JP2004048992A - Position indicating device for draw-out type circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a position indicating device for a draw-out type circuit breaker capable of indicating the position of a breaker unit reliably. <P>SOLUTION: An operating plate 37 is provided that is locked by the locking piece 29 of a draw-out frame on the base plate 35 mounted on the breaker unit in such a way as to be freely slidable. An indicator 33 is provided on the arm of an operating lever 38 provided with an actuating pin 42 that engages the operating groove 44 of the actuating plate. The groove 44c of the operating plate 37 that the operating pin 42 engages while the breaker unit moves at a testing position is formed in such a way as to cross at nearly right angles in the moving direction of the breaker unit, compared with the groove 44b for the movement of the breaker unit between the breaking position and the testing position and the groove 44d for the movement of the unit between the testing position and a connecting position. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a draw-out type circuit breaker, and more particularly to a position display device of the circuit breaker body.
[0002]
[Prior art]
The drawer-type circuit breaker includes a drawer frame attached to a switchboard and the like, and a breaker body that is linearly movable between a connection position, a test position, and a disconnection position in the drawer frame. The drawer frame is provided with a main circuit terminal to which the main circuit wire is connected and an auxiliary circuit terminal to which the auxiliary circuit wire for control and operation is connected. Make contact with contacts and auxiliary circuit contacts. In the test position, the main circuit terminal and the main circuit contact do not contact each other, but the auxiliary circuit does. Further, at the disconnection position, neither the main circuit nor the auxiliary circuit comes into contact.
[0003]
This draw-out type circuit breaker is used for the purpose of safely and continuously supplying a large value of rated current to the main circuit at the connection position, or for short-time and safely supplying short-circuit current sometimes reaching several hundred thousand amps. In addition, it is necessary that a large contact pressure is generated between the main circuit terminal and the main circuit contact. On the other hand, in the disconnection position, the main circuit contact and the auxiliary circuit contact should be separated from the main circuit terminal and the auxiliary circuit terminal of the draw-out frame by a sufficiently large insulation distance so that the breaker body is reliably insulated from the electric circuit. Need to be configured. In the test position, a sufficient insulation distance must be maintained between the main circuit contact and the main terminal, but since a large current does not flow through the auxiliary circuit, the auxiliary circuit terminal and the auxiliary circuit contact There is no need to generate a large contact pressure between them.
[0004]
When the circuit breaker body of such a draw-out type circuit breaker is inserted from the disconnection position to the connection position, the moving distance is long but can be inserted with little resistance without any resistance until the main circuit contact contacts the main circuit terminal. . However, it is necessary to move the circuit breaker body further from the position where both contacted so that the contact pressure is maintained even if the contact surface where they contact is worn or deformed. Requires a large operating force. Then, the position inserted in this manner becomes the connection position.
[0005]
Conventional drawer-type circuit breakers use a worm gear as the drawer insertion mechanism that moves the breaker body, and the travel distance of the breaker body is almost proportional to the number of rotations of the worm gear, that is, the number of handle rotations by the operator. It was a structure to do. This draw-out insertion mechanism allows the insertion operation in which the main circuit contact comes into contact with the main circuit terminal and then to the connection position, the movement distance is small, but a large contact pressure is applied with a reasonable operating force. Worm gears were selected so that the number of rotation operations was large for the distance traveled. However, such a structure has a problem in that the number of rotation operations of the worm gear is considerably increased for a long distance movement from the disconnection position to the contact between the two.
[0006]
A drawer-type circuit breaker having a drawer insertion mechanism that solves such operational problems has been proposed by the present applicant. This drawer-type circuit breaker has a structure in which the insertion speed of the circuit breaker main body is changed halfway even if the drawer operation handle is operated at a constant speed. Simple configuration with just a screw that can be inserted with a large moving distance with a small number of rotations, and insertion with a small number of rotations with a large number of rotations in the insertion operation from just before the contact pressure is applied until the connection position is reached It has a combination structure using a large lever so that it can be used.
However, in the latter drawer-type circuit breaker, since the movement distance of the circuit breaker main body between the position where the main circuit terminal and the main circuit contact are in contact and the connection position is small, the operator needs to operate the position display device. Unless the indicators are correctly fitted, there is a problem that a sufficient contact pressure cannot be obtained.
