Disconnecting switch having anti-icing device

Patent metadata

Field	Value
Publication number	US-10622166-B2
Application number	US-201815998469-A
Country	US
Kind code	B2
Filing date	Aug 15, 2018
Priority date	Feb 26, 2016
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

A disconnector with an anti-icing arrangement includes a main blade moving contact, a main blade arm, a main blade static contact, a main blade transmission arrangement and a main blade anti-icing arrangement. The main blade transmission arrangement is adapted for driving the main blade arm to move. The main blade anti-icing arrangement includes a main blade anti-icing shield and a main blade anti-icing shield transmission arrangement. The main blade anti-icing shield transmission arrangement is adapted for drive the main blade anti-icing shield such that the main blade anti-icing shield shields the main blade moving contact in an opened position to keep ice and snow and rainwater from covering a surface of the main blade moving contact, and moves away from the main blade moving contact in a closed position, to enable the main blade moving contact to be contacted with the main blade static contact.

First claim

We claim:

1. A disconnector with an anti-icing arrangement, comprising:
a main blade moving contact, a main blade arm, a main blade static contact and a main blade transmission arrangement that drives the main blade arm to move,
a main blade anti-icing arrangement that includes a main blade anti-icing shield and a main blade anti-icing shield transmission arrangement, wherein the main blade anti-icing shield transmission arrangement is adapted for driving the main blade anti-icing shield, such that the main blade anti-icing shield shields the main blade moving contact in an opening operation to keep ice and snow and rainwater from covering a surface of the main blade moving contact, and moves away from the main blade moving contact in a closing operation to enable the main blade moving contact to be contacted with the main blade static contact;
wherein the main blade anti-icing shield transmission arrangement comprises a main blade slide rail secured on the main blade moving contact for enabling the main blade anti-icing shield to move along the main blade slide rail.

2. The disconnector of claim 1 , wherein the main blade anti-icing transmission arrangement comprises a joint and a transmission shaft, one end of the transmission shaft being connected via the joint to the main blade arm for moving along with the main blade arm, and another end of the transmission shaft being connected to the main blade anti-icing shield.

3. The disconnector of claim 2 , wherein the disconnector further comprises an additionally mounted earthing switch including an earthing blade static contact, an insulator, an earthing blade, an earthing blade moving contact and a base, and the earthing switch further comprises an earthing blade anti-icing arrangement comprises an earthing blade anti-icing shield and an earthing blade anti-icing shield transmission arrangement, wherein
the earthing blade anti-icing shield transmission arrangement is adapted for driving the earthing blade anti-icing shield such that the earthing blade anti-icing shield shields the earthing blade moving contact in the opened position to keep ice and snow and rainwater from covering a surface of the earthing blade moving contact, and moves away from the earthing moving contact in the closed position to enable the earthing blade moving contact to be contacted with the earthing blade static contact.

4. The disconnector of claim 1 , wherein the main blade anti-icing shield comprises a first part and a second part and the first part has an opening greater than that of the second part to prevent movement of the main blade anti-icing shield from being blocked by an ice layer covering the main blade moving contact or the main blade arm during transition from the opened position to the closed position.

5. The disconnector of claim 4 , wherein the disconnector further comprises an additionally mounted earthing switch including an earthing blade static contact, an insulator, an earthing blade, an earthing blade moving contact and a base, and the earthing switch further comprises an earthing blade anti-icing arrangement comprises an earthing blade anti-icing shield and an earthing blade anti-icing shield transmission arrangement, wherein
the earthing blade anti-icing shield transmission arrangement is adapted for driving the earthing blade anti-icing shield such that the earthing blade anti-icing shield shields the earthing blade moving contact in the opened position to keep ice and snow and rainwater from covering a surface of the earthing blade moving contact, and moves away from the earthing moving contact in the closed position to enable the earthing blade moving contact to be contacted with the earthing blade static contact.

