JPH10271614A - Drawer breaker - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To facilitate connection / disconnection work of a connection terminal of an auxiliary circuit. A connection terminal of an auxiliary circuit is brought into contact with and separated from a carriage in and out of a bogie by an electric motor, and the electric motor is pulled out from a test position of a circuit breaker to an opening side.
Only the connection terminals connected to the drive circuit No. 3 are connected, and all the connection terminals of the auxiliary circuit are connected at the test position Y and the operation position X of the circuit breaker 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker for inserting and removing a circuit breaker housed in a cradle of a switchboard, and more particularly to a drawer-type circuit breaker for easily connecting and disconnecting a connection terminal of an auxiliary circuit for controlling the circuit breaker. About the vessel.

[0002]

2. Description of the Related Art FIG. 35 is a front view showing the structure of a conventional draw-out circuit breaker. Cradle 1 is fitted into a switchboard (not shown). Inside cradle 1,
The trolley 2 is housed and mounted on the bottom plate 1A of the cradle 1 via the wheels 3. A handle 2B is provided on the front of the carriage 2, and a pull-out lever 4 for electrically moving the carriage 2 to the front side or the back side of the paper is attached to both sides of the carriage 2. A connection terminal 8 of the auxiliary circuit is attached to the left side of the carriage 2, and the connection terminal 8 is also provided with a handle 5. Cradle is a word derived from English cradle,
It is a storage frame for storing a circuit breaker. When a plurality of cradle is provided, the cradle is arranged side by side up, down, left and right in the switchboard.

FIG. 36 is a side view of the apparatus shown in FIG.
The circuit breaker 12 is mounted on the cart 2. The circuit breaker 12 has two movable contacts 10 </ b> A projecting upward and downward toward the inside (right side) inside the cradle 1. A fixed contact 10B that comes into contact with each of the movable contacts 10A is attached to the cradle 1 via an insulating tube 10C. The movable contact 10 </ b> A and the fixed contact 10 </ b> B can be moved toward and away from each other, and constitute the disconnector 10. An electric motor 11 is disposed below the cradle 1 and is connected to the pullout lever 4 via a drive mechanism (not shown). The connection terminal 8 includes a movable terminal 9 fixed to the carriage 2 and a fixed terminal 7 fixed to the cradle 1. The handle 5 is attached to the movable terminal 9. The fixed terminal 7 and the movable terminal 9 can be brought into contact with and separated from each other, and FIG. 36 shows a state in which the connection terminal 8 is opened. By manually pressing the handle 5 to the position of the dashed line 5Z, the connection terminal 8 is closed.

In FIG. 36, the circuit breaker 12 is in the operating position, and the front surface 2A of the bogie 2 is at the arrow X. In the operating position of the circuit breaker 12, a main contact inside the circuit breaker 12 is connected to a main circuit in a switchboard (not shown) via the disconnecting switch 10 in a closed state. On the other hand, the test position of the circuit breaker 12 is when the front surface 2A of the bogie 2 is located at the arrow Y, and the bogie 2 is moved to the left to move the movable contact 10A and the fixed contact 10B of the disconnecting switch 10. Are separated. At this test position, an operation check of the circuit breaker 12 and the like are performed. To place the circuit breaker 12 in the test position, the drawer lever 4 is operated by the electric motor 11 in the operation position shown in FIG. 36, and the front surface 2A of the carriage 2 is moved to the position indicated by the arrow Y. As a result, the main contact of the circuit breaker 12 is in a non-voltage state. When returning the circuit breaker 12 to the operating position, the front surface 2A of the carriage 2 is moved to the position indicated by the arrow X by the reverse drive of the electric motor 11.

In FIG. 36, a bogie 2 is provided with an auxiliary circuit (not shown). This auxiliary circuit
It comprises a control circuit for the circuit breaker 12 and a drive circuit for the motor 11, and the movable terminal 9 is connected to its auxiliary circuit. Power is supplied to the fixed terminal 7 from the cradle 1 via a power supply lead (not shown). The operation of connecting and disconnecting the connection terminals 8 is performed when the circuit breaker 12 is at the test position.

[0006]

However, the conventional apparatus as described above has a problem that it is difficult to operate the connection terminals. That is, the operation of connecting and disconnecting the connection terminal requires an operation of manually inserting or pulling the movable terminal into and out of the fixed terminal, but the operation load is as large as about 20 kgf, and requires a great deal of force from the operator. Further, when a plurality of cradles are stacked, the scaffold of the worker becomes unstable, and there is a possibility that an accident due to an operation error may occur.

An object of the present invention is to facilitate connection and disconnection of connection terminals of an auxiliary circuit.

[0008]

According to the present invention, a trolley having a circuit breaker mounted on a cradle provided inside a switchboard is provided so as to be able to enter and exit the opening side of the cradle. In the back of the cradle, there is provided a disconnector consisting of a fixed contact and a movable contact which can be separated from each other, and the fixed contact is fixed to the back of the cradle and connected to the main circuit in the switchboard, and the movable contact Is fixed to the trolley side and connected to the main contact of the breaker.In the operation position of the breaker, the trolley is inserted into the back of the cradle to close the disconnector. Side, the disconnecting switch is opened, an auxiliary circuit including a control circuit of the circuit breaker and a drive circuit of the electric motor for moving the bogie is disposed on the bogie side, and the auxiliary circuits are fixed terminals that can be separated from and separated from each other. Power is supplied from the switchboard side through a connection terminal formed of a movable terminal, and the movable terminal is provided on the trolley side and the fixed terminal is fixed to the cradle side. In the position where the auxiliary circuit is connected and disconnected in conjunction with the circuit breaker and pulled out further from the test position to the opening side, only the connection terminal of the auxiliary circuit to the drive circuit is connected. It is preferable that the connection terminals are connected. Thereby, the operation of connecting and disconnecting the connection terminals is all motorized.

Further, in this configuration, the movable terminal of the connection terminal includes a plurality of conductive insertion conductors projecting toward the inner side of the cradle and insulated from each other, and of the insertion conductors, the connection conductor is connected to the drive circuit of the electric motor. The plug-in conductor protrudes deeper into the cradle than the plug-in conductor connected to the control circuit, and a plurality of conductive receiving conductors in which the fixing terminals of the connection terminals are in contact with the plug-in conductors and are insulated from each other. Only the insertion conductor connected to the drive circuit of the motor at the position further extended from the test position of the breaker to the opening side comes into contact with the receiving conductor, and all the insertion conductors at the test position and the operation position of the circuit breaker You may make it contact with a receiving conductor. As a result, only the connection terminal to the drive circuit of the motor is connected at a position further extended to the opening side of the cradle than the test position of the circuit breaker, and to both the control circuit and the drive circuit at the test position and the operation position of the circuit breaker. Are connected.

