Gas insulated high voltage electrical device equipped with an enhanced particle trap

Patent metadata

Field	Value
Publication number	US-9799472-B1
Application number	US-201715411462-A
Country	US
Kind code	B1
Filing date	Jan 20, 2017
Priority date	Jan 20, 2017
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

A gas insulated high voltage electrical device comprising: at least one conductor for conducting a high voltage current; a longitudinal enclosure for enclosing the at least one conductor, the longitudinal enclosure comprising an interior wall extending along a longitudinal axis; a particle trap formed on the interior wall and extending along the longitudinal axis, the particle trap comprising a part of the interior wall and a longitudinal shielding cover extending along the longitudinal axis to delimit a dielectrically shielding area in the enclosure for trapping particles; the shielding cover being made of an electrically conducting material and comprising at least two electrical connections to the interior wall spaced from each other along the longitudinal axis, the shielding cover comprising a mechanical resonating frequency that makes the shielding cover longitudinally oscillate when the high voltage current passes through the conductor.

First claim

The invention claimed is:

1. A gas insulated high voltage electrical device comprising:
at least one conductor for conducting a high voltage current;
a longitudinal enclosure for enclosing the at least one conductor, the longitudinal enclosure comprising an interior wall extending along a longitudinal axis;
a particle trap formed on the interior wall and extending along the longitudinal axis, the particle trap comprising a part of the interior wall and a longitudinal shielding cover extending along the longitudinal axis to delimit a dielectrically shielding area in the enclosure for trapping particles;
the shielding cover being made of an electrically conducting material and comprising at least two electrical connections to the interior wall spaced from each other along the longitudinal axis, the shielding cover comprising a mechanical resonating frequency that makes the shielding cover longitudinally oscillate when the high voltage current passes through the conductor.

2. The device of claim 1 , wherein the electrically conducting material of the shielding cover is a non-ferromagnetic material.

3. The device of claim 2 , wherein the non-ferromagnetic conducting material of the shielding cover is aluminum.

4. The device of claim 1 , wherein the mechanical resonating frequency is tuned to an operating frequency of the conductor.

5. The device of claim 1 , wherein the shielding cover comprises a plurality of through holes.

6. The device of claim 1 , wherein the two electrical connections are mechanical fixing means made of an electrically conducting material.

7. The device of claim 6 , further comprising at least two elements made of a flexible material and positioned at the mechanical fixing means between the interior wall and the shielding cover.

8. The device of claim 1 , wherein the part of the interior wall belonging to the particle trap has a longitudinal depression extending along the longitudinal axis and the shielding surface spans the depression.

Assignees

• General Electric Technology Gmbh

Inventors

• Hermosillo Victor F
• Rebovich Justin M

Classifications

• H01H33/66261

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

• H01H33/53

  Cases (for switchgear H02B1/26); Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices · CPC title

• H02G5/065 Primary

  Particle traps (gettering in vacuum switches H01H33/6683; in discharge or vacuum tubes H01J7/18, H01J19/70) · CPC title

• H01H33/64

  wherein the break is in gas (vacuum switches H01H33/66) · CPC title

• H01H33/56 Primary

  Gas reservoirs · CPC title