JP2002135919A - Switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switchgear with high safety for a maintenance person by opening a door of a breaker room only when the inside of the breaker room is turned into non-charged state. SOLUTION: An interlock mechanism is provided between a main circuit and a door 23 which is structured such that the door 23 can be opened only when the main circuit is in non-charged state, that is, an interlock mechanism which enables the opening of the door 23 only when a breaker 21 is in the isolating position is added. With this set-up, a conductor is in non-charged state. In this case, a power failure of a bus causes a power failure of the entire system, which is practically impossible so that equivalent non-charged state is realized by covering the main circuit terminal on the bus side which is the only charged part with a metal shutter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a switchgear with an improved interlock mechanism.

[0002]

2. Description of the Related Art An example of a conventional switchgear of this type is as follows.
This will be described with reference to FIG.

[0005] In FIG. 21, a control line room 9 in which a switchgear protection and measurement control device is mounted is disposed in the upper front part of the switchgear. The circuit breaker 21 is mounted in the middle stage of the switchgear 1.

[0004] The circuit breaker 21 is arranged at a connection position between the bus 3 and the load cable 4, and can be pulled out to a disconnecting position in a forward direction by manual operation of the handle 10 by a maintenance person. The circuit breaker 21 and the busbar 3 or the load cable 4 are detachably connected by fingers (not shown) attached to the conductors 7 and 8 of the circuit breaker in the main circuit disconnecting insulators 5 and 6. A current transformer 11 is provided on the main circuit insulator 6 connected to the load, and protects the circuit by measuring the current of the switchgear and operating the circuit breaker. On the other hand, a grounding switch 12 is disposed below the main circuit insulator 6, and functions to release the remaining charging current on the load side to the ground and reliably ground the load.

[0005] A control line room door 13 and a circuit breaker room door 14 are disposed on the front front surface of the switchgear. Further, a main circuit shutter 17 is provided, and the main circuit shutter 17 has openings of main circuit disconnection insulators 5, 6 in which the main circuit terminals 18, 19 are integrally molded when the circuit breaker 21 is in the disconnection position. It functions as an automatic opening / closing shutter mechanism that covers the opening and opens the opening at the connection position.

[0006] In order to ensure the safety of personnel such as maintenance personnel, generally, a mechanical interface is provided between the breaker 21 itself, which is a draw-out type device, and between the breaker 21 and the grounding switch 12. A lock mechanism is provided.

Hereinafter, the above-described interlock mechanism will be enumerated and described.

(1) The interlock mechanism is provided with a means for preventing the plug 15 for supplying power to the control circuit of the circuit breaker 21 from coming off when the circuit breaker 21 is at the connection position. This means is to prevent the power circuit of the circuit breaker from being lost.

(2) The interlock mechanism has means for preventing the circuit breaker 21 from being pulled out when the circuit breaker 21 is at the connection position and the contact of the valve 16 of the circuit breaker is closed. This means is to prevent the arc from being generated by moving the circuit breaker in an energized state.

(3) The interlock mechanism has means for preventing the ground switch 12 from being closed when the circuit breaker 21 is in the connection position. This means is to prevent a ground fault accident that occurs when the circuit breaker closes the ground switch at the disconnection position and grounds the current-carrying part.

(4) The interlock mechanism allows the plug 15 to be pulled out at the disconnecting position of the circuit breaker 21 and the circuit breaker 21 when the plug 15 of the circuit breaker 21 is not inserted.
Means are provided for preventing movement to the connection position. This means is for preventing the power supply circuit of the circuit breaker 21 from being lost only at the disconnection position.

[0012]

However, in the case of the switch gear described above, when the valve 16 of the circuit breaker 21 is opened to open the circuit breaker room door 14 and the circuit breaker 21 is pulled out, the main circuit shutter 17 is pulled out. Is open and the bus 3 is always in a charged state. Therefore, there is a risk that a maintenance worker may accidentally touch the main circuit terminal 18 or the conductor 19 of the circuit breaker 21 to cause an electric shock.

Basically, it is desirable that the door of an electric device be opened only when the inside thereof is not charged, which is a problem in terms of safety.

