KR20020085655A - Insertion/withdrawal mechanism for a circuit interrupter - Google Patents

Abstract

Provided is an insertion / extraction device of a breaker which can operate the breaker from the outside while closing the breaker chamber door 26 of the closed switchboard.

The breaker 1 is driven by the rotation of the drive shaft and the drive shaft operated by the external working means from outside the breaker chamber on the bottom portion 2 of the breaker chamber 24 in which the breaker 1 is freely moved at the disconnecting position and the connecting position. It characterized in that it comprises a circuit breaker moving operation means having a lever (13) for moving.

Description

INSERTION / WITHDRAWAL MECHANISM FOR A CIRCUIT INTERRUPTER}

The present invention relates to the insertion / withdrawal device of the circuit breaker mounted in the closed switchboard, and more particularly, to the insertion / withdrawal device of the circuit breaker provided in the breaker chamber free to move in the insertion or connection position and withdrawal, that is, disconnection position.

In Fig. 16 and Fig. 17, a conventional circuit breaker insertion / extraction device will be described. 16 is a front view of the breaker chamber of the closed switchboard, and FIG. 17 is a side view thereof. In this switchboard, the breaker (1) is freely installed at the disconnection position and the connection position, and the breaker room door is opened and closed when the breaker (1) is inserted / drawn, that is, when the movement operation is performed at the disconnection position and the connection position. It is provided on the operation side of the air chamber, that is, the front side (not shown).

In the drawing, reference numeral 1 is a breaker, 2 is a bottom of the breaker, 3 is an interlock pin of the breaker 1, and 4 is a pullout lever of the breaker 1.

The interlock pin 3 is a pin that serves to prevent misoperation of insertion / extraction of the breaker 1 and to prevent the breaker 1 from jumping out of the breaker room in the event of an internal accident.

The opening / closing operation of the circuit breaker 1 in the above structure is opened, and the interlock pin 3 is lifted up by hand after opening the breaker chamber door of the switchboard, that is, the front side of the circuit breaker chamber. Operation was carried out using the withdrawal lever 4.

In the conventional breaker insertion / extraction device, it is necessary to check the connection position (insertion completion position) of the breaker of the inclination lever of the takeout lever by inserting the breaker with the front door of the switchboard open. There were individual differences in time and it took a lot of time to insert.

Moreover, in recent years, since skilled workers have been in short supply, a device can be connected to the circuit breaker and moved to each position of the disconnection in a state where the front door of the switchboard is closed so that even inexperienced persons can work without access to the live parts. The emergence of has been desired.

It is an object of the present invention to obtain an insertion / withdrawal device which is simple and compact in construction while simplifying the operation while eliminating individual differences in time required for insertion / withdrawal operation of the breaker.

Another object of the present invention is to obtain an insertion / extraction device capable of inserting / drawing the breaker even when the door is closed.

BRIEF DESCRIPTION OF THE DRAWINGS The front view which shows the basic structure of this apparatus shown in Embodiment 1. FIG.

2 is a plan view showing an insertion / extraction operation mechanism of the breaker;

3 is a partial front view of the shutter portion of FIG. 1 seen from the front side;

4 is a cross-sectional view along the A-A side of FIG.

5 is a sectional view taken along the line B-B in FIG.

6 is a cross-sectional view taken along the line C-C in FIG.

FIG. 7 is a sectional view taken along the line D-D in FIG. 5; FIG.

Fig. 8 is a view showing the handle as an external operation means in the disconnecting position, (A) is a front view of the handle, (B) is a side view of the handle, and (C) is a state in which the shaft of the handle is connected to the connection port. Section.

Fig. 9 is a view showing the handle at the connection position of the breaker, (A) is a front view of the handle, (B) is a side view of the handle, and (C) is a sectional view of the handle shaft being inserted into the connection port.

10 is a side cross-sectional view showing a breaker door lock means corresponding to an open / closed state of a breaker chamber door 26 of a switchboard, (A) is a side view in a closed state, and (B) is a side view in an open state.

Fig. 11 is a front view of the interlock mechanism between the shutter 11 and the breaker chamber door lock means.

12 is a front view showing a breaker chamber door lock means and an earthing switch disabling means;

13 is a side view of FIG. 12.

14 is a cross-sectional view taken along the line E-E of FIG.

