Withdrawable interlock device of vacuum circuit breaker

Patent metadata

Field	Value
Publication number	US-9825439-B2
Application number	US-201514749400-A
Country	US
Kind code	B2
Filing date	Jun 24, 2015
Priority date	Nov 28, 2014
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

As described above, a withdrawable interlock device of a vacuum circuit breaker according to the present disclosure may locate the second lever between the link and the moving plate, and thus the second lever may be engaged with an outer side of the first lever in a state that the control power connector is coupled to the control power plug not to move the moving plate through the second lever so as to maintain a state that the fitting protrusion is fitted into the fitting groove, thereby having an effect of preventing the circuit breaker body from being separated to the outside of the cradle in a state that the control power connector is coupled to the control power plug to supply power.

First claim

What is claimed is:

1. A withdrawable interlock device of a vacuum circuit breaker comprising a switchboard provided with a control power plug; a circuit breaker body provided with a control power connector detachably connected to the control power plug; a cradle inserted into the switchboard and a carriage moving within the cradle in a state that the circuit breaker body is mounted thereon, the withdrawable interlock device comprising:
a link configured to move according to whether the control power plug is attached to or detached from the control power connector;
a link connector connected to the link to move in linkage with movement of the link;
a first lever connected to the link connector to rotate by a first predetermined angle according to movement of the link connector;
a moving plate provided in the carriage to move; and
a second lever located between the link and the moving plate, and one side of which is located close to the first lever according to rotation by a second predetermined angle to limit rotation of the first lever or other side of which pushes the moving plate while at the same time releasing a close location between the one side and the first lever.

2. The withdrawable interlock device of claim 1 , wherein an elastic member is provided within the cradle to be separated from the second lever by a predetermined distance, and an elastic member connecting plate is formed on an other side of an outer surface of the second lever to be connected to the elastic member, and when the second lever rotates along rotation of the rotating member the second lever receives an elastic restoring force to a position prior to being rotated through the elastic member while at the same time releasing a close location between the second lever and the first lever.

3. The withdrawable interlock device of claim 1 , wherein a moving control stopper is provided on an inner surface of the moving plate to rotate in a state that an other side of an inner surface of the second lever is in close contact with the moving control stopper and push the moving control stopper so as to move the moving plate.

4. The withdrawable interlock device of claim 3 , wherein a fixed plate is provided in proximity of the first lever, and a moving groove is formed on the fixed plate to rotate the second lever in a state that the second lever is fitted into the moving groove.

5. The withdrawable interlock device of claim 3 , wherein a rotating control plate is located in contact with the first lever to limit a rotation of the second lever in a state that the first lever is rotated and is further formed on one side of an upper surface of the second lever.

6. The withdrawable interlock device of claim 3 , wherein the link connector comprises an upper plate formed in a vertical direction to be connected to a lower portion of the link, a middle plate extended to the upper plate to be bent in a horizontal direction, and a lower plate extended to the middle plate to be bent in a vertical direction and formed with a rotating control groove, and the first lever comprises a front plate and a lateral plate formed perpendicular to a lateral surface of the front plate, and a fastening member passes through the rotating control groove in a state that the lateral plate is in close contact with an inner surface of the lower plate to rotate the first lever along movement of the link connector in a state that the first lever is connected to the link connector.

7. The withdrawable interlock device of claim 6 , wherein the rotating control groove is formed such that a transverse diameter thereof is greater than a longitudinal diameter thereof.

8. The withdrawable interlock device of claim 6 , wherein a first lever supporting member located in close contact with the lateral plate is provided adjacent to the lower plate, and a through hole is formed on the first lever supporting member, and an aperture is formed on the lateral plate at a position corresponding to the through hole, and a fastening member passes through the through hole and the aperture in a state that the first lever supporting member is in close contact with the lateral plate to rotate the first lever in a state that the first lever supporting member is fixed to the lateral plate.

9. The withdrawable interlock device of claim 1 , wherein a base frame on which the circuit breaker body moves is provided in the cradle, and a lateral plate formed with a fitting groove is provided at first and second sides of the base frame, and a fitting protrusion is formed at one side of the moving plate, and thus the moving plate moves to fit the fitting protrusion into the fitting groove when the second lever rotates to release a close location between the one side of the second lever and the first lever, and the moving plate moves to separate the fitting protrusion from the fitting groove when the second lever rotates to allow the one side of the second lever to be close to the first lever.

10. The withdrawable interlock device of claim 9 , wherein a rotating member is provided at an upper side of the moving plate, and the rotating member is formed with a horizontal plate and a vertical plate perpendicular to the horizontal plate, and the vertical plate is located in close contact with an other side of an outer surface of the second lever to rotate the rotating member in a state that the vertical plate is in close contact with the second lever so as to move the moving plate while at the same time rotating the second lever.

11. The withdrawable interlock device of claim 10 , wherein a handle portion is further formed at one side of the horizontal plate.

Assignees

• Lsis Co Ltd

Inventors

• Yang Hong Ik
• Lee Han Joo
• Jo Jun Youn
• Ahn Kil Young

Classifications

• H01H33/66

  Vacuum switches · CPC title

• H02B11/133 Primary

  with interlock · CPC title

• H01H33/46

  Interlocking mechanisms · CPC title