KR100516222B1 - Structure of automatic trip of vacuum circuit breaker - Google Patents

Abstract

The present invention relates to an automatic tripping structure of a vacuum circuit breaker, and is configured to be cut off by a mechanical mechanism when a user accidentally attempts to take out the operation during the input and operation of the circuit breaker, thereby improving the convenience of the user and the user's sound. You can immediately hear the breaker operating status by listening to.

The automatic trip structure of the vacuum circuit breaker according to the present invention for this purpose is a vacuum circuit breaker including a mechanism assembly for providing the mechanical energy of the input and interruption of the circuit breaker and a bogie unit located at the bottom of the mechanism assembly to perform the draw-out operation of the circuit breaker The locking mechanism has a plurality of protrusions formed so that the mechanism assembly is tripped by a mechanical mechanism when an attempt is made to take out the operation of the circuit breaker during insertion and operation of the circuit breaker, and prevents the input by a mechanical mechanism when an attempt is made to electrically or mechanically input the circuit breaker. Characterized in that it comprises a bar.

Description

STRUCTURE OF AUTOMATIC TRIP OF VACUUM CIRCUIT BREAKER}

The present invention relates to an automatic trip structure of a vacuum circuit breaker, and more particularly, to an automatic trip structure of a vacuum circuit breaker having a user's convenience by mechanically configuring the circuit breaker to be automatically cut off without a manual or electrical interruption process when the circuit breaker is pulled out. will be.

In general, since a vacuum circuit breaker is stored and operated in a high-voltage switchgear, various safety devices and mechanical and electrical interlock devices are provided within the vacuum circuit breaker.

In order to prevent electric shock accidents, switchboard burnout accidents, and power failure accidents caused by misoperation of the equipment operator or inexperienced users, the vacuum circuit breaker is designed to prevent the inflow and outflow during the input and the inflow and outflow during the drawing operation.

Conventional circuit breakers are designed so that when the user pulls out the circuit breaker during operation / injection, the mechanical interlock is caught so that the circuit breaker cannot be pulled out.

1 is a block diagram showing a trip structure of a vacuum circuit breaker according to the prior art.

In the prior art configuration, as shown in FIG. 1, there is a main shaft 1 across the lower portion of the vacuum circuit breaker, and a lead-out interlock assembly (not shown) is assembled in front of it. do. A supporting plate 6 is assembled on both sides of the lower frame and an interlock bar 2 is inserted into a hole (not shown) of the supporting plate 6 to support and Receive guidance.

The bracket (5) is assembled by fastening the bolt (not shown) to the supporting plate (6) and the upper part of the interlock bar (2) is inserted into the hole (5a) of the bracket (5) We are guided.

A spring (Spring) for the handle (3) is assembled perpendicular to the interlock bar (2) so that the interlock bar (2) can be operated up and down and the interlock bar (2) operated upwards to return. 7) is assembled to the interlock bar 2 by a spring pin 8.

Then, an operating lever 4, which is a directly related component of the draw-out prevention function, is welded to the interlock bar 2 during feeding.

A socket wrench bolt 9 is fastened to the main shaft 1 so that the vacuum breaker directly contacts the operating lever 4 during the closing operation to perform a draw-out prevention function during the closing of the breaker. .

2A is a side view of FIG. 1, and FIG. 2B is a front view of FIG. 1.

3A is an operation state diagram showing a blocking state of a vacuum circuit breaker according to the prior art, and FIG. 3B is an operation state diagram showing an input state of a vacuum circuit breaker according to the prior art.

When the vacuum circuit breaker is inserted or blocked, as shown in FIGS. 2 and 3, the main shaft 1 rotates in the direction of the arrow of the figure.

When the breaker is in a blocked state, as shown in FIG. 2B, when the user grabs the handle 3 by hand and lifts it up, the interlock bar 2 also rises and is attached to a cradle (not shown). The breaker body can be pulled out and pulled out of a hole (not shown) of an interlock plate.

That is, the operating lever 4 welded to and attached to the interlock bar 2 also rises at the same time as the interlock bar 2 rises, the socket wrench being fastened to the main shaft 1 during an ascending operation. It does not interfere with the bolt 9 and smoothly rises to the maximum stroke.

Thus, the user pulls in and pulls out the breaker in the state in which the handle 3 is lifted up in the breaker blocking state.

When the handle 3 is released after pulling in and out, the interlock bar 2 returns to its original state by the weight of the spring and the return force of the spring 7, as shown in FIG. 2B.

Next, the circuit breaker closing state will be described with reference to FIG. 3B.

As shown in FIG. 3B, the main shaft 1 rotates in the direction of the arrow, and accordingly the socket wrench bolt 9 also faces downward. At this time, when the user grabs the handle 3 and lifts it up from the front of the breaker, the operating lever 4 rises up and cannot be caught by the socket wrench bolt 9. In this case, the interlock bar 2 does not go up, and the bottom of the interlock bar 2 does not escape from the interlock plate hole of the cradle, but is caught in the hole, and the vacuum breaker draw-out You will not be able to perform the operation. That is, the draw-out operation cannot be performed in the breaker closing state.

According to the automatic trip structure of the vacuum circuit breaker according to the prior art having the above configuration, when the vacuum circuit breaker during operation / injection is to be drawn out by a user's judgment and error, the circuit breaker may not be pulled in or out during the input. There was a cumbersome problem of having to withdraw after the electrical cut off.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is configured to be cut off by a mechanical mechanism when the user accidentally attempts to take out the operation during the input and operation of the circuit breaker. It is to provide an automatic trip structure of the vacuum circuit breaker with increased.

Automatic trip structure of the vacuum circuit breaker according to the present invention for achieving the above object,

In the vacuum circuit breaker comprising a mechanism assembly for providing the mechanical energy of the input and interruption of the circuit breaker and a bogie located at the bottom of the mechanism assembly for performing the draw-out operation of the circuit breaker,

The mechanism assembly includes a locking bar having a plurality of protrusions to be tripped by a mechanical mechanism when an attempt is made to take out the operation of the circuit breaker during insertion and operation of the circuit breaker and to prevent the input by a mechanical mechanism when an attempt is made to electrically or mechanically input the circuit breaker. Characterized in that configured.

The mechanism assembly raises the locking bar vertically as the interlock bar is raised when the drawer lever is raised during the input and operation of the breaker, whereby the first protrusion formed on the locking bar pushes the trip lever to the trip lever axle. And rotate the trip latch at the same time so as to block the breaker while releasing the trip latch roller from being held by the trip latch.

The mechanism assembly raises the locking bar vertically as the interlock bar is raised when the drawer lever is raised during the closing and operation of the breaker, whereby the second projection formed on the locking bar comes to the right side of the closing latch pin so that the closing latch lever is closed. It is characterized in that it is not possible to rotate around the axle to prevent electrical and mechanical input during drawer in and out of the breaker.

The mechanism assembly raises the locking bar vertically as the interlock bar is raised when the pull-out lever is raised during the input and operation of the breaker, thereby switching the internal contact of the micro switch by pushing the micro switch roller with the third protrusion formed on the locking bar. It is characterized in that to prevent the electrical input during the drawer in and out of the breaker.

Hereinafter, preferred embodiments of the present invention as described above will be described in more detail with reference to the accompanying drawings.

4 is a schematic external view of a vacuum circuit breaker to which the present invention is applied.

In FIG. 4, a part having a locking bar 31 provides a mechanical energy of inputting and blocking a breaker to a mechanism assembly, and a lower portion thereof is a bogie for performing a breaker pull-out operation. The part with the mechanism assembly is the front of the breaker and the part with the main circuit is the back of the breaker.

Here, reference numeral 32 denotes an interlock bar, and reference numeral 33 denotes a drawer lever.

FIG. 5 is a rear view of the mechanism assembly as seen from arrow A of FIG. 4.