It is an object of the present invention to provide a switchgear in which the door for the breaker room is opened only when the inside of the breaker room is not charged, thereby greatly improving the safety for maintenance personnel.

[0015]

In order to solve the above-mentioned problems, the present invention provides an interlock mechanism between a main circuit device and a circuit breaker room door, and only when the main circuit is not charged, the circuit breaker room door. Open. That is, an interlock mechanism that opens the circuit breaker room door only when the circuit breaker is at the disconnection position is added. As a result, the conductor enters a non-charged state. In this case, the power outage of the bus results in a power outage of the entire system, and it is practically impossible. Therefore, the bus-side main circuit terminal, which is the only charging unit, is covered with a metal shutter to realize an equivalently uncharged state.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a switchgear according to the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view of a switchgear 20 according to the present embodiment, and the same parts as those in FIG. 21 are denoted by the same reference numerals and description thereof will be omitted.

In FIG. 1, the switchgear of this embodiment comprises a circuit breaker 21, a draw-out device 22, a ground switch 12, and a circuit breaker room door 23. This circuit breaker room door 23 is the only one that can be opened and closed so that maintenance personnel can access the main circuit, similarly to the conventional switchgear shown in FIG.

FIG. 2 is a detailed view of the drawer 22 as viewed from the direction of arrows AA in FIG. 1, and shows the state of each mechanism when the circuit breaker 21 is connected. An externally threaded circuit breaker moving shaft 24 for moving the circuit breaker 21 passes through the center of the drawer 22. This breaker moving shaft 24
Is fitted in the female screw 25, and the female screw 25 is housed in the box 26. The box 26 is mechanically connected to the circuit breaker 21 by bolts 41 via the circuit breaker 21 and the connection plate 40. Therefore, when the shaft 24 is rotated, the box 26 moves forward. Therefore, the circuit breaker 21 is moved by the box 26 which has advanced in the front direction.
Can be disconnected. The drawer device 22 includes a ground switch operating mechanism 2 for driving the ground switch 12.
7 are provided.

FIG. 3 is a detailed sectional view of the operation mechanism 27 for operating the grounding switch 12 as viewed from the direction of arrows BB in FIG. 2, and as shown in FIG. Are connected by a link 28. The operating mechanism 27 has an externally threaded ground switch drive shaft 29 similar to the breaker moving shaft 24, and a link 28.
And a female screw 30 integrated with the connecting portion of the second member. FIG. 3 shows a state where the ground switch 12 is turned off.
By rotating the shaft 29, the female screw 30 moves in the depth direction from the front, whereby the ground switch 12 is turned on.

On the front surface of the drawer 22, a circuit breaker 21 is provided.
An operation panel 50 containing mechanical components for operating an interlock function between the ground switch 12 and the circuit breaker room door 23 is arranged. This operation panel 50
It is fixed to the switch gear 20. The drawer 22
The circuit breaker position detection rods 80 are disposed one by one on the left and right sides, respectively, so as to penetrate the front panel 81 of the drawer 22.

FIG. 4 is a view as seen from the direction of arrows CC in FIG. 2, and a force is constantly applied to the breaker position detecting rod 80 in the depth direction by a spring 85. A circuit breaker position detection rod driving plate 82 for driving the same shape of the circuit breaker position detection rod 80 is fixed to one end of the circuit breaker position detection rod 80 with a bolt. A breaker room door opening / closing control plate 83 is fixed to the other end of the breaker position detection rod 80.

FIG. 5 is a view as seen from the direction of arrows DD in FIG. 2, and the control switch 84 for the ground switch is fixed with bolts.

Next, the operation of the interlock mechanism of the switchgear according to the present embodiment configured as described above when the circuit breaker 21 is in the connected state will be described.

FIG. 6 shows the internal structure of the operation panel 50 as viewed from the front of the switchgear when the circuit breaker 21 is in the connection position and the valve 16 of the circuit breaker 21 is closed. The circuit breaker 21 includes a valve state detection rod 51 that moves up and down in accordance with opening and closing of the valve 16. On the operation panel 50,
Arrange two holes 52 for rotating the two shafts 24,
An interlock mechanism plate 53 having two holes 72 of the same diameter as the hole 52 inside these, and a ground switch interlock mechanism plate 54 are configured to be slidable left and right.

A handle 55 for sliding the interlock mechanism plates 53 and 54 is attached to the interlock mechanism plates 53 and 54. That is, if a force is applied to the handle 55 in the left direction and the hole 52 and the hole 72 match, an operation handle (not shown) can be inserted. The interlock mechanism plate 53 is rotatably connected to a shaft 58 (see FIG. 2) penetrating back and forth by joining plates 56 and 57 with pins 59. Valve state detection rod detection plates 60 and 61 are fixed to the shaft 58 (see FIG. 2).

In FIG. 6, since the valve 16 of the circuit breaker 21 is closed, the valve detection rod 51 has moved relatively downward compared to the open state, and the interlock mechanism plate 5
The rod detecting plate 60 interferes with the valve opening / closing detecting rod 51 even if the user tries to slide the knob 3 to the left by applying a force to the handle 55.

Therefore, the interlock mechanism plate 53 cannot slide to the left. Therefore, the circuit breaker operation handle cannot be inserted. Similarly, as shown in FIG. 5, when the ground switch interlock mechanism plate 54 is slid to the left by applying a force to the handle 55, the ground switch interlock mechanism plate 54 and the control plate 84 interfere with each other, and eventually the ground switch The interlock mechanism plate 54 cannot slide to the left. Therefore, the ground switch operation handle cannot be inserted.

Next, an interlock mechanism relating to the door 23 will be described. 7 is a front view of the circuit breaker room door 23, FIG. 8 is a cross-sectional view of the door 23 as viewed from an arrow EE, and FIG.
It is the figure seen from F.

7 to 9, the door 23 is provided with a hinge 99 on the left side and a frame 91 having a plurality of door pins 90 on the right side. The door 23 is slid downward, and the door pin 90 is
Into the groove bottom 93 of FIG. Thereby, the door 23 realizes a closed state.

The hook plate 92 is fixed to the right side panel 97 of the switchgear 20. A door handle 94 is attached to the frame 91.
Make 1 work. The frame 91 is mounted between the frame support plate 95 and the bent portion 96 in the depth direction of the door.
96 has the same number of oval holes 96 as the door pins 90. To open the door, the frame 91 is slid up to open the door pin 90 from the bottom 93 of the pin hooking plate 92, and the handle 9
4 by pulling it forward.

Further, on the bottom surface of the frame 91, door opening / closing control pins 98 and 99 having a narrow space are fixed so as to penetrate the door 23. In FIG. 10, which is a partially detailed view of FIG. 2, a slot 100 is formed in the circuit breaker room door opening / closing control plate 83 attached to the tip of the circuit breaker position detection rod 80.

Thus, when the circuit breaker 21 is in the connection position,
The constricted portion of the door opening / closing control pin 98 fits in the groove of the slot 100, and the door handle 94 cannot be opened even if an attempt is made to open the door 23 by applying a force upward.

Since the door 23 cannot be opened, the control plug 15 of the circuit breaker 21 shown in FIG.
Control plug receiver 1 attached to right side panel 97
02 cannot be attached or detached.

As described above, in the present embodiment, when the circuit breaker 21 is at the connection position, the following interlock functions are realized.

(1) When the breaker 21 is at the connection position, the plug 15 for supplying power to the control circuit of the breaker 21
Can not be pulled out.

(2) When the circuit breaker 21 is at the connection position and the valve 16 of the circuit breaker 21 is closed, the circuit breaker 21 cannot be pulled out.

(3) The ground switch 12 cannot be turned on unless the breaker 21 is in the disconnection position, and the door 23 cannot be opened.

Next, the operation when the circuit breaker 21 is at the connection position and the valve 16 of the circuit breaker is open will be described with reference to FIG. 6 and the like and FIG. 11 showing the circuit breaker operation panel 50. That is, when the valve 16 of the circuit breaker 21 is opened, the valve detection rod 51 moves upward, but the interlock mechanism plate 53 slides to the left without interfering with the rod detection plate 60. Thereby, the hole 52 and the hole 7
Since 1 is located at the same position, a circuit breaker operating handle (not shown) can be inserted, and the circuit breaker 21 can be moved forward.