In this configuration, the movable terminal of the connection terminal includes a guide pin protruding toward the rear side of the cradle, and a guide hole engageable with the guide pin is provided by the fixed terminal of the connection terminal. The guide pin may be fitted into the guide hole while moving from the position pulled out from the test position of the container to the opening side of the cradle to the operation position via the test position. Thereby, the movement of the movable terminal is accurately guided by the guide pin in the depth direction of the cradle.

Further, in such a configuration, an insulating insert plate protruding toward the back of the cradle is formed on the terminal block of the movable terminal, and this terminal block is fixed to the trolley via a mounting portion. The insertion conductors are fitted in the insertion holes provided on the fixed terminal side in a state where the insertion conductors are respectively joined in parallel to the insertion plate, and the insertion plate, the guide pins, the terminal block, and the mounting portion are integrally molded with an insulating resin. You may make it. Thereby, the number of parts is reduced.

In this configuration, the terminal block of the fixed terminal is provided with an insertion hole for passing the insertion plate and a guide hole for passing the guide pin, and the terminal block is fixed to the cradle through the fixing portion. The fixing portion may be formed integrally with an insulating resin. Thereby, the number of parts is reduced. According to the present invention, in order to achieve the above object, a trolley having a circuit breaker mounted inside a cradle provided on a switchboard is provided so as to be able to enter and exit from the cradle on the opening side, and the cradle is provided with A disconnector consisting of a fixed contact and a movable contact that can be contacted and detached is provided. The fixed contact is fixed to the back of the cradle and connected to the main circuit in the switchboard, and the movable contact is fixed to the bogie side. With the main contact of the circuit breaker,
At the breaker operating position, the bogie is inserted into the back of the cradle to close the disconnector, and at the breaker test position, the bogie is pulled out to the cradle opening side to open the disconnector and control the breaker. The auxiliary circuit is disposed on the truck side, and the auxiliary circuit is supplied with power from the switchboard side through a connection terminal including a fixed terminal and a movable terminal which can be separated from and separated from each other, the movable terminal is provided on the truck side, and the fixed terminal is disposed on the cradle side. The drawer-type circuit breaker, which is operated by manually inserting and removing the movable terminal from the opening side of the cradle, is provided at the drawer side of the cart. An operating shaft is interposed between the handle and the movable terminal, and the operating shaft is rotatably mounted on the movable terminal in conjunction with the manual handle, and the depth of the operating shaft Is provided on the outer periphery of the operating shaft with a cam groove into which the tip of the projecting shaft fits. The cam groove is parallel to the axial direction of the operating shaft. It may be made up of two parallel grooves and an inclined groove connecting the two parallel grooves obliquely on the depth side. When connecting the connection terminal, when the circuit breaker is in the test position, if the manual handle is pushed in to the depth side, the protrusion shaft is guided by one of the parallel grooves, and the movable terminal moves to the back.
If the manual handle is turned when the projection shaft comes to the position of the inclined groove, the movable terminal moves further back by guiding the projection shaft to the inclined groove. If the contact between the movable terminal and the fixed terminal is fitted when the projection shaft moves along the inclined groove, the rotation of the handwheel can be performed even if the operation load for inserting the movable terminal into the fixed terminal is slightly large. It only needs to. If the connection terminal is connected when the projection shaft comes to the position of the other parallel groove via the inclined groove, the circuit breaker can be moved to the operation position. The other parallel groove is for moving the circuit breaker with the projection shaft fitted when moving to the operating position. When the circuit breaker is returned to the test position, the connection terminals are also opened at the same time, but in order to prepare for the next connection of the connection terminals, the protrusion shaft is tilted by performing the reverse operation of the manual handle as described above. Back to one of the parallel grooves.

In such a configuration, a return groove connecting the two parallel grooves on the opening side of the cradle may be formed. Thereby, when the circuit breaker is moved from the test position to the operation position, if the projection axis is in the other parallel groove, it can be easily transferred to one projection axis via the return groove. In such a configuration, the manual handle and the operation shaft may be connected via a hinge mechanism. Thus, the fulcrum of the manual handle and the operation shaft can be displaced, and the manual handle can be provided at an arbitrary position on the side where the cart is pulled out.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments. FIG. 1 is a front view showing a configuration of a drawer-type circuit breaker according to an embodiment of the present invention. The cradle 21 is fitted inside a switchboard (not shown). A trolley 22 is housed inside the cradle 1, and wheels 23
Is placed on the bottom plate 21A of the cradle 21 via the. A handle 22B is provided on the front of the carriage 22, and drawer levers 24 for electrically moving the carriage 22 to the front side or the back side of the paper are attached to both sides of the carriage 22. A connection terminal 28 of an auxiliary circuit is attached to the left rear of the carriage 22.

FIG. 2 is a plan view of the apparatus of FIG. The three-phase circuit breaker 14 is mounted on the carriage 22. Circuit breaker 14
, A three-phase three-piece movable contact 10 </ b> A protrudes toward the inner back side (right side) of the cradle 21. The fixed contact 10B that comes into contact with each of the movable contacts 10A is
It is attached to the cradle 21 via the insulating tube 10C. The movable contact 10 </ b> A and the fixed contact 10 </ b> B can be moved toward and away from each other, and constitute the disconnector 10.