[0007]
[Problems to be solved by the invention]
In the disconnection position or the test position of such a drawer-type circuit breaker, it is necessary to maintain an appropriate insulation distance between the auxiliary circuit contact and the auxiliary circuit terminal or between the main circuit contact and the main circuit terminal. In particular, in the test position, if the breaker body is too close to the disconnection position, the auxiliary circuit contact will not reliably contact the auxiliary circuit terminal, and if too close to the connection position, the main circuit contact and main circuit terminal will Is limited from both sides of the disconnection position side and the connection position side such that the insulation distance of the connection is insufficient. Further, in the operation of inserting the drawer-type circuit breaker, the operator needs to move the circuit breaker body to a position satisfying the above-described condition while looking at the indicator 33 and the scale from a position several tens of centimeters apart. Needs a moderate width.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a drawer-type circuit breaker position display device in which the insertion operation is simple and the position of the breaker body can be reliably displayed.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a position display device of a drawer-type circuit breaker according to the invention according to claim 1 includes a drawer frame having a main circuit terminal and an auxiliary circuit terminal, and a main circuit terminal and a main circuit terminal. According to the position of the breaker body of the drawer-type circuit breaker, which includes a main body contact and an auxiliary circuit contact that are respectively connected to and separated from the auxiliary circuit terminal, and a drawer insertion mechanism that moves the main body. A position display device that indicates that the circuit breaker body has reached a predetermined position by a display member that is displaced.The display member has a plurality of engagement edges having an angle that intersects the moving direction of the circuit breaker body. Displaced by the engaging edge member and the sliding member that slides on each engaging edge relative to each other, and blocked by the display member when the sliding member slides on the predetermined engaging edge having a predetermined length. The container body is in the predetermined position Is displayed, one of the engaging edge member and the sliding member is provided so as to move together with the breaker main body in the insertion operation and the other does not move, and the breaker main body is moving at the predetermined position. The predetermined engaging edge on which the sliding member slides is more than the other engaging edge on which the sliding member slides when the circuit breaker body moves back and forth around the predetermined position. It intersects at an angle that is more orthogonal to the direction of movement of the main body.
[0009]
With such a configuration, the crossing angle between the engaging edge when moving the circuit breaker body at a predetermined position such as the disconnection position and the test position and the moving direction of the circuit breaker body is determined by the engagement before and after the predetermined position. Since the edge is larger than the intersection angle between the moving direction of the circuit breaker body and the former, the displacement amount of the display means per unit movement distance of the circuit breaker body is larger than the latter, and the displacement of the display means with respect to the same scale width indicated by the display member is larger. Variations in the position of the breaker body are reduced.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a position display device for a drawer-type circuit breaker according to the present invention will be described with reference to examples.
FIGS. 1 to 3 are side views of a drawer-type circuit breaker employing the position display device according to the present embodiment. The breaker is movable in the left-right direction along a drawer frame 1 and a side plate 2 of the drawer frame 1. And a main body 3. Main circuit terminals 5 and 6 are attached to a drawer frame 1 on a terminal block 4 made of an insulating molded product, and an auxiliary terminal block 8 having an auxiliary circuit terminal 7 is provided on a side plate 2. The circuit breaker body 3 includes an opening / closing mechanism (not shown) for opening / closing the opening / closing contact, a main circuit contact 11 rotatably held by a shaft 10 so as to come into contact with one of the opening / closing contacts 9, and a main circuit contact 11 And a main circuit contact spring 12 for making the main circuit terminal 6 always contact the opening / closing contact 9 and making the main circuit terminal 5 freely contactable. Since the main circuit terminal 6 is completely the same, the main circuit terminal 5 will be described below. The contact spring 12 is provided between the main circuit contact 11 and the main circuit terminal 5 so that the rated current of the circuit breaker can be continuously and stably supplied or a large short-circuit current can be supplied without any trouble for a short time. A member having a large acting force such that a large contact pressure is generated therebetween is selected. The circuit breaker body further includes an auxiliary circuit contact block 14 having an auxiliary circuit contact 13.
[0011]
The circuit breaker main body 3 of the drawer-type circuit breaker has a drawer roller 19 rotatably provided outside thereof fitted between upper and lower rails 20 attached to the inside of the side plate 2 of the drawer frame 1. It is movable along this rail 20.
[0012]
The structure of the drawer insertion mechanism for inserting and pulling out the circuit breaker body 3 will be described with reference to FIGS. The drawer insertion mechanism includes a drawer operation bolt 21 provided in the circuit breaker body 3 and having a left-right axial direction, and a frame-shaped drawer operation bolt holding frame 22 fixedly attached to the circuit breaker body 3. A drawer operating shaft 23 provided at the center of the right end of the circuit breaker main body 3; and a drawer operating lever 25 provided in the drawer frame 1 and rotatably provided by a shaft 24; a drawer operating lever 25; It comprises a connecting rod 26 for connecting the bolt 21 and a detachable operating handle 27 for rotating the pull-out operating bolt 21.
[0013]
The pull-out operation bolt 21 includes a large-diameter portion 21 a and a male screw portion 21 b located in the pull-out operation bolt holding frame 22, and is inserted through a hole formed at the right end of the pull-out operation bolt holding frame 22. The male screw 21b is formed on the connecting rod 26 and screwed into the screw 26a. The end of the connecting rod 26 is connected to the pull-out operation lever 25 and the shaft 28 at the connecting end 25a. At the other end of the pull-out operation lever 25, in FIG. 1, a notch formed by a notch 25b substantially in the left-right direction and a notch 25c formed diagonally rightward and downward continuously from the notch 25b is formed. The pull-out operation shaft 23 is engaged with the notch 25b. An engaging piece 29 for operating the position display device of the present embodiment, which will be described later, is formed on the bottom plate of the drawer frame 1 by cutting and bending.
[0014]
The operation of this operation mechanism is as follows. When the operation handle 27 having a hexagonal pillar in FIG. 1 is inserted into a hexagonal hole 21c formed at the left end of the pull-out operation bolt 21 and rotated, the pull-out operation bolt 21 rotates. This rotation does not cause the pull-out operation bolt 21 to move on the circuit breaker body in the left-right direction, but the male thread 21 b is screwed into the female thread 26 a of the connecting rod 26. With this screwing, the drawer operating lever 25 is urged to rotate clockwise, and by this urging, the entire circuit breaker body 3 is pulled upward through the drawer operating shaft 23 in the notch 25b of the drawer operating lever 25. Although it is urged by a force in the direction of F1 so as to be lifted, the pull-out roller 19 is guided by the rail 20, so that it is not lifted and the pull-out operation lever 25 hardly rotates. Therefore, when the male screw part 21b is screwed into the female screw part 26a, the drawer operation bolts 21 move the circuit breaker main body 3 to the right. At this time, since the contact pressure has not yet been generated between the main circuit terminal 5 and the main circuit contact 11, even if the male screw portion 21b and the female screw portion 26a have a relatively large screw pitch, the operation handle 27 The circuit breaker body 3 can be moved with a small rotating operation force. That is, in the insertion operation in which the movement distance is large from the state of FIG. 1 in the first half of the insertion operation to the time just before both contact in FIG. 2, the breaker body 3 becomes large with a small operation force and a small operation rotation speed. Moving. While moving from FIG. 1 to FIG. 2, the auxiliary circuit contact 13 passes through a test position where the auxiliary circuit contact 13 makes sliding contact with the auxiliary circuit terminal 7.
[0015]
In the state of FIG. 2, the pull-out operation shaft 23 is on the boundary between the notch 25b and the notch 25c. At this time, the pull-out operation shaft 23 is urged through the pull-out operation shaft 23 with a force in the direction of F2, and as described above, The power does not contribute to the movement of the circuit breaker main body 3, and the circuit breaker main body 3 moves rightward by the horizontal component FH of F2. By the way, the dimension L1 relating to the rotational moment at the point of application 25d where the force F2 acts is considerably smaller than the dimension L2 relating to the rotational moment at the connecting end 25a to which the rotational driving force of the pull-out operation lever 25 is transmitted. That is, although the pull-out operation lever 25 rotates and the leftward movement distance at the connection end 25a is large, the rightward movement distance at the action point 25d is small, but it acts on the connection end 25a. There is an advantage that a large force acts on the action point 25d even if the force F is small. Therefore, when the insertion operation is continued from the state shown in FIG. 2, the pull-out operation shaft 23 is in a position where it is stuck in the notch 25c, most of the urging force F2 becomes a horizontal component, and the circuit breaker main body 3 moves further rightward. Then, the main circuit terminal 5 comes into contact with the main circuit contact 11. The main circuit contact 11 slides on the tapered portion 5a formed at the corner of the main circuit terminal 5 while resisting a large contact pressure, and the operating handle 27 is operated many times. The circuit breaker main body 3 can be moved to the connection position 3. Although the number of rotation operations is large, there is no problem because the moving distance of the circuit breaker main body 3 from FIG. 2 to FIG. 3 is considerably smaller than the moving distance from FIG. 1 to FIG.