FIG. 15 is a front view of FIG. 14; FIG.

16 is a front view of a breaker chamber of a conventional closed switchboard.

17 is a side view of the breaker chamber.

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

10: borrowing,

11: shutter (charging opening opening means),

12: gearbox (breaker moving operation means, drive force transmission means),

13: lever (breaker moving operation means),

14: roller (breaker moving operation means),

18: shaft (breaker moving operation means),

19: handle (external operation means),

20: shaft (opening and closing state detection means),

21: link (open / closed state detection means),

22: frame (opening and closing state detection means),

29: interlock frame (charging opening disablement means),

29A: distal end (inlet opening and closing means),

29B: tip (inlet opening / closing means),

30: spring (charging opening disablement means),

31 spring end (charging opening opening means),

35: pin for interlocking (earthing switch disabling means),

36: shutter (arcing switch disabling means),

37: lock lever (breaker room door lock means),

38 link (breaker room door lock means),

39: hanging decoration (breaker room door lock means),

40: decoration (breaker door lock means),

41: earthing switch interlock decoration (earthing switch disabling means),

45 lever (opening and closing state detection means),

46: operation window (charging opening opening means).

The invention of claim 1 further comprises a lever for moving the breaker by a rotation of the drive shaft and the drive shaft operated by an external operation means from outside the breaker chamber, at the bottom of the breaker where the breaker is freely moved to the disconnecting position and the connecting device. Characterized in that it comprises a circuit breaker moving operation means having a.

In the invention according to claim 2, in the insertion / withdrawal device of the breaker according to claim 1, the lever is located between the disconnection position and the connection position, and is engaged with the breaker on a straight line connecting the disconnection position and the rotational center and the connection position of the lever. The anti-rotation is freely configured such that the locking end of the lever is alternately located at the disconnecting position side and the connecting position side from the lever rotation center, and at least when the locking end of the lever is at the disconnecting position, the position is beyond the straight line. do.

The invention of claim 3 is characterized in that the breaker chamber has a breaker chamber door that allows the breaker to enter and exit the room.

Embodiment 1.

The first embodiment will be described below with reference to FIGS. 1 to 15.

In addition, as a prior art, the same code | symbol is attached | subjected to the member common or equivalent to what was demonstrated in FIG. 16, FIG. 17, and the description is abbreviate | omitted.

1 to 4, FIG. 1 is a front view showing the basic configuration of the apparatus, FIG. 2 is a plan view showing the insertion / drawing operation mechanism of the breaker, and FIG. 3 is a front view of the shutter portion of FIG. Partial front view. 4 is a cross-sectional view along the A-A side of FIG. 1 to 2 are the bottom portions of the breaker chamber 24, and the bottom of the bottom portion 2 is a breaker chamber door provided on the front side of the breaker chamber 24 shown in Figs. 26, the lower door 27 of the circuit breaker chamber 24 is located on the circuit breaker moving operation means 5 which can operate the circuit breaker 1 from the outside of the circuit breaker chamber 24, and the lower front side of the circuit breaker chamber 24. Shutter release release means (inlet opening / closing disablement means) 6, breaker chamber door lock means 7, earthing switch disabling means 9, and the like are arranged.

1, 8, and 9, reference numeral 10 in FIG. 1 denotes an inlet as a connection portion opened in a vertical portion on the front side of the bottom portion 2, and a gear as a drive shaft constituting the breaker movement operating means 5. The shaft 19a of the handle 19 as an external operation means is inserted into the tip portion 18a (see FIG. 4) of the shaft 18 and is operatively connected. The inlet 10 is normally opened and closed when the handle 19 as the external operation means described later is not connected to the gear shaft 18 as the drive shaft constituting the circuit breaker movement operation means. It is blocked by the shutter 11 as a means. In addition, the shutter 11 as this inlet opening / closing means is mentioned later.

8 and 9, external operation means will be described.

Fig. 8 is a view showing the handle 19 as the external operation means in the disconnecting position of the breaker, (A) is a front view of the handle 19, (B) is a side view of the handle 19, (C) Is a cross-sectional view of the shaft 19a of the handle 19 connected to the gear shaft 18 by inserting the shaft 19a into the inlet 10, and FIG. 9 shows the breaker 1 showing the handle 19 at the connection position. In the figure, (A) is a front view of the handle 19, (B) is a side view of the handle 19, (C) is a state in which the shaft 19a of the handle 19 is inserted into the inlet 10 and connected. It is a cross section of.