FIG. 6 is an assembly view of the control device 50 shown in FIG. 5 viewed from the front of the breaker, and FIG. 7 is a three-dimensional view of the control device 50 shown in FIG. Here, FIG. 7 shows the control device 50 from behind.

As shown in FIGS. 5 to 7, the mechanism assembly includes a closing latch lever 21, a closing latch pin 21a, a closing roller 22, and a closing latch axle. latch axle (23), trip lever (24), trip lever axle (25), trip latch (26), trip latch pin (26a) , Trip latch axle (27), torsion sping (28), closing coil (29), trip coil (30), locking bar (31), interlock bar (Interlock bar) 32, the draw-out lever 33, the micro switch 34, and the trip latch roller 35 are comprised.

The control device 50 has an input latch and a trip latch to control the circuit breaker closing and closing manually or electrically.

8 is a functional explanatory diagram of a locking bar used in the present invention.

As shown in FIG. 8, the locking bar 31 integrally forms the first to third injection preventing protrusions 31a to 31c.

The locking bar 31 is a core component that performs the draw-out interlock function, and performs the following three important interlock functions by the first to third protrusions 31a to 31c while vertically moving.

First, the first protrusion 31a functions to trip when a mechanical closing operation is attempted while closing the breaker. Secondly, the second protrusion 31b attempts an electrical and mechanical closing operation during drawing out of the breaker. The third protrusion 31c performs a function of preventing the closing of the circuit board when the electrical closing operation is attempted while the breaker is pulled in and out.

Then, the automatic trip structure of the vacuum circuit breaker according to the present invention having the above configuration will be described.

First, referring to FIG. 4, when the draw-out lever 33 is raised, the interlock bar 32 also rises, and the locking bar 31 connected by a nut at its end also moves vertically while interlocking. The breaker is withdrawn. On the contrary, if the take-out lever 33 is released, it can be returned to its original state by the weight of the own weight and the spring, and the breaker can be stopped from being pulled out.

A detailed description of the interlock function will be described with reference to FIGS. 6 and 7.

First, in the closing operation of the breaker, when the closing coil 29 is excited, the closing latch lever 21 rotates upward with the closing latch axle 23 as the center of rotation, and the closing roller 22 moves downward. The breaker is closed by releasing the closing latch while rotating in the direction.

Next, the blocking operation of the circuit breaker when the trip coil 30 is excited, the trip lever 24 rotates the trip lever axle 25 upwards at the center of rotation and simultaneously rotates the trip latch pin 26a. By rotating the trip latch 26 upward, the trip latch 26 is released to block the breaker. After the tripping, the trip latch 26 rotates downward by the return force of the torsion spring 28 and returns to its original position.

Next, with reference to the functional description of the locking bar 11 in FIG.

In FIG. 4, the interlock bar 32 is freely lowered due to its own weight in the closing state of the breaker. At this time, if the user raises the draw-out lever 33 in order to draw out by a wrong operation, the interlock bar 32 also goes up.

Referring to FIG. 5 again, as the interlock bar 31 is raised, the locking bar 31 is also vertically raised. At this time, the first protrusion 31a of FIG. 8 is pushed up, and the trip lever 24 rotates the trip lever axle 25 to the center of rotation and simultaneously the trip latch 26 to the upward direction. By rotating, the trip latch 26 no longer holds the trip latch roller 35 and is released while the breaker is blocked. In other words, if you try to take out the breaker while the circuit breaker will be tripped.

Next, another function of the locking bar 31 will be described.

The third protrusion 31c of FIG. 8 switches the internal contact of the micro switch 34 while pushing the roller of the micro switch 34 to the right while the locking bar 31 is vertically raised. It performs electrical input prevention function during draw in and out.

