INSULATION ASSEMBLY, TRANSFORMER ASSEMBLY, AND DRY TYPE TRANSFORMER

Title:

INSULATION ASSEMBLY, TRANSFORMER ASSEMBLY, AND DRY TYPE TRANSFORMER

Document Type and Number:

WIPO Patent Application WO/2021/081977

Kind Code:

A1

Abstract:

An insulation assembly for use in a transformer, a transformer assembly for use in a transformer, and a dry type transformer are provided. The insulation assembly (3) comprises a plurality of tubular insulation barriers (31) adapted to be arranged around an inner coil (11) of the transformer (1) to electrically isolate the inner coil (11) from an outer coil (12) of the transformer (1), each pair of adjacent tubular insulation barriers (31) being separated by a gap (32); and an air blocking element (33) arranged in at least one gap (32) between the plurality of tubular insulation barriers (31) to at least partially block an air flow from passing through the at least one gap (32). The air blocking element (33) is provided in at least one gap (32) between the tubular insulation barriers (31) so as to block the cool air from passing through the at least one gap (32). In this way, more cool air may pass through gas channels (14, 15) near to the inner and outer coils (11, 12) and take way more heat generated by the transformer (1), improving the cooling efficiency of the transformer (1).

Inventors:

SUN QINGJUN (CN)
LU QIONGFANG (CN)
XU YE (CN)
YANG YUSONG (CN)

Application Number:

PCT/CN2019/114983

Publication Date:

May 06, 2021

Filing Date:

November 01, 2019

Export Citation:

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Assignee:

ABB POWER GRIDS SWITZERLAND AG (CH)
SUN QINGJUN (CN)
LU QIONGFANG (CN)
XU YE (CN)
YANG YUSONG (CN)

International Classes:

H01F27/08

Domestic Patent References:

WO2019181152A1

2019-09-26

Foreign References:

CN1328330A	2001-12-26
CN204834307U	2015-12-02
CN103999173A	2014-08-20
CN104795212A	2015-07-22
CN1758387A	2006-04-12
JPH11154613A	1999-06-08
EP2793244A1	2014-10-22
EP2827346A1	2015-01-21

Other References: