Dielectric shield for a switching device

Patent metadata

Field	Value
Publication number	US-11657987-B2
Application number	US-202117230088-A
Country	US
Kind code	B2
Filing date	Apr 14, 2021
Priority date	Apr 14, 2020
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

A pole assembly of a switching device is provided. The pole assembly includes a first interrupter unit operably connected to a pole plate of the pole assembly via first post insulators. The first interrupter provides a path for current flow through the first interrupter in a closed state and interrupts the current flow in an open state. A second interrupter unit is operably connected to the first interrupter unit and to the pole plate via second post insulators. The second interrupter allows the current flow through the first interrupter unit in an open state and grounds the switching device in a closed state. The pole assembly includes a dielectric shield physically disposable between and operably connected to the first post insulators and the second post insulators for uniformly distributing an electric field generated during operation of the pole assembly.

First claim

The invention claimed is:

1. A pole assembly of a switching device, the pole assembly comprising:
a pole plate;
a first interrupter unit operably connected to the pole plate via a first post insulator and a second post insulator, the first interrupter unit operable to provide a path for current flow through the first interrupter unit in a closed state and interrupting the current flow in an open state; and
a second interrupter unit operably connected to the first interrupter unit, the second interrupter unit operably connected to the pole plate via a third post insulator and a fourth post insulator, wherein the second interrupter unit is operable to allow the current flow through the first interrupter unit in an open state and operable to ground the switching device in a closed state; and
a dielectric shield physically disposable between and operably connected to the third post insulator and the second post insulator, wherein the dielectric shield comprises an electrically conducting material encapsulated within an insulating material.

2. The pole assembly of claim 1 , wherein the first interrupter unit and the second interrupter unit are operably connected via an interlink arrangement, and
wherein the dielectric shield is positioned in proximity of the interlink arrangement.

3. The pole assembly of claim 2 , wherein the dielectric shield is positioned longitudinally parallel to the interlink arrangement.

4. The pole assembly of claim 2 , wherein the dielectric shield is positioned longitudinally parallel to the pole plate and proximal to the first interrupter unit and the second interrupter unit.

5. The pole assembly of claim 2 , wherein at least one physical dimension of the dielectric shield is defined based on one or more physical properties associated with the interlink arrangement, wherein the at least one physical dimension comprises one or more of a length and a width of the dielectric shield, and wherein the one or more physical properties comprise one or more of a length and a width of the interlink arrangement.

6. The pole assembly of claim 1 , wherein the dielectric shield has a generally rounded profile.

Assignees

• Kumar Lokesh
• Rajagopal Ratheesh
• Siemens Ag

Inventors

• Kumar Lokesh
• Rajagopal Ratheesh

Classifications

• H01H33/666

  Operating arrangements · CPC title

• H01H31/003 Primary

  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 title

• H01H33/662

  Housings or protective screens · CPC title

• H01H33/66261

  Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations · CPC title

• H01H9/32 Primary

  Insulating body insertable between contacts · CPC title