Switching gas cooling and particle trapping system

Patent metadata

Field	Value
Publication number	US-10079121-B2
Application number	US-201515523694-A
Country	US
Kind code	B2
Filing date	Oct 26, 2015
Priority date	Nov 6, 2014
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

A system for switching gases appearing after a short-circuit switching procedure in electrical service devices, particularly in low-voltage power switches, includes a switching gas cooling assembly and particle capture arrangement. Downstream of the flow path of switching gases issuing from at least one switching chamber outlet window, the switching gas cooling assembly is arranged in a blow-out chamber. In the space behind the at least one switching chamber outlet window and prior to entry of the switching gases into the switching gas cooling assembly, there is arranged a flow element around which the switching gases can flow and which has a cross section which corresponds to or is greater than the cross section of the switching chamber outlet window. The flow elements act as the particle capture arrangement and thus as a protection device for the switching gas cooling arrangement.

First claim

The invention claimed is:

1. A system, comprising:
a planar flow element;
a switching gas cooling assembly; and
a particle trapping assembly for one or more switching gases produced after a short-circuit switching operation in electrical installation equipment,
wherein the switching gas cooling assembly is arranged in an exhaust chamber, downstream of a flow path of the switching gases leaving at least one switching chamber outlet opening,
wherein the planar flow element, configured as the particle trapping assembly, is arranged in a space behind the at least one switching chamber outlet opening and in front of where the switching gases enter the switching gas cooling assembly,
wherein the switching gases can flow around the planar flow element,
wherein the planar flow element has a cross section that is equal to or larger than a cross section of the switching chamber outlet opening,
wherein the switching gas cooling assembly is formed of parallel cooling plates,
wherein the planar flow element is arranged such that a front edge of the planar flow element, facing the switching chamber outlet opening, is at a spacing from the switching gas cooling assembly that is greater than the cross section of the planar flow element, and
wherein the planar flow element has a concave shape and is fastened in the exhaust chamber in a form of a cavity that is open in a direction opposite to a switching gas flow direction.

2. The system of claim 1 , wherein the planar flow element includes a fastener configured to fasten in the exhaust chamber.

3. The system of claim 1 , wherein the planar flow element includes a metal.

4. The system of claim 1 , wherein the planar flow element is arranged downstream of a switching gas flow direction, behind each switching chamber outlet opening.

5. The system of claim 1 , wherein the parallel cooling plates include a material having high thermal conductivity and high thermal capacity,
wherein one or more through-openings between the cooling plates are planar and parallel to a switching gas flow direction.

6. The system of claim 5 , wherein the material and dimensions of the switching gas cooling assembly are configured for short-circuit switching of the electrical installation equipment.

7. The system of claim 1 , wherein the parallel cooling plates are arranged in parallel with a position of the planar flow elements.

8. A low-voltage circuit breaker, comprising the system of claim 1 .

9. A system, comprising:
a planar flow element;
a switching gas cooling assembly; and
a particle trapping assembly for one or more switching gases produced after a short-circuit switching operation in electrical installation equipment,
wherein the switching gas cooling assembly is arranged in an exhaust chamber, downstream of a flow path of the switching gases leaving at least one switching chamber outlet opening,
wherein the planar flow element, configured as the particle trapping assembly, is arranged in a space behind the at least one switching chamber outlet opening and in front of where the switching gases enter the switching gas cooling assembly,
wherein the switching gases can flow around the planar flow element,
wherein the planar flow element has a cross section that is equal to or larger than a cross section of the switching chamber outlet opening,
wherein the switching gas cooling assembly is formed of parallel cooling plates,
wherein the planar flow element is arranged such that a front edge of the planar flow element, facing the switching chamber outlet opening, is at a spacing from the switching gas cooling assembly that is greater than the cross section of the planar flow element, and
wherein the planar flow element includes a ceramic.

10. The system of claim 9 , wherein the planar flow element has a concave shape and is fastened in the exhaust chamber in a form of a cavity that is open in a direction opposite to a switching gas flow direction.

11. The system of claim 9 , wherein the planar flow element includes a fastener configured to fasten in the exhaust chamber.

12. The system of claim 9 , wherein the planar flow element is arranged downstream of a switching gas flow direction, behind each switching chamber outlet opening.

13. The system of claim 9 , wherein the parallel cooling plates include a material having high thermal conductivity and high thermal capacity,
wherein one or more through-openings between the cooling plates are planar and parallel to a switching gas flow direction.

14. The system of claim 13 , wherein the material and dimensions of the switching gas cooling assembly are configured for short-circuit switching of the electrical installation equipment.

15. The system of claim 9 , wherein the parallel cooling plates are arranged in parallel with a position of the planar flow elements.

16. A low-voltage circuit breaker, comprising the system of claim 9 .

Assignees

• Eaton Electrical Ip Gmbh & Co
• Eaton Intelligent Power Ltd

Inventors

• Zacharias Albert
• Ruempler Christian

Classifications

• H01H9/52 Primary

  Cooling of switch parts (cooling of contacts H01H1/62) · CPC title

• H01H33/56

  Gas reservoirs · CPC title

• H01H9/342 Primary

  Venting arrangements for arc chutes · CPC title