The illustrated external operating means is a handle 19 having a shaft 19a to which the front end portion 18a of the gear shaft 18 of the breaker movement operating means 5 is detachably connected.

The inlet 10 has a shape in consideration of the state with the pull-out prevention pin 16 provided on the shaft 19a of the handle 19 so that the handle 19 of the handle 19 during the operation (rotation) of the breaker moving operation means 5 can be performed. It prevents departure.

Reference numeral 17 in the drawing denotes a fitting pin provided on the tip portion 18a of the gear shaft 18 of the breaker movement operating means 5 shown in Fig. 4, and is located on the shaft 19a side of the handle 19. Fit and cut the installed cutout (16a).

(A), (B) and (C) of FIG. 8 indicate the angle of the handle 19 at the disconnection position of the circuit breaker 1 and the positional relationship between the pull-out prevention pin 16 and the fitting pin 17. 9 (A), (B) and (C) are views of the handle 19 in a state where the handle 19 is rotated 195 degrees clockwise in FIG. 2 and the breaker 1 is moved to the connecting position. The positional relationship is displayed.

In FIG. 4, the breaker moving operation means 5 is demonstrated.

The breaker moving operation means 5 includes a gear shaft 18 as a drive shaft having a tip at the inlet 10 and connected to the shaft 19a of the handle 19 as an external operation means, and the gear shaft 18. The gearbox 12 converts the rotational force in the vertical plane into the rotational force in the horizontal plane by receiving the rotational force of, and through this gearbox 12 the semicircle according to the forward and reverse rotation of the gear shaft 18 at the bottom of the breaker 1. And a lever 13 or the like for reciprocating rotation to draw a drawing and inserting / drawing the breaker 1.

At the tip of the lever 13, a roller 14 is provided with the shaft perpendicular to each other, and the two rollers 14 are arranged in parallel in the width direction of the breaker 1 at the bottom surface side of the breaker 1 ( 15), 15, the rotational movement is freely accommodated, and the lever 13 is set to the disconnection position indicated by the circuit breaker 1 on the left side in the drawing and the right direction of the drawing by the reciprocating rotational motion in a semicircle. Move and move between connection positions.

The driving force transmission means between the above-mentioned gear shaft 18 and the lever 13 is operated by the gearbox 12, that is, in this example, within one rotation of the handle 19 by the combination of the helical gears. 1) is configured to be movable between the disconnection position and the connection position.

Next, the operation of the breaker will be described with reference to FIGS. 1 to 4. First, as an initial condition, the breaker 1 is in a disconnecting position, the inlet of the earthing switch disabling means 9 of the breaker 1 described later is opened by the shutter, and the breaker chamber door 26 and the lower door of the switchgear. (27) is in a closed state as shown in Fig. 10A. 10B shows a state in which the breaker chamber door 26 and the lower door 27 are open.

By the way, when operating the circuit breaker movement control means 5 comprised in the circuit breaker room 24 side of a switchboard from the outside using the handle 19 as an external operation means, It is necessary to connect the shaft 19a to the gear shaft 18 as a drive shaft constituting the circuit breaker movement control means 5. This inlet 10 is normally closed by the shutter 11 as an inlet opening / closing means, and is in the state which cannot be connected.

To open the shutter 11, as shown in Figs. 1 and 3, the operation pin 33 protruding from the shutter 11 is dragged in the arrow L direction (left direction in the drawing).

As a result, for example, as opposed to the action of the return spring 31 as the operation means for maintaining the shutter 11 in the closed state, the opening 10 is opened by sliding the opening 10 in the direction in which the shutter 11 is turned off. Open through.

Next, when the handle 19 as the external operating means connected to the gear shaft 18 of the breaker movement operating means 5 is rotated in the clockwise direction, for example, 195 degrees, the driving force is increased at the gear shaft 18. It is transmitted to the gearbox 12 and the lever 13 (see FIG. 4) and rotated 195 degrees in the counterclockwise direction as indicated in FIG. 2. In response to this rotation, the breaker 1 moves from the disconnecting position to the connecting position.

As shown in FIG. 2, the rotation center 13P of the lever 13 is between the actual disconnection position side and the connection position side of the breaker 1.