FIG. 3 is a side view of the apparatus of FIG. The disconnecting switch 10 also includes two movable contacts 10A on the upper and lower sides, and the fixed contacts 10B are brought into contact with each of the movable contacts 10A. An electric motor 13 is arranged below the cradle 21 and is connected to a pull-out lever 2 via a mechanism (not shown).
4. In FIG. 3, the circuit breaker 14 is in the operating position, and the front surface 22 </ b> A of the bogie 22 is at an arrow X. In the operating position of the circuit breaker 14, a main contact inside the circuit breaker 14 is connected to a main circuit (not shown) via the disconnector 10 in a closed state. The test position of the circuit breaker 14 is a position where the carriage 22 moves to the left and the main contact inside the circuit breaker 14 is disconnected from the main circuit. At this test position, an operation check of the circuit breaker 14 and the like are performed. In order to place the circuit breaker 14 in the test position, the drawer lever 24 is operated by the electric motor 13 in the operation position in FIG. 3 to move the front surface 22A of the carriage 22 to the position indicated by the arrow Y. As a result, the movable contact 10A and the fixed contact 10B of the disconnector 10 are separated from each other, and the main contact of the circuit breaker 14 is in a no-voltage state. The carriage 22 has a front surface 22.
The motor 13 is moved by the electric motor 13 to a position where A has moved further from the test position of the circuit breaker 14 toward the opening side of the cradle 21 (to the left in FIG. 3), that is, the position indicated by the arrow Z. This arrow Z
Corresponds to the disconnection position of the control circuit described later.
When the circuit breaker 14 is returned to the operating position, the front surface 22A of the carriage 22 is moved from the position of arrow Z to the position of arrow X via the position of arrow Y by reverse driving of the electric motor 13.

Returning to FIG. 2, the connection terminal 28 of the auxiliary circuit is
It is attached to the left side of the trolley 22 and the inner wall of the cradle 21. Although the configuration of the connection terminal 28 will be described later in detail, the connection terminal 28 includes a movable terminal and a fixed terminal which can be separated from and separated from each other. Although not shown, the auxiliary circuit includes a control circuit for the circuit breaker 14 and a drive circuit for the electric motor 13, and is disposed on the carriage 22. Power is supplied to this auxiliary circuit by cradle 21
The connection is made from the side via the connection terminal 28. Connection terminal 28
Moves the movable terminal and the fixed terminal together with the position of the carriage 22 moving in the cradle 21.

That is, as shown in FIG. 3, when the front surface 22A of the carriage 22 is at the position indicated by the arrow Z in FIG. 3, only the connection terminals connected to the drive circuit of the electric motor 13 among the auxiliary circuits are connected. As a result, the electric motor 13 can be driven, so that the carriage 22 can be moved left and right by electric power. When the front surface 22A of the carriage 22 is in the position of the arrow Y (the test position of the circuit breaker) and the position of the arrow X (the operation position of the circuit breaker), the connection terminal 28
The connection terminals connected to the control circuit 4 and the drive circuit of the electric motor 13 are connected. As a result, the operation of connecting and disconnecting the connection terminal 28 is entirely motorized, so that the operation force of the operator becomes unnecessary and the work becomes safe.

Next, the configuration of the connection terminal 28 will be described. FIG.
4A and 4B are diagrams showing a configuration of a movable terminal among the connection terminals 28 of the apparatus of FIG. 1, wherein FIG. 4A is a rear view and FIG.
FIG. 3A is an enlarged rear view of a portion A of FIG. That is, FIG.
FIG. 4 is a view of the trolley 22 of FIG. 3 as viewed from the right side. In FIG. 4A, a mounting bracket 37 for the movable terminal 28A is mounted on the rear side of the trolley via mounting bolts 36. An insulating terminal block 38 is attached to the mounting bracket 37, and a plurality of terminal screws 32 for connecting to an auxiliary circuit in the carriage are screwed to both sides of the terminal block 38. In addition, the movable terminal 28 is vertically provided on the mounting bracket 37.
A guide pin 31 serving as a guide for inserting A into the fixed terminal is provided. Further, in FIG. 4B, an insulating insertion plate 34 protrudes from the center of the terminal block 38 on the opening side in the drawing. A plurality of insertion conductors 33 are joined to both left and right surfaces of the insertion plate 34. The insertion conductor 33 is made of a copper band, and is a portion that comes into contact with a receiving conductor of a fixed terminal described later. Reference numeral 35 denotes a portion where the insertion conductor 33 is bent at right angles to both sides at the terminal block 38, and each is fixed by the terminal screw 32.

FIG. 5 is a plan view showing the structure of the movable terminal 28A shown in FIG. The guide pin 31 is welded to the mounting bracket 37 and is arranged in parallel with the projecting direction of the insertion plate 34. Further, the right end of the guide pin 31 is sharp, so that it can be easily inserted into a guide hole of a fixed terminal described later. The terminal block 38 is integral with the insertion plate 34 and is fixed to the mounting bracket 37 via screws 75.

FIG. 6A shows the movable terminal 28 shown in FIG.
FIG. 6B is a side view showing a configuration of A, and FIG. 6B is an enlarged side view of a main part of FIG. 6A. That is, FIG. 6A is also a view taken in the direction of the arrow B in FIG. Insertion plate 34 is concave 3
4A and a convex portion 34B, and the insertion conductor 33 is joined to the concave portion 34A. Of the insertion conductor 33,
The uppermost and second insertion conductors 33A from the top protrude longer to the right than the other insertion conductors 33. The insertion conductor 33A is a terminal connected to a drive circuit of the electric motor. As will be described later, when the insertion plate 34 is inserted into the insertion hole of the fixed terminal, the insertion conductor 33A is first brought into contact with the receiving conductor to enable the electric operation of the bogie. FIG. 6B is an enlarged view of part C, part D and part E of FIG. 6A. As described with reference to FIG. 4B, the portions 35 of the insertion conductor 33 bent at a right angle are fixed to the terminal blocks 38 by the terminal screws 32 via the washers 32A.

FIG. 7 shows connection terminals 28 of the apparatus shown in FIG.
It is a figure which shows the structure of a fixed terminal, (A) is a front view, (B) is an enlarged rear view of the F section of (A) of FIG. 7, and (C) is a top view, respectively. In FIG. 7A, a mounting fitting 49 for the fixed terminal 28B is mounted on the cradle side via a mounting bolt 46. This mounting bracket 49
An insulating terminal block 48 is attached to the terminal block. Further, guide holes 41 for penetrating the guide pins of the movable terminals are provided on the upper and lower sides of the mounting bracket 37. At the center of the terminal block 48, a fitting hole 50 through which the insertion conductor of the movable terminal penetrates is provided. In FIG. 7 (B), the receiving conductors 43 face each other from both sides of the terminal block 48 of the movable terminal, and the receiving conductor 43 comes into contact with the insertion conductor when the insertion plate of the movable terminal passes through the insertion hole 50. It has become. The receiving conductors 43 are fixed on both sides of the terminal block 48 with terminal screws 42, respectively. In FIG. 7C, the receiving conductor 43 is made of a copper band, and portions facing each other are formed in an arc shape. The insertion conductor slides in the arc-shaped portion of the receiving conductor 43. Further, the mounting portion 47 is sandwiched between a mounting bracket 49 bent in a U-shape and a supporting bracket 51. The mounting portion 47 is fixed to the cradle 21 by a screw 47A. This mounting bracket 49 is initially loosely fixed with a screw 47A, and a guide pin is passed through the guide hole 41.
After confirming that the insertion conductor of the movable terminal comes and goes well with the receiving conductor 43 of the fixed terminal, the screw 47A is tightened.