In addition, the function of the second protrusion 31b of FIG. 8 is that the locking bar 31 moves upward when the first protrusion 31a comes to the right side of the closing latch pin 21a while pulling in and out. The lever 21 makes the closing latch axle 23 unable to rotate at the center of rotation. In other words, even if the electrical and mechanical closing operation during breaker draw-in and draw-out is to prevent the closing.

Preferred embodiments of the present invention as described above are disclosed for the purpose of illustration, and those skilled in the art will be able to make various modifications, changes, additions, etc. within the spirit and scope of the present invention, such modifications and changes are defined in the following claims It should be seen as belonging.

As described above, according to the automatic trip structure of the vacuum circuit breaker according to the present invention, the user can increase the convenience of the user by immediately blocking the circuit breaker when the input circuit breaker is attempted to take out the operation, and the user hears the interruption sound and immediately operates the circuit breaker. I can figure it out.

In the prior art, it takes a while to determine the state of the circuit breaker when the user does not draw in and out during the input due to the determination and error, but in the present invention, the user can immediately recognize that the circuit breaker has been incorrectly operated.

1 is a block diagram showing a trip structure of a vacuum circuit breaker according to the prior art

2A is a side view of FIG. 1

FIG. 2B is a front view of FIG. 1

Figure 3a is an operating state diagram showing a blocking state of the vacuum circuit breaker according to the prior art

Figure 3b is an operating state diagram showing the input state of the vacuum circuit breaker according to the prior art

4 is a schematic outline view of a vacuum circuit breaker to which the present invention is applied.

5 is a rear view of the mechanism assembly as seen from arrow A of FIG.

FIG. 6 is an assembled view of the control device shown in FIG. 5 viewed from the front of the breaker; FIG.

FIG. 7 is an isometric view of the control device shown in FIG. 6.

Figure 8 is a functional diagram of the locking bar (Locking bar) used in the present invention

<Explanation of symbols for the main parts of the drawings>

21: closing latch lever 21a: closing latch pin

22: feed roller 23: feed latch axle

24: trip lever 25: trip lever axle

26: trip latch 26a: trip latch pin

27: trip latch axle 28: torsion spring

29: input coil 30: trip coil

31: locking bar 32: interlock bar

33: drawout lever 34: micro switch

35: trip latch roller

Claims (4)

In the vacuum circuit breaker comprising a mechanism assembly for providing the mechanical energy of the input and interruption of the circuit breaker and a bogie located at the bottom of the mechanism assembly for performing the draw-out operation of the circuit breaker, The mechanism assembly includes a locking bar having a plurality of protrusions to be tripped by a mechanical mechanism when an attempt is made to take out the operation of the circuit breaker during insertion and operation of the circuit breaker and to prevent the input by a mechanical mechanism when an attempt is made to electrically or mechanically input the circuit breaker. Automatic trip structure of the vacuum circuit breaker, characterized in that configured. The method of claim 1, wherein the mechanism assembly, When the drawer lever is raised during the operation of the breaker, the interlock bar is raised to raise the locking bar vertically, whereby the first protrusion formed on the locking bar pushes the trip lever to rotate the trip lever around the trip lever axle, And at the same time to rotate the trip latch to release the trip latch roller so that the trip latch cannot be held by the trip latch, thereby blocking the breaker. The method of claim 2, wherein the mechanism assembly, When the drawer lever is raised during the closing and the operation of the breaker, the interlock bar is raised to raise the locking bar vertically, whereby the second protrusion formed on the locking bar comes to the right side of the closing latch pin and the closing latch lever is centered on the closing latch axle. Automatic tripping structure of a vacuum circuit breaker, characterized in that the rotation of the circuit breaker to prevent electrical, mechanical input during the drawer in and out. The method of claim 1 or 2, wherein the mechanism assembly, When the drawer lever is raised during the input and operation of the breaker, the interlock bar is raised to raise the locking bar vertically, whereby the third protrusion formed on the locking bar pushes the micro switch roller to switch the internal contact of the micro switch to draw in and out of the breaker. Automatic trip structure of the vacuum circuit breaker, characterized in that to prevent the electrical input.