Next, the operation of the interlock mechanism when the circuit breaker 21 is located halfway between the connection position and the disconnection position will be described. That is, while the circuit breaker 21 is being pulled out to the disconnection position by rotating the circuit breaker moving shaft 24 with the operation handle, the following operation is performed.

(1) When the circuit breaker 21 is at the connection position, the plug 15 for supplying power to the control circuit of the circuit breaker 21 does not come off.

(2) The ground switch 12 cannot be turned on unless the breaker 21 is in the disconnection position, and the breaker room door 23 cannot be opened.

These interlock mechanisms are clearly retained, except that the box 26 is moved forward only when the circuit breaker 21 shown in FIG. 12 is being disconnected.

Next, the operation of the interlock function when the circuit breaker is at the disconnection position will be described with reference to FIGS. 12, 13 and 20. In addition, FIG.
It is sectional drawing seen from I. In the drawing, the box 26 is moved to a position where the circuit breaker 21 is at the disconnection position by rotating the circuit breaker moving shaft 24 by an operation handle (not shown). A breaker position detecting rod operating pin 110 is fixedly penetrated to the box 26 so as to operate integrally therewith.
And try to move forward. That is, the door opening / closing control pin 98 fits into the slot position of the slot 100 of the circuit breaker room door opening / closing control plate 83 attached to the tip of the breaker position detection rod 80.

As a result, the door handle 94 can be moved upward, so that the door pin 90 is disengaged from the pin hooking plate 92 from the bottom 93 and the circuit breaker chamber door 23 is opened.

Similarly, as shown in FIG. 14, when the breaker position detecting rod drive plate 82 moves forward by overcoming the force of the spring 81, the ground switch interlock mechanism attached to the tip of the breaker position detecting rod 80. The ground switch interlock mechanism plate 54 does not interfere with the control plate 84 of the plate 54, and the holes 52 and the holes 72 of the ground switch shaft 24 are aligned as shown in FIG. 15, so that the operation handle can be inserted. Become like

As described above, an interlock mechanism for opening the door 23 and an interlock mechanism for turning on the ground switch 12 when the circuit breaker 21 is in the disconnection position are realized. Will be. In this case, when the door 23 is opened, an interlock mechanism for preventing the circuit breaker 21 from being moved to the connection position accordingly is required. The function will be described with reference to FIGS.

When the door 23 is closed, the door open / close control pin 98 shown in FIGS.
The right side of the 0 rotation shaft 121 is pushed, thereby rotating the seesaw plate 110 to the right. Therefore, the L portion of the seesaw plate 110 does not stop the operation of the interlock mechanism plate 53.

However, when the handle 94 is lifted upward to open the door 23, the frame opening and closing control pin 98 of the frame 91 is raised upward. As a result, the seesaw plate 110
The seesaw plate 11 due to the effect of gravity.
0 is the L part and the interlock mechanism plate 5 to keep the horizontal.
The L part of No. 3 is caught. As a result, the interlock mechanism plate 53 cannot slide to the left, the operation handle cannot be inserted as described above, the door 23 remains open and does not close, and the circuit breaker 21 cannot move in the connection position direction. become.

Next, an interlock mechanism for preventing the circuit breaker 21 from moving to the connection position when the ground switch 12 is closed will be described with reference to FIG. 16 showing the case where the ground switch 12 is closed. In the figure, when the ground switch 12 is closed, the ground switch shaft connecting portion 152 integrated with the female screw 30 opens the operation of the ground switch opening / closing control rod 150 to be in a free state. That is, the grounding switch opening / closing control rod 150 is pushed by the spring 151 and moves in the depth direction of the switchgear.

The circuit breaker movement control rod 150 is partially provided with a groove, and the end of the interlock mechanism plate 53 is fitted into the square hole 201 of the band plate 200 in FIG. The plate 200 operates integrally. Therefore, the end of the band plate 200 interferes with the end of the breaker movement control rod 150, and the interlock mechanism plate 53 cannot slide to the left.