6. The disconnector of claim 1 , wherein the main blade anti-icing shield has a cross section of arc, inverted U-shape, inverted V-shape, an upper half of a trapezoid or any combination thereof, for reliably shielding the main blade moving contact and facilitating fall of ice and snow and rainwater therefrom.

7. The disconnector of claim 6 , wherein the disconnector further comprises an additionally mounted earthing switch including an earthing blade static contact, an insulator, an earthing blade, an earthing blade moving contact and a base, and the earthing switch further comprises an earthing blade anti-icing arrangement comprises an earthing blade anti-icing shield and an earthing blade anti-icing shield transmission arrangement, wherein
the earthing blade anti-icing shield transmission arrangement is adapted for driving the earthing blade anti-icing shield such that the earthing blade anti-icing shield shields the earthing blade moving contact in the opened position to keep ice and snow and rainwater from covering a surface of the earthing blade moving contact, and moves away from the earthing moving contact in the closed position to enable the earthing blade moving contact to be contacted with the earthing blade static contact.

8. The disconnector of claim 1 , wherein the main blade anti-icing arrangement further comprises a static contact anti-icing shield for shielding the main blade static contact and keeping ice and snow and rainwater from covering a surface of the main blade static contact.

9. The disconnector of claim 8 , wherein the main blade static contact comprises a fitting, an aluminum stranded wire, a clamp fitting and a static contact copper bar, the static contact anti-icing shield adapted for shielding the static contact copper bar.

10. The disconnector of claim 9 , wherein the disconnector further comprises an additionally mounted earthing switch including an earthing blade static contact, an insulator, an earthing blade, an earthing blade moving contact and a base, and the earthing switch further comprises an earthing blade anti-icing arrangement comprises an earthing blade anti-icing shield and an earthing blade anti-icing shield transmission arrangement, wherein
the earthing blade anti-icing shield transmission arrangement is adapted for driving the earthing blade anti-icing shield such that the earthing blade anti-icing shield shields the earthing blade moving contact in the opened position to keep ice and snow and rainwater from covering a surface of the earthing blade moving contact, and moves away from the earthing moving contact in the closed position to enable the earthing blade moving contact to be contacted with the earthing blade static contact.

11. The disconnector of claim 8 , wherein the static contact anti-icing shield has a cross section of arc, inverted U-shape, inverted V-shape, an upper half of a trapezoid or any combination thereof, for reliably shielding the main blade static contact and facilitating fall of ice and snow and rainwater therefrom.

12. The disconnector of claim 11 , wherein the disconnector further comprises an additionally mounted earthing switch including an earthing blade static contact, an insulator, an earthing blade, an earthing blade moving contact and a base, and the earthing switch further comprises an earthing blade anti-icing arrangement comprises an earthing blade anti-icing shield and an earthing blade anti-icing shield transmission arrangement, wherein
the earthing blade anti-icing shield transmission arrangement is adapted for driving the earthing blade anti-icing shield such that the earthing blade anti-icing shield shields the earthing blade moving contact in the opened position to keep ice and snow and rainwater from covering a surface of the earthing blade moving contact, and moves away from the earthing moving contact in the closed position to enable the earthing blade moving contact to be contacted with the earthing blade static contact.

Assignees

• Abb Schweiz Ag

Inventors

• Zhang Jian
• Wang Han
• Liu Xuan

Classifications

• H01H31/36

  Contact moved by pantograph · CPC title

• H01H31/003

  Earthing switches (H01H31/02 - H01H31/26 take precedence; contact made by liquid jet H01H29/32; for substations H02B1/16, H02B5/01; for withdrawable switchgear H02B11/28; for gas-insulated switchgear H02B13/075) · CPC title

• H01H3/46

  using rod or lever linkage, e.g. toggle · CPC title

• H01H2223/044

  Protecting cover · CPC title

• H01H1/64 Primary

  Protective enclosures, baffle plates, or screens for contacts · CPC title