[0016]
4 to 7 are partial views showing the position display device of the present embodiment located at the bottom of the circuit breaker main body. FIG. 4A is a schematic front view of the position display device, and FIG. ) Are views of the position display device as viewed from the bottom, and all show the state of FIG. 1 in which the circuit breaker main body 3 is in the disconnection position. FIGS. 5 to 7 are operation diagrams in which the main parts of FIG. 4 are taken out.
[0017]
In FIG. 4A, "CONN.", "TEST" corresponding to the connection position, test position, and disconnection position of the insertion hole 31 of the operation handle 27 and the breaker body 3 are provided on the front cover 30 of the position display device. In addition, a display window 32 on which characters "ISOLATED" and its scale are displayed is formed, and the position of the breaker main body 3 is displayed by moving the indicator 33 through the display window 32.
[0018]
4B, the pull-out operation bolt holding frame 22 shown in FIG. 1 includes a frame 34 and a base plate 35 serving as a substrate of the position display device. The pull-out operation bolts 21 are formed at bent portions of the base plate 35. It is rotatably held by the bearing hole 35 a and the bearing plate 36. An operation plate 37 is slidably provided on the base plate 35, an operation lever 38 and an operation enlargement lever 39 are rotatably provided, and an indicator plate 40 having an indicator 33 slidably in the left-right direction is provided inside the cover 30. Can be
[0019]
The operation plate 37 is held by fitting a guide projection 35b and a pin 41 formed on the base plate 35 into a long hole 37a and a long hole 37b formed in the moving direction of the circuit breaker main body 3, respectively, and by a spring (not shown). It is urged downward in the figure and stays at the position shown in the figure by the locking piece 29. The operation lever 38 is urged counterclockwise by a spring (not shown), and has an operation pin 42 and a pin 43 on both arms thereof. The operation pin 42 is fitted into an operation groove 44 formed in the operation plate 37 and Reference numeral 43 is fitted in a notch 40a in the vertical direction of the indicator plate 40. The operation expanding lever 39 is urged clockwise by a spring (not shown) to rotatably hold the expanding actuator 46 and includes a pin 45. The expansion actuator 46 extends to the base of the external thread 21 b of the pull-out operation bolt 21 and is slidable substantially in the moving direction of the circuit breaker main body 3.
[0020]
The push lever 47 is biased clockwise by a spring (not shown) to be rotatably held on the operation plate 37, and its right edge bent in a U-shape comes into contact with a pin 48 provided on the base plate 35. Is locked. The operating groove 44 of the operating plate 37 has a groove 44a having a corresponding crossing angle with respect to the moving direction of the circuit breaker main body 3 and a crossing angle smaller than the groove 44a, that is, more parallel to the moving direction of the circuit breaker main body 3. A close groove 44b, a groove 44c having a larger crossing angle than the groove 44a, that is, a groove 44c having an angle closer to being orthogonal, a groove 44d parallel to the moving direction of the circuit breaker body 3, and a circuit breaker body 3 is formed so as to be continuous with a wide groove 44e orthogonal to the moving direction. As shown in FIG. 8 described later, the shape of the operation groove 44 is such that the indicator 33 per unit movement amount of the circuit breaker body 3 when the circuit breaker body 3 moves to the disconnection position, the test position, and the connection position. Is selected so that the amount of displacement of the circuit breaker body 3 is larger than when the circuit breaker body 3 moves from any of those positions to any of the other positions.
[0021]
When the operation handle 27 is rotated from the state shown in FIG. 4 and the drawer operation bolt 21 is rotated to insert the circuit breaker main body 3, the operation plate 37 locked by the locking piece 29 formed on the drawer frame 1 and the operation plate 37. The components other than the push lever 47 held by the operation plate 37 move downward together with the breaker body 3. By this movement, the operation pin 42 moves along the groove 44a → the groove 44b → the groove 44c, and the operation lever 38 rotates clockwise following this movement, and the circuit breaker main body 3 is moved to the test position as shown in FIG. When this occurs, the operation pin 42 is located at the position of the groove 44c, and the indicator 33 indicates the scale of "TEST". When the operation handle is further rotated, the operation pin 42 reaches the intersection of the groove 44c and the groove 44d, and at this time, the indicator 33 indicates an intermediate position between “TEST” and “CONN.”. When the operation handle 27 is further rotated, the operation pin 42 moves along the groove 44d. During this movement, the operation lever 38 does not rotate, and the indicator 33 does not move. During this operation, the right edge of the push lever 47 slides sequentially from the pin 48 to the shaft 49 that supports the operation enlarging lever 39, and then to the pin 45, and rotates clockwise to the state shown in FIG. In the state of FIG. 6, the end surface 26b of the connecting rod 26 is substantially in contact with the end surface 46a of the enlarged actuator. The position of the breaker body 3 at this time is substantially at the connection position shown in FIG.