When the grounding switch 12 is open, the grounding switch shaft connecting portion 152 pushes the circuit breaker movement control rod 150 downward (to the front), and the band plate 200 moves the circuit breaker movement control rod 1.
The interlock mechanism plate 53 moves to the left through the groove portion 50, and the circuit breaker 21 can be moved by inserting the operation handle. Circuit breaker control plug 1
In Fig. 5, since the door 23 is opened, the maintenance person can attach and detach the control plug receiver 102 with his / her hand. in this case,
In order to satisfy the condition (4) of the interlock mechanism at the beginning, an interlock mechanism that prevents the circuit breaker 21 from being connected to the main circuit unless the control plug 15 is electrically connected to the control plug receiver 102 is required. . This is shown in FIG.
18 and FIG. 19 which is a cross-sectional view taken along the line 7-7 in FIG.

FIG. 17 is an overall view of the control plug receiver 102, to which a receiving connector 130 is attached. The connector 130 is wired so that control power can be supplied from outside (not shown). In FIG. 18, a plug connector 131 wired from a control circuit of the circuit breaker 21 is connected from the circuit breaker 21 side. The side including the insertion connector 131 is called a control plug 15. This plug connector 131 is a metal flat plate 132.
, And a cylindrical pin 133 having a groove cut in the middle from the flat plate 132 is fixed. A handle pin 134 having a threaded end and a door opening / closing control pin 135 are connected by a nut 136. FIG. 18 shows a state where the control plug 15 is disconnected. In this state, the door opening / closing control pin 135 interferes with the door 23, and the door 23 does not close. As described above, an interlock mechanism that prevents the circuit breaker 21 from moving in the connection direction unless the door 23 is closed is realized.

Next, the case where the control plug 15 is inserted is shown in FIG.
8 will be described. In the figure, a cylindrical pin 133 of the control plug 15 is replaced with a collar 200 having a slightly larger inner diameter than the cylindrical pin.
When it tries to insert it, it interferes with the daruma hole 137 machined in the arc plate 136, and the control plug cannot be inserted. Therefore, the handle pin 134 is slid to the left by overcoming the rightward force of the spring 138. With this, the arc plate 1
36 rotates to the right, and moves until the center of the large hole of the daruma hole 137 coincides with the center of the collar 200. By this operation, the cylindrical pin of the control plug 15 can be inserted into the inner diameter portion of the collar 200, and the receiving side connector 130 and the insertion connector 131 are engaged with each other and become electrically connected.

At the time of this insertion operation, the cylindrical pin 133 is directed toward the paper surface by the winding spring 139, so that the rotation control plate 1 is rotated.
Numeral 40 rotates forward about the axis 141, and the cylindrical pin 133
The door plate opening / closing control pin is moved rightward by the rightward force of the spring 138, and the arcuate plate 136 is now rotated leftward. In this case, since the groove portions of the arc plate 136 and the cylindrical pin 133 are fitted, the control plug 15 cannot be separated as it is. When removing the control plug 15, the handle pin 134 is slid to the left toward the paper surface, and the cylindrical pin 133 is fitted into the large portion of the daruma hole 137, and the control plug 15 can be separated.

In the separated state, the state returns to the state shown in FIG. 19, and the bolt 142 comes into contact with the rotation control plate 140.
The handle pin 134 has a function of sliding only to the left.

Next, a method of pulling out the circuit breaker 21 out of the switchgear will be described with reference to FIG. That is, when the circuit breaker 21 is in the disconnecting position, the bolt 4
1 is removed, and the circuit breaker 21 is separated from the access mechanism.
Thereafter, when the connecting plate 40 is rotated downward about the shaft pin 220 in FIG. 12, the circuit breaker 21 can be pulled out of the switchgear by a lifter (not shown).

When the valve 16 of the circuit breaker 21 is
Is closed, the valve state detection rod 51 interferes with the block 221 attached to the front of the drawer mechanism in FIG. 20, so that the circuit breaker 21 cannot be inserted into the switchgear. That is, when the valve is closed, it cannot be moved to the connection position.