FIG. 8A is a side view of FIG. 7A, and FIG. 8B is a rear view of FIG. 7A. FIG.
In (A), the guide hole 41 is formed by the inner wall of the cylindrical portion. By making the guide hole 41 a cylindrical portion that is long in the axial direction, the guide pin can be accurately guided in the axial direction of the cylindrical portion. FIG. 8B is a view of FIG. 8A viewed from the right side, and an insertion hole 50 is also formed in the accessory metal fitting 51 so that the insertion plate for the movable terminal penetrates. Further, the attachment metal fitting 51 is a mounting metal fitting 49 shown in FIG.
Are fixed by bolts 46 penetrating through.

FIG. 9 shows the connection terminal 28 with the device of FIG. 3 pulled out further to the left from the test position of the circuit breaker.
(A) is a plan view, FIG.
(B) is a side view. That is, in FIG. 9, although the front surface 22A of the bogie 22 is located at the position of the arrow Z in FIG. 3 and the connection terminal connected to the control circuit of the circuit breaker is disconnected,
The connection terminals connected to the drive circuit of the motor are connected. The tip of the guide pin 31 of the movable terminal 28A is inserted into the guide hole 41, and the tip of the insertion plate 34 is also inserted into the insertion hole of the fixed terminal 28B. Among the plug-in conductors 33, the two plug-in conductors 33A from the top are longer than the plug-in conductors 33 that are smaller than the plug-in conductors 33A. Therefore, only the plug-in conductor 33A connected to the drive circuit of the motor is in contact with the receiving conductor 42. In addition, power can be supplied to the electric motor via the insertion conductor 33A.
Can be moved to the right from the state described above.

FIGS. 10A and 10B are diagrams showing the configuration of the connection terminal 28 when the device shown in FIG. 3 is at the test position of the circuit breaker. FIG. 10A is a plan view and FIG. 10B is a side view. That is, in FIG. 10, the front surface 22A of the bogie 22 in FIG. 3 is located at the position indicated by the arrow Y, and the connection terminals connected to the control circuit of the circuit breaker and the drive circuit of the electric motor are both connected. Since the movable terminal 28A moves rightward with respect to the fixed terminal 28B in conjunction with the electric motor 13, all the insertion conductors 33 are in contact with the receiving conductors. Therefore, in this state, the operation check of the circuit breaker can be performed.

FIGS. 11A and 11B are diagrams showing the configuration of the connection terminal 28 when the device shown in FIG. 3 is in the operating position of the circuit breaker. FIG. 11A is a plan view and FIG. 11B is a side view. That is, in FIG. 11, the front surface 22A of the bogie 22 in FIG. 3 is located at the position of the arrow X, and in this case also, the connection terminals connected to the control circuit of the circuit breaker and the drive circuit of the electric motor are both connected.

FIG. 12 is a rear view showing the structure of the connection terminals of the draw-out circuit breaker according to another embodiment of the present invention. FIG. 12 shows the configuration of the movable terminal 58A. Movable terminal 5
A terminal block 59 is provided on the 8A insertion plate 54, and the terminal block 59 is fixed to the carriage via a mounting portion 57 with screws 56. The mounting portion 57 is provided with a guide pin 51 protruding toward the opening side of the paper surface.
Is used as a guide for inserting into the fixed terminal. Further, a plurality of terminal screws 32 for connecting to an auxiliary circuit in the carriage are screwed to both sides of the terminal block 59.

FIG. 13 is a plan view of FIG. The insertion portions 33 and 33A are joined to the insertion plate 54, and the insertion plate 54, the terminal block 59, and the attachment portion 57 are integrally formed of, for example, an insulating resin. Thereby, the number of parts of the movable terminal 58A is reduced, and the manufacturing cost is reduced. FIG. 14 is a side view of FIG. The configuration of the insertion portions 33 and 33A joined to the insertion plate 54 is the same as that in FIG. Compared with the movable terminal 28A in FIG. 6, the number of parts of the movable terminal 58A is reduced, and the work of welding the guide pins is not required. Further, the movable terminal 5
Since 8A is integrally molded, the parallelism between the guide pin 51 and the insertion plate 54 and the perpendicularity between the guide pin 51 and the mounting portion 57 are accurately formed, and the fitting property between the movable terminal 58A and the fixed terminal is ensured. become.

FIGS. 15A and 15B are diagrams showing the configuration of the connection terminals of the drawer-type circuit breaker according to still another embodiment of the present invention, wherein FIG. 15A is a rear view and FIG. 15B is a plan view. FIG.
(A) shows the configuration of the fixed terminal 58B, which can be fitted to the movable terminal 58A of FIG. The insulating fixing part 69 is
It is mounted on the cradle side via mounting bolts 66. An insulating terminal block 68 is attached to the fixing portion 69, and a plurality of terminal screws 42 for connecting to an auxiliary circuit in the carriage are screwed to both sides of the terminal block 68. In addition, guide holes 61 for penetrating the guide pins 51 (FIG. 12) of the movable terminal 58A are provided above and below the mounting portion 69. A fitting hole 60 is also provided at the center of the terminal block 68 to allow the insertion conductor 54 (FIG. 12) of the movable terminal 58A to pass therethrough. In addition, the terminal block 6 of the movable terminal
8, the receiving conductors 43 face each other, and when the insertion plate 34 of the movable terminal 58 </ b> A passes through the insertion hole 60, the receiving conductor 43 comes into contact with the insertion conductor 33. The receiving conductors 43 are fixed on both sides of the terminal block 68 by the terminal screws 42, respectively. In FIG. 15B, when the insertion plate 34 passes through the insertion hole 60, the insertion plate 33 slides with the insertion conductor 33. Further, the mounting portion 47 is sandwiched between the mounting portion 69 and the attachment 62.

