electrical current inside the vacuum interruption system ( 2 ) is started in a single stroke of operation through an electrical control or by a manual handle of the vacuum Load break switch.

4 . The vacuum Load break switch as claimed in claim 1 , wherein the current is a load current or a short circuit current.

5 . The vacuum Load break switch as claimed in claim 1 , wherein the interruption system ( 2 ) comprises:
a bush load side ( 7 ); a voltage measurement system ( 8 and 22 ) connected to the bush load side ( 7 ), wherein the voltage measurement system ( 8 and 22 ) measure continuous voltage and send the measured voltage to a processing unit; a shock absorbing medium ( 9 and 23 ) to absorb shocks during the open operation and the close operation of the vacuum interruption system ( 2 ); a movable rod ( 11 ) connected to the open spring ( 10 ), wherein the movable rod ( 12 ) carries the current during the close operation of the interruption system ( 2 ) and allows the vacuum interrupter ( 20 ) to create the isolation distance during the open operation of the interruption system ( 2 ); a bottom fixed cover ( 12 ) to seal vacuum inside the interruption system ( 2 ), wherein the bottom fixed cover ( 12 ) provides seat for the open spring ( 10 ) and controls the gap between the contacts in the vacuum interruption system ( 2 ); bellows ( 13 ) to allow the movable rod ( 12 ) to open at the isolation distance during the open operation of the vacuum interruption system ( 2 ); a drive holder ( 14 ) to transmit controlled linear motion of the drive lever ( 3 ) to the vacuum interruption system ( 2 ) ensuring required contact force by compressing open spring ( 10 ); an insulation cover ( 15 ) to provide an insulation between the source side connector ( 5 ) and the load side connector ( 6 ); a movable contact ( 16 ) to enable making and breaking of the current; a fixed contact ( 17 ) fixed to the moveable contact to receive the current in closed condition; a fixed rod ( 18 ) fixed to the fixed contact ( 17 ) to make or break or carry the current; a top fixed cover ( 19 ); a bush source side ( 21 ); and a vacuum interrupter ( 20 ).

6 . The vacuum Load break switch as claimed in claim 5 , wherein the open spring ( 10 ) outside the vacuum interrupter ( 20 ) does not allow movement the movable contact ( 16 ) until the interruption system ( 2 ) opens completely during the open operation.

7 . The vacuum Load break switch as claimed in claim 5 , wherein the open spring ( 10 ) outside the vacuum interrupter ( 20 ) retain the movable contact ( 16 ) in open condition inside the vacuum interrupter ( 20 ) until the isolation distance become zero during the close operation, wherein the open spring ( 10 ) provides required contact pressure on the contacts of the vacuum interrupter ( 20 ) in closed condition.

8 . The vacuum Load break switch as claimed in claim 5 , wherein the shock absorbing medium ( 9 and 23 ) is achieved using elastic material comprising elastomers or spring system or oil damping system.

9 . The vacuum Load break switch as claimed in claim 5 , wherein the bottom fixed cover ( 12 ) keeps the vacuum interrupter ( 20 ) in a sealed condition to retain the vacuum inside the vacuum interrupter ( 20 ), and wherein the bottom fixed cover ( 12 ) helps to provide the seat for the open spring ( 10 ) and controls the stroke/contact gap of the vacuum interrupter ( 20 ).

10 . The vacuum Load break switch as claimed in claim 1 , wherein the isolation distance is made visible by providing a viewing window on the tank ( 1 ).

Assignees

• Schneider Electric Ind Sas

Inventors

• Deshmukh Abhijit
• Raorane Deepak

Classifications

• H01H33/666 Primary

  Operating arrangements · CPC title

• H01H33/668

  Means for obtaining or monitoring the vacuum · CPC title

• H01H33/664

  Contacts; Arc-extinguishing means, e.g. arcing rings · CPC title

• H01H33/127 Primary

  movable with a sectionalising contact arm and operated by such movement · CPC title

• H01H33/122

  both breaker and sectionaliser being enclosed, e.g. in SF6-filled container · CPC title