And the roller 14 as a locking end which the lever 13 engages with the breaker 1 is comprised of the disconnection position P1 in which the roller 14 is located, when the breaker 1 is in the actual disconnection position side. The breaker (in the straight line P1-P2 connecting the pivot center 13P of the lever 13 and the connection position P2 where the roller 14 is located when the circuit breaker 1 is on the side of the virtually connected position) When 1) is in the disconnection position, the position where the roller 14 exceeds the straight line, in this example, the position exceeding 15 degrees is set as the disconnection position P0 of the roller 14 as the locking end, and the pivot center 13P of the lever 13 ), And rotates halfway (P0-P1-P2 = 15 degrees + 180 degrees = 195 degrees) so as to form a semicircle between P0 on the disconnection position side and P2 on the connection position side, and are alternately positioned. .

In this way, when at least the locking end (roller 14) of the lever 13 is located at the disconnection position side, the rectifying operation that rotates the lever 13 by the position P0 beyond the straight line, that is, the external operation means- Even if the breaker 1 is to be inserted into the connection position from the disconnection position manually by another operation not passing through the breaker moving operation means, the movement of the breaker 1 is disabled. The straight line is a line directed to the movement direction of the circuit breaker 1, that is, the insertion / drawing direction.

In this embodiment, as shown in Fig. 1, an escape preventing plate 25 serving as a breaker escape blocking means is provided on the bottom portion 2 of the breaker chamber door 26 to allow the breaker 1 to escape out of the switchboard. It is preventing it.

When the next handle 19 is removed from the inlet 10, the shutter 11 is automatically returned by the return spring indicated by reference numeral 31 in Fig. 3, that is, it moves in the right direction on the drawing so that the inlet 10 Is closed. Moreover, the withdrawal operation of the breaker 1, that is, the movement from the connecting position to the disconnecting position is reversed.

Next, the open / closed state detecting means 102 for detecting whether the breaker 1 is opened or closed, that is, the breaker 1 is closed (ON) or open (OFF), is shown in FIGS. Explain in accordance with 7. 5 is a sectional view taken along the line B-B in FIG. 1 showing the basic configuration of the apparatus, FIG. 6 is a sectional view taken along the line C-C in FIG. 5, and FIG. 7 is a sectional view taken along the line D-D in FIG.

The opening / closing state detecting means 102 has one end engaged with the shutter 11 as the opening / closing means described above, and according to the movement of the shutter 11 to the open position, the opening / closing state display pin as the opening / closing display portion of the breaker ( The open / closed state of the breaker 1 which moves upwardly, i.e., upwards, detects the open / closed state of the breaker 1, while the breaker 1 is lowered to the position shown in Figs. 6 and 7 in the closed state. The display pin 103 is brought into contact with the display pin 103 to prevent movement upward.

The opening and closing state detection means 102 shown in FIGS. 5 to 7 is placed on a link mechanism composed of a shaft 20, a link 21, a frame 22 and a lever 45, and a frame 22 of the link mechanism. And the operation pin 33 is engaged with the lever 45 in accordance with the movement of the shutter 11 to the open position (left direction in the drawing).

First, when the operation pin 33 of the shutter 11 is manually opened in the direction of the arrow in the drawing, the lever 45 whose one end is engaged with the operation pin 33 is linked to this opening operation. The shaft 20 provided on the inner surface side is rotated in the counterclockwise direction by the rotational shaft, the link 21 is driven by the arm 20a, and the frame 22 is pushed upward through the lift pins 23. Thereby, the frame 22 is pushed upwards toward the opening / closing state display pin 103 which moves up and down in accordance with the opening / closing operation of the breaker 1.

The opening / closing state display pin 103 is located upward in the open state and downward in the closed state in response to the opening / closing operation of the circuit breaker 1. The position is maintained as long as it is connected to the contact manipulation mechanism of 1) and the contact manipulation mechanism is not moved.

For this reason, the frame 22 is pushed upward and is not pushed up at the position which abuts on the opening / closing display pin 103. As a result, the frame 22 no longer moves upward, and the shaft 20, the link 21, and the lever 45 are no longer rotated. As a result, further movement of the shutter 11 is impossible, and the charging opening 10 remains closed.