The interlock mechanism when the circuit breaker 21 is between the disconnection position and the connection position and when it is at the connection position are as described above.

As described above, in the switchgear of this embodiment, first, the circuit breaker 21 can be moved with the door 23 closed. Under this premise, the interlock function described below is exhibited.

First, when the circuit breaker 21 is connected to the valve 1
6 is closed, the door 23 does not open and the ground switch 12
Cannot be closed, and the circuit breaker 21 cannot move to the disconnection position.

Second, when the circuit breaker 21 is connected to the valve 1
6 is open, the door 23 does not open and the ground switch 12
Cannot be closed, and the circuit breaker 21 can move in the disconnection position direction.

Third, when the circuit breaker 21 is in the middle of disconnection, the door 23 does not open, the ground switch 12 cannot be closed, and the circuit breaker 21 can move in the disconnection connection direction.

Fourth, when the circuit breaker 21 is in the disconnecting position, the door 23 is opened and the ground switch 12 can be closed. When the ground switch 12 is closed, the circuit breaker 21 moves in the connection position direction. It cannot move, and the control plug 15 can be attached and detached. In this case, the door 23 does not close with the control plug 15 removed. If the door 23 is not closed, the circuit breaker 21 cannot be moved to the connection position.

Fifth, when the circuit breaker is outside the switchgear, it cannot be carried into the switchgear when the valve 16 of the circuit breaker 21 is closed.

[0066]

As described above, according to the present invention, the door is opened only when the interior of the circuit breaker is not charged, so that the external moving mechanism of the circuit breaker and the circuit breaker and the ground are connected. It is possible to provide a switchgear which is fully equipped with not only a switch but also an interlock mechanism of a control plug and a circuit breaker, and which has extremely enhanced safety for maintenance personnel.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an embodiment of a switchgear according to the present invention.

FIG. 2 is a plan view of a circuit breaker drawer when the circuit breaker is at a connection position as viewed from the direction of arrows AA in FIG. 1;

FIG. 3 is a side sectional view of the grounding switch operating mechanism as viewed from the direction of arrows BB in FIG. 2;

FIG. 4 is a view taken along arrow C- in FIG. 2 when the circuit breaker is at the connection position.
FIG. 4 is a side view around one of the circuit breaker position detection rods as viewed from C.

FIG. 5 is a view taken along arrow D- in FIG. 2 when the circuit breaker is at the connection position.
The side view around the other breaker position detection rod seen from D.

FIG. 6 is a front view of the operation panel and its internal structure when the circuit breaker is at the connection position.

FIG. 7 is a diagram of a circuit breaker room door and its internal structure viewed from the front.

8 is a side view of the circuit breaker room door as viewed from the direction of arrows EE in FIG. 7;

9 is a plan view of the circuit breaker room door as viewed from the direction of arrows FF in FIG. 7;

FIG. 10 is a structural diagram illustrating an interlock mechanism when the circuit breaker room door and the circuit breaker are at the connection position.

FIG. 11 is a front view of the operation panel and its internal structure when the valve is in an open state.

FIG. 12 is a plan view of the drawer of the circuit breaker when the circuit breaker is in the disconnection position as viewed from the direction of arrows AA in FIG. 1;

FIG. 13 is a structural diagram illustrating an interlock mechanism when the circuit breaker room door and the circuit breaker are at the disconnection position.

FIG. 14 is a view C of FIG. 2 when the circuit breaker is in the connection position.
The side view around the other breaker position detection rod seen from −C.

FIG. 15 is a front view of the operation panel and its internal structure when the circuit breaker is at the connection position.

FIG. 16 is a side view of the ground switch operating mechanism when the ground switch is closed.

FIG. 17 is a detailed sectional view of the control plug receiver of FIG. 1;

FIG. 18 is a cross-sectional view taken along the line GG in FIG. 17;

FIG. 19 is a detailed view of a portion H in FIG. 17;

FIG. 20 is a cross-sectional view taken along the line II in FIG. 13;

FIG. 21 is a side sectional view of a conventional switchgear.

