Cooling arrangement

Patent metadata

Field	Value
Publication number	US-10643777-B2
Application number	US-201715617916-A
Country	US
Kind code	B2
Filing date	Jun 8, 2017
Priority date	Jun 10, 2016
Publication date	May 5, 2020
Grant date	May 5, 2020

Abstract

A cooling arrangement for a dry-type transformer. The arrangement includes blowing equipment configured to blow a gas flow, and an opening positionable in a clamping structure of the transformer. The opening is configured to allow the gas flow to pass from the blowing equipment towards a winding of the transformer, so that the winding is properly cooled. The opening comprises an electric protecting means for dielectric protection of the clamping structure. A transformer including such cooling arrangement is also disclosed.

First claim

The invention claimed is:

1. A cooling arrangement for a dry-type transformer, the arrangement comprising:
blowing equipment configured to blow at least one gas flow;
at least one opening positioned at least partially in a clamping structure of the transformer;
the opening being configured to allow the gas flow to pass from the blowing equipment towards at least one winding of the transformer;
the clamping structure comprises a clamp and an electric shielding device positioned between the clamp and the winding;
the opening comprising an electric protector.

2. The cooling arrangement according to claim 1 , wherein the clamping structure comprises at least one clamp and the opening is positioned at least partially in the clamp.

3. The cooling arrangement according to claim 2 , wherein the clamping structure further comprises at least one electric shielding device positioned between the clamp and the winding, and the opening is positioned at least partially in the electric shielding device and the clamp.

4. The cooling arrangement according to claim 1 , wherein the electric protector comprises a grid that defines a plurality of holes.

5. The cooling arrangement according to claim 1 , wherein the electric protector comprises a slotted portion that defines a plurality of holes.

6. The cooling arrangement according to claim 1 , wherein the electric protector is integrally formed with the clamping structure.

7. The cooling arrangement according to claim 1 , wherein the blowing equipment has a flow rate of at least 250 m 3 /h.

8. The cooling arrangement according to claim 1 , wherein the transformer comprises an inner winding surrounding at least partially a core and an outer winding surrounding at least partially the core, the inner winding being placed at least partially between the core and the outer winding, wherein the one opening is configured to allow the gas flow to pass from the blowing equipment towards the inner winding.

9. The cooling arrangement according to claim 1 , wherein the blowing equipment comprises at least one fan.

10. The cooling arrangement according to claim 8 , wherein the blowing equipment comprises at least one fan adapted to direct the gas flow to the inner winding and at least one fan adapted to direct the gas flow to the outer winding.

11. The cooling arrangement according to claim 3 , wherein the electric shielding device comprises a protective sheet.

12. The cooling arrangement according to claim 1 , wherein the gas is air.

13. A transformer comprising a cooling arrangement according to claim 1 .

14. A cooling arrangement for a dry-type transformer, the arrangement comprising:
blowing equipment to blow at least one gas flow;
an opening to allow the gas flow to pass from the blowing equipment towards at least one winding of the transformer,
wherein the opening is positionable in an electric shielding device provided between at least one clamp of the transformer and the winding, and
wherein the opening comprises an electric protector.

Assignees

• Abb Schweiz Ag

Inventors

• Nogués Barrieras Antonio
• Roy Martín Carlos
• Sánchez Luis
• Murillo Rafael
• Cebrián Lles Lorena
• Mainar Joven Carlos

Classifications

• H01F27/20 Primary

  Cooling by special gases or non-ambient air · CPC title

• H01F27/2885

  with shields or electrodes (shields or electrodes for pancake coils H01F27/2871; construction of electric or magnetic shields or screens H01F27/36) · CPC title

• H01F27/08 Primary

  Cooling (heat-transfer elements F28F); Ventilating (structural details of casings H01F27/02) · CPC title

• H01F27/085 Primary

  Cooling by ambient air · CPC title

• H01F27/36

  Electric or magnetic shields or screens (movable for varying inductance H01F21/10) · CPC title