FIG. 16A is a side view of FIG. 15A, and FIG. 16B is a front view of FIG.
In FIG. 16A, the left opening of the guide hole 61 is opened in an arc shape so that the guide pin 51 can be smoothly inserted. FIG. 15 (B) is a view of FIG. 16 (A) viewed from the right, but a guide hole 61 and an insertion hole 60 are also provided in the accessory metal fitting 62, and these holes 60, 61 are common. It has become.

Returning to FIG. 15A, the other configuration of the fixed terminal 58B is the same as the fixed terminal 28B of FIG. 7A. In addition, the fixed terminal 58 </ b> B includes a terminal block 68 and a fixed portion 69.
Are formed integrally with, for example, an insulating resin. Thereby, the number of components of the fixed terminal 58B is reduced, and the manufacturing cost is reduced. FIG. 17 is a front view showing a configuration of a drawer-type circuit breaker according to still another embodiment of the present invention. Cradle 1 is fitted into a switchboard (not shown). A trolley 2 is stored inside the cradle 1, and a bottom plate 1 of the cradle 1 is
A is placed on A. A handle 2B is provided on the front of the cart 2. A connection terminal of an auxiliary circuit described later is mounted on the left side of the cart 2, and a manual handle 100 for operating the connection terminal is mounted on the front side of the switchboard. The manual handle 100 switches between a state indicated by a dashed line (open state of the connection terminal) and a state indicated by a solid line (connection state of the connection terminal).

FIG. 18 is a plan view of a main part of FIG. The circuit breaker 12 mounted on the cart 2 is provided with a disconnector 10 similar to that of FIG. 36 on the depth side (right side). The connection terminal 8 includes a fixed terminal 7 fixed to the cradle 1 side and a movable terminal 9 provided on the carriage 2 side, and the fixed terminal 7 and the movable terminal 9 can be connected to and separated from each other. The support 103 is fixed to the trolley 2 side.
2 is attached to freely move in the left-right direction. Support shaft 1
02 at the left end of the manual handle 100 via a support 112.
The movable contact 9 is fixed to the right end of the support shaft 102 via a support 113. In FIG. 18, connection terminal 8
The fixed terminal 7 and the movable terminal 9 are connected. The connection terminal 8 is opened by manually operating the manual handle 100 in the state of the dashed line by the guide of the guide portion 120 described later.

FIG. 19 is a view taken in the direction of the arrow AA in FIG. FIG. 19 is a diagram illustrating a state where the disconnector 10 is opened. That is, the test state of the circuit breaker 12 and the front 2
A is at the position of arrow Y. By moving the cart 2 to the right, the disconnector 10 is closed and the vehicle is in the operating state. As described above, the connection terminal 8 is connected before the disconnector 10 is closed. The upper and lower two support shafts 102 pass through the support 103 and are fixed to the support 112.
On the other hand, the right end of the support shaft 102 is fixed to another support 113. The movable contact 9 is fixed to the support 113. The operating shaft 10 is parallel to the middle of the upper and lower
1 and a manual handle 100 at the left end of the operation shaft 101.
Is fixed, and the right end of the operation shaft 101 is supported by a support 11.
3 to be freely rotatable. Also, the operation axis 101
Penetrates freely through the support 112 and the support 103. Therefore, when the connection terminal 8 is opened, the manual handle 100 and the support 112 come to the position indicated by the dashed line.

FIGS. 20A and 20B show the configuration of the guide portion 120 of FIG. 19, wherein FIG. 20A is a side view, and FIG. 20B is a view taken along the line BB of FIG. The guide portion 120 has a substantially L-shape, and has an inner surface in an arc shape. In FIG. 20A, two parallel grooves 105A and 105B are formed on the inner surface of the guide portion 120, and the parallel grooves 105A and 105B are formed.
The right end of 105B is connected by the inclined groove 106. The inclination angle α of the inclined groove 106 is about 60 degrees. The operation shaft 101 runs parallel to the inner surface of the guide unit 120. As shown in FIG. 20B, the operation shaft 101 is
A projection shaft 107 is provided to project in a direction perpendicular to the axial direction. The tip of this projection shaft 107 is connected to the parallel grooves 105A, 10A.
5B and the inclined groove 106.
The projection shaft 107 is guided along these grooves. Thereby, the operation shaft 101 moves in the axial direction or the circumferential direction.

FIG. 21 is a perspective view showing the structure of the guide section 120 of FIG. The hole 109 is a mounting hole on the trolley side. When the connection terminal of the auxiliary circuit is in the disconnected state, the projection shaft 107 of the operation shaft 101 is at the CC end of the parallel groove 105A, and when the movable terminal is pressed toward the fixed terminal by the manual handle, the projection shaft 107 becomes parallel groove. Arrow A inside 105A
Move in one direction. When the manual handle is turned when the projection shaft 107 reaches the DD end, the projection shaft 107
06 in the direction of arrow A2. As a result, the operation shaft 101 moves in the axial direction while rotating. The movable contact and the fixed contact of the connection terminal are set to be directly joined when the projection shaft 107 moves in the inclined groove 106. If the rotation of the manual handle is stopped when the projection shaft 107 reaches the EE end, the connection terminal is completely connected. In this state, the bogie is moved to close the disconnector, but since the fixed contact of the connection terminal is fixed to the cradle side, the projection shaft 107 does not move. Therefore, the projection shaft 107 moves in the direction of the arrow A3 in the parallel groove 105B and comes to the FF end. That is, the guide portion 120 is
Guide 1 As described above, when a movable contact and a fixed contact of a connection terminal are directly joined, a very large force is required. be able to. Next, the operation state of the connection terminal by the guide unit 120 will be described in more detail with reference to the drawings.

FIG. 22 is a view showing a case where the connection terminal 8 of FIG. 19 is in an open state. FIG.
(B) is a view on arrow GG of (A) of FIG. 22. However,
In FIG. 22, the illustration of the cradle and the cart is omitted. The movable contact 9 faces away from the fixed contact 7 fixed to the cradle side. The handle of the manual handle 100 is kept horizontal, and the projection shaft 107 of the operation shaft 101 stands vertically and is located on the left side of the guide portion 120. As described above, the projection shaft 107 is provided in the parallel groove 10 of the guide portion 120.
5A (FIG. 21). Also, the inclined groove 106
Is located on the right side of the guide section 120.

