Title:
SWITCH, CONTACT PROTECTION ASSEMBLY AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/174545
Kind Code:
A1
Abstract:
Provided are a switch (200), a contact protection assembly (100) for a switch (200) and a manufacturing method thereof. The contact protection assembly (100) comprises a protection cover assembly (101) rotatably coupled to a moveable blade (201) of the switch (200), the moveable blade (201) being rotatable about a first shaft (203) of the switch (200) to change an engagement status of contact fingers (2011) of the moveable blade (201) with a fixed contact (202); a second shaft (103) arranged at a distance from the first shaft (203); and an actuation rod (102) coupled between the protection cover assembly (101) and the second shaft (103) and configured to be rotatable about the second shaft (103) with a rotation of the moveable blade (201), wherein the second shaft (103) is arranged parallel to the first shaft (203) to enable the actuation rod (102) to push or pull the protection cover assembly (101) to rotate between a covering position and an exposing position, wherein the protection cover assembly (101) covers the contact fingers (2011) at the covering position and exposes the contact fingers (2011) at the exposing position. With the contact protection assembly (100), foreign objects like ice covering the contact fingers (2011) can be easily removed with the rotation of the protection cover assembly (101). This arrangement makes the switch (200) such as an earthing switch meet requirements of relevant standards, which require that the engagement of contact fingers (2011) with the fixed contact (202) cannot be affected in a case where the contact fingers (2011) are covered by a 20mm ice layer. In this way, the stability of the switch (200) is improved.
Inventors:
ZHANG JIAN (CN)
LV ZHANGANG (CN)
ZHANG WEIDONG (CN)
LV ZHANGANG (CN)
ZHANG WEIDONG (CN)
Application Number:
PCT/CN2020/078263
Publication Date:
September 10, 2021
Filing Date:
March 06, 2020
Export Citation:
Assignee:
ABB POWER GRIDS SWITZERLAND AG (CH)
ZHANG JIAN (CN)
LV ZHANGANG (CN)
ZHANG WEIDONG (CN)
ZHANG JIAN (CN)
LV ZHANGANG (CN)
ZHANG WEIDONG (CN)
International Classes:
H01H31/02; H01H1/64; H01H31/28
Foreign References:
| US7223928B2 | 2007-05-29 | |||
| CN202332596U | 2012-07-11 | |||
| CN2881930Y | 2007-03-21 | |||
| CN1838358A | 2006-09-27 | |||
| CN2775820Y | 2006-04-26 | |||
| CN104715958A | 2015-06-17 | |||
| US6563066B1 | 2003-05-13 | |||
| US7211761B2 | 2007-05-01 |
Attorney, Agent or Firm:
NTD PATENT & TRADEMARK AGENCY LTD. (CN)
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