In addition, when the disconnecting device 1 is in an open state, the opening / closing state display pin 103 is positioned above the positions shown in FIGS. 6 and 7, so that the frame 22 abuts on the opening / closing state display pin 103. As a result, the shutter 1 can be moved to the open state.

Next, the breaker chamber door lock means will be described with reference to FIGS. 12 to 13. 12 is a front view showing the breaker chamber door lock means 7 and the earthing switch disabling means 9, and FIG. 13 is a side view of FIG.

The breaker chamber door lock means is a state in which the breaker chamber door 26 is closed by a link mechanism interlocked with the rotation of the gear shaft 18 of the breaker movement operating means 5 when the breaker 1 is inserted into the connecting position. Lock it.

12 to 13, when the handle 19 (FIGS. 8 and 9) as the external operation means is rotated (clockwise direction) in the insertion direction of the breaker 1, the gear shaft 18 is rotated by the rotation of the gear shaft 18 (Fig. The lock lever 37 swings in the clockwise direction about the pin 37a through a link 38 connected to the distal end of the arm 18b attached to the arm 18b. Engage with the stopper 40 of the breaker chamber door 26 and the lower door 27, and the breaker chamber door 26 and the lower door 27 are locked in a closed state.

On the other hand, when the handle 19 (Figs. 8 and 9) is rotated in the drawing direction of the breaker 1 (counterclockwise rotation), the lock lever 37 rotates in the opposite direction to the pin 37a rotation through the link 38. Rocking in the counterclockwise direction), the locking mechanism 39 of the lock lever 37 is released from the fixing of the breaker chamber door 26 and the lower door 27 so that the breaker chamber door 26 and the lower door 27 Is unlocked.

Next, the opening / closing disablement means (charging opening / closing means) 6 for disabling the movement of the shutter 11 as the opening / closing means will be described with reference to FIGS. 10 and 11.

This is also the shutter lock release means of FIG. Fig. 10 is a view showing a side cross-section showing a breaker chamber door lock means corresponding to the open / closed state of the breaker chamber door 26 of the switchboard, wherein (A) is a side view in a closed state, and (B) is in an open state. Side view.

11 is a front view of the interlock mechanism as the shutter 11 and the breaker chamber door lock means.

When the breaker chamber door 26 and the lower door 27 are open, the inlet opening / closing disabling means prohibits the movement of the shutter 11 in a state in which the inlet 10 is closed by the shutter 11. When the breaker chamber door 26 and the lower door 27 are closed, the shutter 11 is movable to the left side in FIG. 11 so that the inlet 10 is opened. This is explained below.

10 and 11, the inlet opening and closing means 6 has an interlock frame 29 built therein based on the support frame 28 screwed to the bottom 2 of the breaker chamber 24. As shown by the arrow P in FIG. 10, the interlock frame 29 is configured to be reciprocated in the horizontal direction so as to abut on the rear surface of the shutter 11, and FIG. 10A. As shown in FIG. 10, the shutter 11 is movable when the interlock frame 29 is moved to the left side in the drawing, and when the interlock frame 29 is moved to the right side in the drawing as shown in FIG. (11) becomes immovable.

Next, the operation of the interlock frame 29 will be described.

The interlock frame 29 is formed by the tension spring 30, and the two front end portions 29A, 29B of the interlock frame 29 are usually extended from the bottom 2 of the breaker chamber 24. It operates to protrude toward the back side of the breaker chamber door 26 and the lower door 27 (together referred to as only a door) from the hole formed in the vertical portion.

Therefore, when the door is opened as shown in FIG. 10 (B), the tip portion 29A protrudes to the rear surface side of the breaker chamber door 26, and the tip portion 29B protrudes to the rear surface side of the lower door 27, respectively. do. In this case, in order for the interlock frame 29 to advance in the section 9 between the rear surface of the vertical portion on the front side of the bottom portion 2 and the front side of the support frame 28 of the interlock frame 29, the interstitial space 9 The movement of the shutter 11 which is comprised so that a movement is possible is prohibited.

11 shows a state in which the side of the interlock frame 29 and the left end of the shutter 11 abut against the shutter 11 that is movable in the arrow Q direction at a position which prohibits the movement to the left in the drawing. . In addition, the interlock frame 29 is arranged to be movable in the thickness direction of the ground in FIG.