[Description of Signs] 15: control plug, 20: switchgear, 21: breaker, 22: drawer, 23: door for breaker room, 24: breaker moving shaft, 25: female screw, 26: box, 27
... Ground switch operating mechanism, 28 ... Link, 29 ... Ground drive shaft, 30 ... Female screw, 40 ... Connecting plate, 41 ...
Bolt, 50: Operation panel, 51: Valve open / close detection rod, 52: Operation panel side hole, 53: Circuit breaker interlock plate, 54: Ground switch interlock plate, 55: Handle, 56, 57: Connection plate, 58 ... Shaft, 59 ... Pin, 60, 61 ... Valve open / close detection rod detection plate, 72 ...
Interlock plate side hole, 80 ... Breaker position detection rod,
81: drawer device, 82: breaker position detection rod drive plate,
83: breaker room door opening / closing control plate, 84: ground switch interlock plate control plate, 85: spring, 90: door pin, 9
DESCRIPTION OF SYMBOLS 1 ... Frame, 92 ... Hook plate, 93 ... Groove bottom part, 94 ... Door handle, 96 ... Oval hole processing part, 97 ... Right side panel, 98 ...
Door opening / closing control pin, 99: door bent portion, 100: slot,
Reference numeral 102: control plug receiver, 110: breaker position detection rod operating pin, 121: rotary shaft, 125: seesaw plate, 13
0: connector, 131: plug-in connector, 132: flat plate,
133: cylindrical pin, 134: handle pin, 135: door opening / closing control pin, 136: arc plate, 137: daruma hole, 13
8 ... spring, 139 ... spring, 140 ... rotation control plate, 1
41: shaft, 142: bolt, 150: ground switch opening / closing control rod, 151: spring, 152: ground switch shaft connecting portion, 200: band plate, 220: shaft pin, 221: block, 300: collar.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideo Himi 1-1-1, Shibaura, Minato-ku, Tokyo Inside Toshiba Corporation Head Office (72) Inventor Takashi Hino 1-1-1, Shibaura, Minato-ku, Tokyo Stock (72) Inventor Tomonari Kurata 1-1-1, Shibaura, Minato-ku, Tokyo F-term (reference) 5G012 BB10 CC03 CC04 FF06 GG03

Claims (3)

[Claims] 1. A circuit breaker having a connection position and a disconnection position set in a panel, supplied with control power through a control power plug, and fixed with a driving fixing screw, a circuit breaker room door, and a grounding switch. When the circuit breaker is at the connection position and the main circuit contact of the circuit breaker is closed, the disconnection operation of the circuit breaker is disabled and the circuit breaker chamber door is opened. Means for disabling and closing the grounding switch; and enabling disconnection operation of the circuit breaker when the circuit breaker is in the connection position and the main circuit contact of the circuit breaker is open, and Means for disabling the device room door and disabling the grounding switch; and disabling the circuit breaker room door when the circuit breaker is located halfway from the connection position to the disconnection position, and Close ground switch Permitting and allowing the circuit breaker chamber to open the circuit breaker chamber door at the disconnection position and closing the ground switch, enabling the circuit breaker chamber door to open and disconnecting the control power plug, Means for removing the circuit breaker drive fixing screw to enable removal of the circuit breaker, and means for preventing the circuit breaker from being carried into the board when the main circuit contact of the discharged circuit breaker is closed. Means for enabling the circuit breaker to be carried into the board when the main circuit contact of the discharged circuit breaker is open, and the circuit breaker chamber door when the control power plug is disconnected. Means that cannot be closed, means for preventing movement of the circuit breaker to the connection position when the ground switch is closed, and the control power plug is connected when the ground switch is open. And when the door is closed, breaker connection A switchgear comprising an interlock mechanism comprising means for enabling movement to a position. 2. The switch gear according to claim 1, wherein shutters for controlling opening and closing of the handle are provided in an insertion opening of the switch gear moving operation handle and a handle insertion opening for operating the ground switch. 3. The switchgear according to claim 1, wherein the interlock mechanism and the operation panel are configured and arranged on a front surface of the switchgear as a fixed panel.