FIG. 23 is a view showing a state immediately before the connection terminal 8 of FIG. 22 is connected. FIG.
(B) is a view on arrow HH of (A) of FIG. 23. That is, FIG. 23 shows the result of pressing the manual handle 100 rightward from the state of FIG. 22 until the movable contact 9 comes into contact with the fixed contact 7. The projection shaft 107 of the operation shaft 101 is guided by the parallel groove 105 </ b> A (FIG. 21) of the guide portion 120, moves rightward in the vertical state, and comes to the upper part of the inclined groove 106.

FIGS. 24A and 24B are views showing a state in which the connection terminals 8 of FIG. 23 are connected. FIG. 24A is a side view of a main part, and FIG. 24B is a view taken in the direction of the arrow II in FIG. . That is, FIG.
Indicates the state in FIG. 23 (the state in which the manual handle 100 is indicated by a dotted line).
This is the result of turning the manual handle 100 in the direction of the arrow NN until the movable contact 9 is inserted into the fixed contact 7 from FIG. The projection shaft 107 of the operation shaft 101 is guided by the inclined groove 106 of the guide portion 120 and moves from the vertical state to the horizontal state while moving to the right side in FIG.
Come to the right end of B. This configuration is a state in which the connection terminals 8 are completely connected. Since only the manual handle 100 is rotated, a large operation force is not required for inserting the movable terminal, so that the operation of the connection terminal 8 is not only easy, but also the operation is safe.

FIG. 25 is a view showing a state in which the disconnector is closed with the connection terminal 8 of FIG. 24 connected.
(A) is a side view of a main part, and (B) is a view on arrow JJ of (A) of FIG. 25. That is, the manual handle 100 is
25A, the protrusion shaft 107 of the operation shaft 101 is guided by the parallel groove 105B of the guide portion 120 and moves to the left in FIG.
Come to the left of B.

When the disconnecting switch is opened, the reverse of the above procedure, that is, FIGS. 25 to 24, FIG. 23, and FIG.
2, the manual handle 100 is operated. FIG.
26A and 26B show a configuration of a guide portion 121 of a drawer-type circuit breaker according to still another embodiment of the present invention, wherein FIG. 26A is a side view, and FIG. FIG.
5A, the left side of the parallel grooves 105A and 105B is connected by a return groove 108. Projection shaft 107 is parallel groove 105B
, The protrusion shaft 107 can be immediately returned to the parallel groove 105A side via the return groove 108.

FIG. 27 is a perspective view showing the structure of the guide portion 121 of FIG. The projection shaft 107 at the FF end of the parallel groove 105B can be moved in the direction of arrow A4 via the return groove 108. Other configurations in FIGS. 26 and 27 are the same as those in FIGS. 20 and 22, respectively. Thereby, when the projecting shaft 107 is in the parallel groove 105B when the circuit breaker is moved from the test position to the operating position, the projecting shaft 107 can be easily moved to the parallel groove 105A via the return groove 108.
Can be transferred to 20 and 22, the operation has to be performed through the inclined groove 106, but the operation can be immediately performed by the return groove 108.

FIG. 28 is a front view showing the structure of a drawer-type circuit breaker according to still another embodiment of the present invention. FIG. 29 is a plan view of a main part of the device in FIG. 28, in which the connection terminals 8 are open. 28 and 29
17 differs from FIGS. 17 and 18 only in that the hinge mechanism 110 is attached to the manual handle 100.

FIG. 30 is a view taken in the direction of the arrow LL in FIG. However, illustration of the cradle is omitted. The manual handle 100 and the operation shaft 101 are connected via a hinge mechanism 110. With the interposition of the hinge mechanism 110, the fulcrum of the manual handle 100 and the operation shaft 101 can be shifted. Pressing and rotating the manual handle 100
The signal is transmitted to the operation shaft 101 by the hinge mechanism 110, and the connection terminal 8 can be brought into and out of contact.

FIG. 31 shows the manual handle 1 of the apparatus shown in FIG.
00 is a front view showing a state where the connection terminal is connected by being turned from the position of the dotted line in the direction of arrow PP. FIG. 32
FIG. 32 is a plan view of a main part of FIG. 31. FIG. 33 is a view as viewed from the direction indicated by the arrow MM in FIG. The connection terminal 8 is connected in exactly the same way as in the configuration of FIG. FIG. 34 is a partially broken perspective view showing details of the hinge mechanism 110 of FIG.
A part of the support 103 is crushed so that the guide portion 120 and the operation shaft 101 can be seen. Handwheel 1
00, the front side of the pin 110A is fixed.
One end of the lever 110B is fixed to the other side of the lever 110B. The other end of the lever 110B is rotatably connected to the lower end of the lever 110D via a pin 110C. The upper end of lever 110D is pin 1 on the upper end of lever 110F.
It is rotatably connected via 10E. Lever 11
The lower end of OF is fixed to the operation shaft 101. 110A
To 110F are hinge mechanisms 110, and FIG.
This is the case when the connection terminal is in the connection state. Handwheel 1
When 00 comes to the position indicated by the chain line, the lever 110B rotates counterclockwise. As the lever 110D moves down, the lever 110F rotates clockwise. Thereby, the operation shaft 101 also rotates clockwise. When the manual handle 100 is moved in and out, the operation shaft 101 moves in the axial direction together with the hinge mechanism 110.

Returning to FIG. 28, if the hinge mechanism 110 is interposed, the manual handle 110 can be arranged at a position where the switchboard can be easily operated, and the operation of connecting and disconnecting the connection terminals can be easily performed.

[0046]

As described above, according to the present invention, the connection terminals are connected and disconnected in conjunction with the movement of the bogie by the electric motor, and the auxiliary circuit is driven at a position further extended from the test position of the circuit breaker to the opening side of the cradle. Only the connection terminals to the circuit are connected, and in the test position and the operating position of the circuit breaker, all connection terminals to the auxiliary circuit are connected. As a result, all the operations of connecting and disconnecting the connection terminals are electrically operated, so that the operation force of the operator becomes unnecessary and the work becomes safe. In addition, since the connection and disconnection of the connection terminals are linked to the truck, a new motor is not required, and the device can be manufactured at low cost.

