Switch device

Patent metadata

Field	Value
Publication number	US-11488790-B2
Application number	US-202117172157-A
Country	US
Kind code	B2
Filing date	Feb 10, 2021
Priority date	Nov 30, 2020
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

Embodiments of the present disclosure relate to a switch device, comprising: a first three-position switch; a second three-position switch disposed below the first three-position switch; a circuit breaker disposed between the first three-position switch and the second three-position switch. A first interlock unit is disposed above the circuit breaker and connected to the circuit breaker and the first three-position switch, and configured to block a manual operation of the first three-position switch in a closed state of the circuit breaker, and configured to block a manual closing operation of the circuit breaker while the first three-position switch is manually operated in an open state of the circuit breaker. A second interlock unit is disposed below the circuit breaker and connected to the circuit breaker and the second three-position switch, and is configured to block a manual operation of the second three-position switch in the closed state of the circuit breaker, and configured to block a manual closing operation of the circuit breaker while the second three-position switch is manually operated in the open state of the circuit breaker.

First claim

We claim:

1. A switch device, comprising:
a first three-position switch;
a second three-position switch disposed below the first three-position switch;
a circuit breaker disposed between and coupled to the first three-position switch and the second three-position switch, wherein the first three-position switch is configured to implement bus coupling, and the second three-position switch is configured to implement bus rising;
a first interlock unit disposed above the circuit breaker and coupled to the circuit breaker and the first three-position switch, and configured to block a manual operation of the first three-position switch in a closed state of the circuit breaker, and configured to block a manual closing operation of the circuit breaker while the first three-position switch is manually operated in an open state of the circuit breaker; and
a second interlock unit disposed below the circuit breaker and coupled to the circuit breaker and the second three-position switch, and configured to block a manual operation of the second three-position switch in the closed state of the circuit breaker, and configured to block a manual closing operation of the circuit breaker while the second three-position switch is manually operated in the open state of the circuit breaker, wherein the first interlock unit and the second interlock unit are respectively configured to switch between a locked position and a released position, wherein at the locked position, the manual operation of the first three-position switch and the second three-position switch is not allowed, and at the released position, the manual operation of the first three-position switch and the second three-position switch is allowed, and the circuit breaker comprises a rotatable main shaft, the first interlock unit and the second interlock unit are each selectively engaged with the rotatable main shaft, and are respectively configured to: when the circuit breaker is closed, the first interlock unit and the second interlock unit are locked by the rotatable main shaft to be at the locked position to block the manual operation of the first three-position switch and the second three-position switch, and when the circuit breaker is opened, the first interlock unit and the second interlock unit are released by the rotatable main shaft to be at the released position to allow the manual operation of the first three-position switch and the second three-position switch.

2. The switch device according to claim 1 , wherein each of the first three-position switch and the second three-position switch comprises: a first operation opening configured to permit manual implementation of a disconnection operation; a second operation opening configured to permit manual implementation of an earthing operation; and an access cover configured to be capable of being actuated to switch between a first position and a second position, where at the first position, the access cover covers both the first operation opening and the second operation opening, and at the second position, the access cover opens one of the first operation opening wand the second operation opening.

3. The switch device according to claim 2 , wherein the first interlock unit comprises a first transmission mechanism, the second interlock unit comprises a second transmission mechanism, and the first transmission mechanism and the second transmission mechanism are connected to the corresponding access cover and capable of moving synchronously with the corresponding access cover, the first transmission mechanism and the second transmission mechanism are respectively configured to: be locked when the circuit breaker is closed, so that the access cover cannot be switched to the second position; and be released when the circuit breaker is opened, and be actuated while the access cover is switched to the second position, so that the circuit breaker cannot be closed.

4. The switch device according to claim 3 , wherein the first three-position switch further comprises a first access cover rotating shaft, the access cover of the first three-position switch is fixedly mounted on the first access cover rotating shaft, and the first access cover rotating shaft is configured to be capable of being rotated so that the access cover of the first three-position switch is switched between the first position and the second position, the first transmission mechanism of the first interlock unit comprises: a first link mechanism coupled to the first access cover rotating shaft and including a vertical extension, and configured to move synchronously with the first access cover rotating shaft; and a pivotable link configured to be capable of pivoting about an axis under actuation of the first link mechanism.

5. The switch device according to claim 4 , wherein a first bi-link is fixedly provided on the rotatable main shaft, and the first bi-link comprises two links spaced apart from each other by a certain space, wherein the first bi-link is configured to: limit the vertical extension between the two links when the circuit breaker is closed, so that the first link mechanism cannot move, and thus the access cover of the first three-position switch cannot be switched to the second position, and release the vertical extension when the circuit breaker is opened, so that the access cover of the first three-position switch can be moved to the second position and the first link mechanism can move to actuate the pivotable link to pivot about the axis.

6. The switch device according to claim 5 , wherein the circuit breaker comprises a closing button, and the first interlock unit further comprises a first linkage mechanism linked with the closing button, and the first linkage mechanism is configured to be capable of being engaged with the pivotable link when the circuit breaker is opened, so that the closing button cannot be pressed.

7. The switch device according to claim 6 , wherein the first link mechanism comprises: a lever having a first end fixedly coupled to the access cover rotating shaft to swing under the rotation actuation of the access cover rotating shaft; a first fixed pin fixedly disposed in the switch device; and a first slider supported by the first fixed pin and including the vertical extensions, the first slider accommodating a second end of the lever and configured to slide horizontally along the first fixed pin as the lever swings.

8. The switch device according to claim 7 , wherein the first slider comprises an elongated slot and a V-shaped slot, and the first fixed pin is located in the elongated slot, and a first end of the pivotable link is engaged with the V-shaped slot, when the access cover of the first three-position switch is at the first position, the first fixed pin is located in the middle portion of the elongated slot, and the first end of the pivotable link is located in the middle portion of the V-shaped slot, and the second end of the pivotable link is not engaged with the first linkage mechanism, when the access cover of the first three-position switch is at the second position, the first fixed pin is located at an end of the elongated slot, and the first end of the pivotable link is located at an end of the V-shaped slot and is actuated by the end of the V-shaped slot to pivot the second end of the pivotable link into engagement with the first linkage mechanism.

9. The switch device according to claim 5 , wherein the second three-position switch further comprises a second access cover rotating shaft, the access cover of the second three-position switch is fixedly mounted on the second access cover rotating shaft, and the second access cover rotating shaft is configured to be capable of being rotated so that the access cover of the second three-position switch

Assignees

• Abb Schweiz Ag

Inventors

• Yan Congming
• Chen Xingjie
• Huang Liqun
• Yang Huihuang
• Xiao Ziying

Classifications

• H01H31/10

  for interlocking two or more switches · CPC title

• H01H71/1009

  Interconnected mechanisms (H01H71/1045 takes precedence; operated by excess current and other electrical conditions H01H83/20) · CPC title

• H01H33/52 Primary

  for interlocking two or more switches · CPC title

• H01H33/6661

  Combination with other type of switch, e.g. for load break switches (H01H33/143, H01H33/6662 take precedence) · CPC title

• H01H71/02

  Housings; Casings; Bases; Mountings · CPC title