On the other hand, when at least one of the breaker chamber door 26 and the lower door 27 is closed as shown in Fig. 10 (A), the two leading ends 29A, 29B of the interlock frame 29 are pressed against the door to open the interlock frame. Since 29 is pushed back into the switchboard to retreat from the gap, the interference between the interlock frame 29 and the shutter 11 is eliminated, and the shutter 11 can be moved to the left in FIG.

Next, the shutter to the opening and closing means in Figs. 1 and 3 will be described. The shutter 11 is a plate-like member configured to be movable in left and right directions along the rear surface of the vertical portion of the bottom portion 2 on the vertical portion rear surface of the bottom portion 2 and the return spring 31 ( It is operated to the right side by FIG. 3), and is comprised so that the position which closes the intake opening 10 (following closed position) is shown as shown. This closed state is maintained in the state where the operation pin 33 provided in the shutter 11 is in contact with the right end in the drawing of the slit 32 formed in the vertical portion of the bottom portion 2.

In this closed state, since the position of the operation window 46 opened in the shutter 11 and the inlet 10 opened in the front side of the bottom part 2 is shifted | deviated, the operation window 46 and The opening with the inlet 10 does not coincide, and therefore, the shaft of the handle 19 as the external operating means cannot be inserted into the inlet 10.

In total, four pins protrude from the shutter 11.

One is the operation pin 33 for sliding, in addition to the two support pins 34 for supporting the horizontal movement of the shutter 11, and the earthing switch operation handle of the circuit breaker 1 described later (hereinafter, only ES). An interlock pin 35 for interlocking the shutter 36 (hereinafter also referred to simply as ES shutter) of the earthing switch that opens and closes the inlet 51 as a receiving place into which the handle is inserted is provided. This earthing switch is a grounding switch so that the main circuit becomes the ground potential (Fig. 14).

Next, the earthing switch and the earthing switch disabling means will be described with reference to FIGS. 1, 3, 12 and 15. 13 and 14 are side views of the ES shutter which opens and closes the inlet 51 through which the ES handle 50 is charged when the earthing switch is switched, and FIG. 15 is a front view thereof. Reference numeral 42 in Fig. 14 denotes a switch lever having a depression opening for receiving an ES handle, and reference numeral 36 in Fig. 15 denotes an ES shutter.

The earthing switch disabling means disables the operation of the earthing switch in conjunction with the movement of the shutter 11, that is, the opening / closing means to the open position, and operates the closed room door by the blocking room door lock means in the closed state. In conjunction with, the operation of the earthing switch is disabled.

In FIGS. 1 and 3, when the shutter 11 is moved to the left side in the drawing through the operation pin 33, the shaft 10 of the handle 19 can be borrowed by coinciding with the insertion hole 10 and the operation window 46. .

At the same time, by the movement of the shutter 11, the interlocking pin 35 for interlocking the ES shutter 36 in the closed state also slides to the left, and the ES shutter 36 is locked from the open state to the closed state.

12 and 13, the gear shaft 18 and the lock lever 37 of the breaker movement operating means 5 are linked via a link 38. On both ends of the lock lever 37 fixed to the central pin 37a in the longitudinal direction, a hanging ornament 39 is fixed by screws, and the breaker chamber door 26 side, that is, the breaker chamber door 26 and the lower door. About the decoration 40 provided in each of (27), it is comprised so that a latch and detachment may be caught freely according to the rocking | fluctuation of the lock lever 37. FIG. Reference numeral 41 in the figure is an earthing switch lock type, which is screwed to the lock lever 37, and in the locked state of the breaker chamber door 26 and the lower door 27, the upper end of the ES shutter 36 is lowered. Push to keep closed.

In the above configuration, when the shutter 11 returns to the closed state, that is, to the right, the interlock pin 35 becomes invalid, but instead, the earthing switch interlock 41 retains the ES shutter 36 in the closed state. Keep it.

14 and 15, reference numeral 42 in FIG. 14 denotes a switch lever (hereinafter referred to as ES lever) having an ES inlet 51 for receiving the ES handle 50, and reference numeral 36 in FIG. ES shutter.

In FIG. 14, the ES lever 42 is a conventional body, and is secured to the pin 42a in the longitudinal center thereof and configured to be swingable. On one end side of the ES lever 42, an ES inlet 51 serving as an opening for receiving the shaft of the ES handle 50 is opened, and the other is engaged with the ES main body 101 through the link 104. As shown in FIG.