[0022]
Subsequently, when the operation handle 27 is rotated, the circuit breaker main body 3 hardly moves, but the connecting rod 26 moves upward, and the operation expanding lever 39 is rotated counterclockwise through the expanding actuator 46, and is rotated through the pin 45. By rotating the push lever 47 in the counterclockwise direction, the end surface 26a of the connecting rod 26 comes into contact with the fixed object of the circuit breaker body 3 and the rotation stops. The operation pin 42 is pressed by the left edge of the push lever 47 and largely moves leftward in the groove 44e. As a result, the operation lever 38 rotates clockwise, and the indicator 33 moves from the intermediate position between "TEST" and "CONN." To the position of "CONN." Become. As described above, when the pull-out operation bolt 21 and the connecting rod 26 are screwed by a predetermined amount, the connection position can be reliably displayed.
[0023]
In order to explain the characteristics of the shape of the operation groove 44 considered in order to set the width of the scale indicating that the breaker body of the draw-out type circuit breaker has reached the disconnection position or the test position as rationally as possible. FIG. 8 shows the relationship among the position of the circuit breaker main body 3, the shape of the operation groove 44, the indicator 33, and the position of the scale of the display window 32. In FIG. 8, in addition to the solid line (A) showing the relationship by the operation groove 44, the relationship when the groove is formed so that the indicator 33 moves at a uniform pace according to the amount of movement of the circuit breaker main body 3. Is indicated by a dashed line (B).
[0024]
In FIG. 8, for example, in the case of the test position, when the width of the scale which is considered to be sufficient for the operator is set to ± W from the center position, when the insertion operation is performed so that the indicator 33 is positioned at the outermost position, a solid line ( In the case of the present embodiment shown in A), the circuit breaker main body 3 is located at a position of approximately ± M from the center position of the test position, but when an operation groove for performing the operation of the dashed line (B) is formed, approximately ± N. Thus, the former can move the circuit breaker body 3 to a test position to a position with less variation than the latter, and can reliably perform the contact of the insulation distance and the auxiliary circuit.
[0025]
Next, the display operation when the circuit breaker main body 3 is moved to the connection position is different from the display operation at the test position. In other words, the width of the scale cannot be made sufficiently large in the case of the operating groove which performs the operation shown by the dashed line (B). The reason is that when the operator sets the indicator to the "TEST" side (CT) of the scale width, the circuit breaker main body 3 is located at a position (C ') which is considerably before the correct connection position (C). The contact insertion distance between the circuit terminal 5 and the main circuit contact 11 is not sufficient, and in some cases, the position (C ′) before this is such that the main circuit contact 11 is connected to the main circuit terminal 5 at the tapered portion 5a of the main circuit terminal. It may be the contact position. In this case, a sufficient contact pressure cannot be obtained and the performance as a circuit breaker cannot be sufficiently exhibited.
[0026]
On the other hand, in the case of the solid line (A) indicating the case of the present embodiment, the indicator 33 is intermediate between “TEST” and “CONN.” And “CONN.” Until the circuit breaker main body 3 is substantially at the connection position. , The operator recognizes that the connection position has not been reached and continues operating the operation handle, so that the circuit breaker body is not stopped short of the connection position as described above. Immediately after the indicator 33 reaches the substantial connection position, the indicator 33 immediately moves to the “CONN.” Scale position. In addition, since the indicator 33 does not move at all until it moves at once during this operation, the groove 44d is slightly angled to prevent an operator from illusion that the circuit breaker main body 3 may not move, The indicator 33 may be slightly moved as shown by a two-dot chain line in FIG.