In this configuration, the movable terminal of the connection terminal includes a guide pin protruding toward the rear side of the cradle, the guide hole engageable with the guide pin is provided by the fixed terminal of the connection terminal, and the bogie is shut off. The guide pin fits into the guide hole while moving from the position further extended from the test position to the opening side of the cradle through the test position to the operation position. Thereby, the movable terminal is accurately guided in the depth direction of the cradle, and the movable terminal smoothly comes into contact with and separates from the fixed terminal.

Further, in such a configuration, an insulating insert plate protruding toward the back side of the cradle is formed on the terminal block of the movable terminal, and this terminal block is fixed to the carriage via the mounting portion, and The insertion conductors are fitted in the insertion holes provided on the fixed terminal side in a state where the insertion conductors are respectively joined in parallel to the insertion plate, and the insertion plate, the guide pins, the terminal block, and the mounting portion are integrally molded with an insulating resin. You. Thereby,
The number of parts is reduced, and the manufacturing cost can be reduced.

In this configuration, an insertion hole for passing the insertion plate and a guide hole for passing the guide pin are provided in the terminal block of the fixed terminal, and the terminal block is fixed to the cradle through the fixing portion. The fixing part is integrally molded with an insulating resin. Thereby, the number of parts can be reduced, and the manufacturing cost can be reduced. Further, as described above, in the present invention, a manual handle for taking in and out the movable terminal is provided on the drawer side of the cart, and an operation shaft is interposed between the manual handle and the movable terminal, and the operation shaft is interlocked with the manual handle. The operating shaft is rotatably mounted on the movable shaft, and a projection shaft is provided on the depth side of the operation shaft so as to face outward in the radial direction. A guide portion having a cam groove into which the tip of the projection shaft fits is provided on the outer periphery of the operation shaft. And the cam groove is composed of two parallel grooves parallel to the axial direction of the operation shaft, and an inclined groove connecting the two parallel grooves obliquely on the depth side. When the movable terminal is inserted into the fixed terminal, only the turning of the manual handle is required, so that the connection and disconnection work of the connection terminal of the auxiliary circuit becomes easy, and the operation becomes safe.

In such a configuration, a return groove is formed to connect the two parallel grooves on the opening side of the cradle. Thus, when the circuit breaker is moved from the test position to the operation position, if the projection axis is in the other parallel groove, it can be easily transferred to one projection axis via the return groove, and the connection terminal of the auxiliary circuit connection terminal Insertion work becomes very fast. In such a configuration, the manual handle and the operation shaft may be connected via a hinge mechanism. Thus, the fulcrum of the manual handle and the operation axis can be shifted, the manual handle can be provided at an arbitrary position on the front side of the switchboard, and the manual handle can be attached to a place where it can be easily operated from the outside.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of a drawer-type circuit breaker according to an embodiment of the present invention.

FIG. 2 is a plan view of the apparatus of FIG. 1;

FIG. 3 is a side view of the apparatus of FIG. 1;

4A and 4B are diagrams showing a configuration of a movable terminal among connection terminals of the device of FIG. 1, wherein FIG. 4A is a rear view and FIG.
(A) Enlarged rear view of part A of FIG.

FIG. 5 is a plan view showing a configuration of a movable terminal in FIG. 4;

6A is a side view showing a configuration of the movable terminal of FIG. 4A, and FIG. 6B is an enlarged side view of a main part of FIG. 6A.

7A and 7B are diagrams showing the configuration of fixed terminals among the connection terminals of the device of FIG. 1, wherein FIG. 7A is a front view and FIG.
(A) is an enlarged rear view of a portion F, and (C) is a plan view.

8A is a side view of FIG. 7A, and FIG.
(A) Rear view

9A and 9B are diagrams showing a configuration of the connection terminal 28 in a state where the device of FIG. 3 is pulled out further to the left side from the test position of the circuit breaker, where FIG. 9A is a plan view and FIG.

10A and 10B are diagrams showing a configuration of a connection terminal when the device of FIG. 3 is at a test position of a circuit breaker, where (A) is a plan view and (B) is a side view.

11A and 11B are diagrams showing a configuration of a connection terminal when the device of FIG. 3 is in an operation position of a circuit breaker, where (A) is a plan view and (B) is a side view.

FIG. 12 is a rear view showing the configuration of the connection terminals of the draw-out circuit breaker according to another embodiment of the present invention.

FIG. 13 is a plan view of FIG. 11;

FIG. 14 is a side view of FIG. 11;

15A and 15B are diagrams showing a configuration of a connection terminal of a drawer-type circuit breaker according to still another embodiment of the present invention, wherein FIG. 15A is a rear view and FIG. 15B is a plan view.

16A is a side view of FIG. 15A, and FIG. 16B is a front view of FIG.

FIG. 17 is a front view showing a configuration of a drawer-type circuit breaker according to still another embodiment of the present invention.

18 is a plan view of a main part of FIG. 17;

FIG. 19 is a view taken in the direction of arrows AA in FIG. 17;

20A and 20B show the configuration of the guide unit in FIG. 19, wherein FIG. 20A is a side view, and FIG. 20B is a view taken in the direction of arrow BB in FIG.

FIG. 21 is a perspective view showing a configuration of a guide unit in FIG. 20;

22A and 22B are diagrams showing a case where the connection terminal of FIG. 19 is in an open state, wherein FIG. 22A is a side view of a main part, and FIG.

23A and 23B are diagrams showing a state immediately before connection terminals of FIG. 22 are connected, wherein FIG. 23A is a side view of a main part, and FIG.

24A and 24B are diagrams showing a state where the connection terminals of FIG. 23 are connected, wherein FIG. 24A is a side view of a main part, and FIG. 24B is a view of FIG.
In the view of the arrow II

25A and 25B are diagrams showing a state in which the disconnecting switch is closed with the connection terminals of FIG. 24 connected, wherein FIG. 25A is a side view of a main part, and FIG. 25B is a view of JJ of FIG. Arrow view

26A and 26B show the configuration of a guide portion of a drawer-type circuit breaker according to still another embodiment of the present invention, wherein FIG. 26A is a side view, and FIG.

FIG. 27 is a perspective view showing the configuration of the guide unit of FIG. 26;

FIG. 28 is a front view showing the configuration of a drawer-type circuit breaker according to still another embodiment of the present invention.

FIG. 29 is a plan view of a main part of FIG. 28;

30 is a view as viewed from the direction indicated by the arrow LL in FIG. 28.