As shown in Fig. 15, when the ES lever 42 is operated and the ES inlet 51 is positioned above the drawing (dotted and dashed line in Fig. 14), the switch 101 enters ("ES in"). ), The switch 101 is disconnected (shown as "ES clause") when located below (solid line position of FIG. 14).

In Fig. 12, when the gear shaft 18 is rotated 195 degrees clockwise, i.e., in the insertion direction of the breaker 1, at the handle 19 as the external operating means, the breaker chamber door lock means 7 is connected via the link 38. The lock lever 37 rotates 40 degrees clockwise to lock the breaker chamber 26 and the lower door 27 in the closed state.

At this time, the breaker 1 is moved from the disconnected position to the connected position by the breaker moving operation means 5, and the breaker chamber door 26 and the lower door 27 cannot be opened.

On the other hand, the earthing switch lock 41 constituting the earthing switch disabling means 9 operates and locks the ES shutter 36 in the closed state. That is, the ES shutter 36 is in a state indicated by reference numeral 36b in FIG. 15 and closes the ES inlet 51. In this example, when the ES inlet 51 is at a predetermined connection position of the ES inlet or ES section, the plate-shaped connecting member provided with two holes (ES inlet hole 100) connected to the ES inlet 51 is provided. Since both ES charging holes 100 are blocked, the shaft of the ES handle 50 cannot be inserted into the ES inlet 51 of the ES switch lever 42.

On the other hand, the earthing switch input certificate cannot insert the circuit breaker 1 from the disconnection position into the connection position. As shown in Fig. 14, the projection 43 provided at the tip of the ES switch lever 42 prevents the return to the open position of the ES shutter 36 and prevents the movement of the interlock pin 35 in the left direction. This is because it is impossible to open the shutter 11 as the opening / closing means.

According to the invention of claim 1, since the insertion / extraction lever for the circuit breaker is disposed below the circuit breaker, the entire apparatus can be made compact.

According to the invention of claim 2, since the direction of the lever coincides with the insertion direction at the circuit breaker connection position, when the circuit breaker is pushed forward, the force exerted on the lever is transmitted to the pivot shaft of the lever at the dead point. It does not act as a moving force on the lever, and therefore the breaker is not protruded. In addition, since the lever position at the breaker disconnection position is set to a position rotated more than 180 degrees from the connecting position, the lever can be prevented from rotating in the insertion direction, and even if the breaker is pushed into the connecting position by hand, I can't.

According to the invention of claim 3, since the breaker chamber door can be operated without opening and closing, the work efficiency can be increased.

Claims (3)

Inserting / drawing circuit breaker for circuit breaker provided at the bottom part 2 of circuit breaker room 24 and having a circuit breaker 1 which is movable in disconnection position (FIG. 2 solid line) and connection position (FIG. 2 dashed line) in circuit breaker room. An apparatus comprising: a circuit breaker moving operation means (5) for moving a circuit breaker (1) to a disconnection position (FIG. 2 solid line) and a connection position (FIG. 2 chain line), wherein the circuit breaker movement operating means (5) comprises: An external operation means 19 from the outside is connected between the drive shaft 18 that can be operated and the drive shaft and the circuit breaker 1 to connect the breaker 1 to the disconnection position (solid line in Fig. 2) and the connection position. It is connected between the lever 13 which moves to (FIG. 2 chain line), and the said drive shaft 18 and the said circuit breaker 1, and the rotational movement of the said drive shaft is carried out with the said disconnection position (FIG. 2 solid line) of the said circuit breaker. A motion converter for moving in order to convert the linear motion between the connection positions (Fig. 2) Breaker insertion / withdrawal device. 2. The lever 13 is rotatable between the disconnecting position P1 corresponding to the disconnecting position of the breaker and the connecting position P2 corresponding to the connecting position of the breaker, and the disconnecting position P1. And the connecting position (P2) is in a substantially radially opposite position with respect to the center of rotation of the lever (13). The circuit breaker (3) according to claim 2, wherein the lever (13) can move from the connecting position (P2) to the disconnecting position (P1) and again to the inverting position (P0) over which it has moved by a predetermined distance. Breaker insertion / withdrawal device, characterized in that 1) is prevented from returning to the connecting position (P2) by the pressing force applied accidentally.