[0027]
Although not directly related to the present application, the shutter plate 50 in FIG. 4 prevents the operator from inadvertently pulling out or inserting the circuit breaker main body 3, and a rightward direction by a spring (not shown). When the operation handle 27 is attached to the pull-out operation bolt 21, the operation handle 27 can be attached by being pushed leftward at the slope end 50 a thereof. At this time, when the switching contact of the circuit breaker main body is in contact, the interlock plate 51 prevents the shutter plate 50 from moving, so that the pull-out or insertion operation cannot be performed. When the opening / closing contact is separated, the interlock plate 51 is retracted downward and can be operated. A hole 21d is formed in the pull-out operation bolt 21, and a pin 52 is held by a lever 53 so as to be freely fitted in the hole 21d. The lever 53 is urged clockwise by a spring (not shown). When the pull-out operation bolt 21 is rotated by vibration or the like in a state where the operation handle 27 is not attached, the pin 52 is automatically fitted into the hole 21d. The body 3 is not inserted or pulled out unintentionally.
[0028]
【The invention's effect】
The present invention is implemented in the form described above, and can reduce the variation in the position of the circuit breaker main body with respect to the unit scale width. Therefore, the scale for moving the circuit breaker main body to a position that satisfies various performances of the circuit breaker. Can be widened and the operator can easily perform the moving operation.
[Brief description of the drawings]
FIG. 1 is a side view for explaining an insertion operation of a drawer-type circuit breaker provided with an embodiment of a position display device according to the present invention, and is a view when a breaker body is at a disconnection position.
FIG. 2 is a diagram corresponding to FIG. 1 when the circuit breaker main body is at a position immediately before a main circuit contact and a main circuit terminal thereof come into contact with each other.
FIG. 3 is a diagram corresponding to FIG. 1 when the circuit breaker main body is at a connection position.
FIG. 4 is a view showing an embodiment of the position display device according to the present invention, wherein the circuit breaker main body is at a disconnection position.
FIG. 5 is a diagram corresponding to FIG. 4 when the circuit breaker main body is at a test position.
FIG. 6 is a diagram corresponding to FIG. 4 when the circuit breaker main body has substantially reached a connection position.
FIG. 7 is a diagram corresponding to FIG. 4 when the insertion operation of the circuit breaker main body is completed.
FIG. 8 is a diagram for explaining the relationship between the position of the breaker main body, the indicator, and the scale of the position display device according to the present invention.
[Explanation of symbols]
Reference Signs List 1 drawer frame, 3 breaker body, 5, 6 main circuit terminal, 7 auxiliary circuit terminal, 8 auxiliary circuit terminal block, 11 main circuit contact, 12 main circuit contact spring, 13 auxiliary circuit contact, 14 auxiliary circuit contact Child block, 21 pull-out operation bolt, 21b male thread, 23 pull-out operation shaft, 25 pull-out operation lever, 25a connection end, 25b, 25c notch, 25d action point, 26 connection rod, 26a female thread, 26b end face, 27 operation handle, 29 locking piece, 30 front cover, 32 display window, 33 indicator, 35 base plate, 35b guide projection, 37 operation plate, 37a, 37b long hole, 38 operation lever, 39 operation enlargement lever, 40 indicator plate , 40a notch, 41, 43, 45, 48 pin, 42 operation pin, 44 operation groove, 44a, 44b, 44c, 44d, 44e groove, 4 Expansion actuator, 46a end face 47 push lever.

Claims (1)

A drawer frame including a main circuit terminal and an auxiliary circuit terminal, and a circuit breaker body including a main circuit contact and an auxiliary circuit contact that respectively move in and out of the main circuit terminal and the auxiliary circuit terminal by moving in the drawer frame. A drawer-type circuit breaker comprising a drawer insertion mechanism for moving the circuit breaker body, the display member displaced in accordance with the position of the circuit breaker body to indicate that the circuit breaker body has reached a predetermined position. A position display device,
The display member is displaced by a sliding member that slides on each engaging edge relative to an engaging edge member formed with a plurality of engaging edges having an angle crossing a moving direction of the circuit breaker body,
When the sliding member slides over a predetermined engagement edge having a predetermined length, the display member indicates that the circuit breaker body has reached the predetermined position,
Either the engaging edge member or the sliding member is provided so that either one moves together with the circuit breaker main body in the insertion operation and the other does not move,
The predetermined engagement edge on which the sliding member slides while the circuit breaker body is moving at the predetermined position is more suitable for the sliding when the circuit breaker body moves back and forth around the predetermined position. A position indicating device for a draw-out type circuit breaker, wherein the member intersects at an angle closer to a direction perpendicular to the moving direction of the circuit breaker main body than another engaging edge on which a member slides.

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