FIG. 31 is a front view showing a state where the manual handle of the device shown in FIG. 28 is rotated from the position shown by the dotted line to connect the connection terminal;

FIG. 32 is a plan view of a main part of FIG. 31;

FIG. 33 is a view taken in the direction of the arrows MM in FIG. 31;

FIG. 34 is a partially broken perspective view showing details of the hinge mechanism of FIG. 28;

FIG. 35 is a front view showing the configuration of a conventional drawer-type circuit breaker.

FIG. 36 is a side view of the device of FIG. 35.

[Explanation of symbols]

2, 21: cradle, 2, 22: trolley, 13: electric motor, 10: disconnector, 8, 28: connection terminal, 9, 28A,
58A: movable terminal, 7, 28B, 58B: fixed terminal, 3
3, 33A: insertion conductor, 43: receiving conductor, 31, 5
1: guide pin, 34, 54: insertion plate, 41, 61: guide hole, 50, 50: insertion hole, 38, 48, 59, 6
8: terminal block, 57, 69: mounting part, 12: circuit breaker, 1
00: manual handle, 101: operation shaft, 120: guide portion, 105A, 105B: parallel groove, 106: inclined groove, 1
08: return groove, 110: hinge mechanism, 107: projection axis

Claims (8)

[Claims] A trolley having a circuit breaker mounted on a cradle provided inside a switchboard is provided so as to be able to be inserted into and removed from an opening side of the cradle, and a fixed contact and a movable contact which can be moved toward and away from each other are provided at the back of the cradle. The fixed contact is fixed to the back of the cradle and connected to the main circuit in the switchboard.The movable contact is fixed to the bogie and connected to the main contact of the circuit breaker. In the operating position of the circuit breaker, the bogie is inserted into the back of the cradle to close the disconnector, and in the test position of the circuit breaker, the bogie is pulled out to the opening side of the cradle to open the disconnector, and the control circuit of the circuit breaker and the bogie An auxiliary circuit including a drive circuit of a motor for moving the motor is disposed on the bogie side, and the auxiliary circuit is supplied with power from a switchboard side through a connection terminal including a fixed terminal and a movable terminal which can be separated from and separated from each other, and is movable. In a drawer-type circuit breaker in which a child is provided on the trolley side and a fixed terminal is fixed to the cradle side, the connection terminal comes in contact with and separates from the movement of the trolley by the electric motor, and further opens from the test position of the breaker. A drawer-type circuit breaker characterized in that only the connection terminals to the drive circuit of the auxiliary circuit are connected in the pulled-out position, and all the connection terminals to the auxiliary circuit are connected in the test position and the operation position of the circuit breaker. vessel. 2. The connection terminal according to claim 1, wherein the movable terminal of the connection terminal includes a plurality of conductive insertion conductors projecting toward the back side of the cradle and insulated from each other. The plug-in conductor connected to the drive circuit protrudes deeper into the cradle than the plug-in conductor connected to the control circuit, and the fixed terminal of the connection terminal contacts each of the plug-in conductors and is insulated from each other. Equipped with a conductive receiving conductor,
Only the insertion conductors connected to the drive circuit of the motor at the position further extended from the test position of the breaker to the opening side come into contact with the receiving conductor, and at the test position and the operation position of the circuit breaker, all insertion conductors A drawer-type circuit breaker characterized by being in contact. 3. The connection terminal according to claim 2, wherein the movable terminal of the connection terminal includes a guide pin protruding toward the back side of the cradle, and a guide hole engageable with the guide pin is provided with a fixed terminal of the connection terminal. The drawer type, wherein the guide pin is fitted into the guide hole while the bogie moves from the position where the bogie is further pulled out from the test position to the opening side of the cradle through the test position to the operating position. Circuit breaker. 4. The terminal according to claim 3, wherein an insulative insert plate protruding toward the back of the cradle is formed on the terminal block of the movable terminal, and the terminal block is connected to the carriage via the mounting portion. A plurality of insertion conductors are fixed to each other and inserted into the insertion holes provided on the fixed terminal in a state of being joined to the insertion plate in parallel, and the insertion plate, the guide pins, the terminal block, and the mounting portion are made of insulating resin. A drawer-type circuit breaker characterized by being molded integrally with a. 5. The method according to claim 3, wherein
An insertion hole for inserting the insertion plate and a guide hole for inserting the guide pin are provided in the terminal block of the fixed terminal, and this terminal block is fixed to the cradle side via the fixing part, and the terminal block and the fixing part are integrated with insulating resin. A drawer-type circuit breaker characterized by being molded into. 6. A trolley having a circuit breaker mounted inside a cradle provided on a switchboard is provided so as to be able to be inserted into and removed from an opening side of the cradle. A disconnector consisting of
The fixed contact is fixed to the back of the cradle and connected to the main circuit in the switchboard, the movable contact is fixed to the bogie side and connected to the main contact of the circuit breaker. In the test position of the circuit breaker, the bogie is pulled out to the opening side of the cradle, the disconnector is opened, and an auxiliary circuit for controlling the circuit breaker is arranged on the bogie side, The auxiliary circuit is supplied with power from the switchboard side through a connection terminal comprising a fixed terminal and a movable terminal which can be separated from and separated from each other, the movable terminal is provided on the bogie side, the fixed terminal is fixed to the cradle side, and the connection terminal is separated and connected. Is a drawer-type circuit breaker that is operated by manually inserting and removing the movable terminal from the opening side of the cradle, wherein a manual handle for inserting and removing the movable terminal is provided on the drawer side of the cart, An operation shaft is interposed between the manual handle and the movable terminal, and the operation shaft is rotatably attached to the movable terminal while interlocking with the manual handle, and a projection shaft that faces radially outward on the depth side of the operation shaft. A guide portion provided with a cam groove into which the tip of the projection shaft is fitted is provided on the outer periphery of the operation shaft, and the cam groove has two parallel grooves parallel to the axial direction of the operation shaft. A drawer-type circuit breaker, comprising an inclined groove connecting the parallel grooves obliquely on the depth side. 7. The drawer-type circuit breaker according to claim 6, wherein a return groove connecting the two parallel grooves on the opening side of the cradle is formed. 8. The method according to claim 6, wherein
A drawer-type circuit breaker, wherein the manual handle and the operation shaft are connected via a hinge mechanism.