JPH0632732Y2 - Control center unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a unit of a control center, and more particularly to a fixing structure of the unit.

<Prior Art> FIGS. 3 to 10 show conventional examples.

Fig. 3 is a single line connection diagram, Fig. 3 (a) shows an example of direct insertion type, and Fig. 3 (b) shows an example of star-delta type. In Figure (a), (3) is the busbar, (11)
Is the movable side of the power supply side automatic connection type disconnector, (12) is a circuit breaker for wiring (hereinafter referred to as MCB), (13) is an electromagnetic contactor (hereinafter referred to as MC), and (14) is a thermal relay (hereinafter referred to as TH , (15) is a current transformer (hereinafter referred to as CT), (16) is a zero-phase current transformer (hereinafter ZCT).
, (17a) is the movable side of the load side automatic connection type disconnector,
(17b) is the fixed side, and (18) is the terminal block. Further, in FIG. 2 (b), (3) is a bus bar, (21) is a movable side of the power source side automatic connection type disconnecting section, (22) is MCB, (23) is MC, (24) is TH, and (25) is CT,
(26) is ZCT, (271) and (272) is MC, (28a) and (28c) are fixed sides of the load side automatic connection type disconnector, (28b) and (28d) are the fixed sides, (291) And (292) are terminal blocks. And (a)
Each unit from the movable side (11) of the power supply side automatic connection type disconnector to the movable side (17a) of the load side automatic connection type disconnector in the figure is connected by electric wires and attached to the case, and the unit (1) The movable side of the power supply side automatic connection type disconnecting section (21) from the movable side of the load side automatic connection type disconnecting section
The units (28a) and (28c) are connected by electric wires and attached to the case to form a unit (2). These units (1) and (2) are attached to the control center (1) as shown in the external perspective view of the control center in FIG.
They are stacked inside the c) and stored, and the terminal block (18)
(291) and (292) are stored together in the lower terminal block room (4).

Next, the structure will be described by taking the star-delta unit (2) as an example. Fig. 5 is a plan sectional view of the control center (1c), Fig. 6 is a front view of the interior without the unit (2), and Fig. 7 is an external perspective view of the unit (2) viewed from the rear side. It is a figure. As shown in FIG. 5 and FIG. 6, a floor board for partitioning the unit (5) of the control center (1c) into a plurality of stages in the vertical direction and supporting each unit.
(51) is provided, and each unit is mounted on the floor plate (51) so as to be freely drawn out. The busbars (3) are provided in parallel in the width direction of the board on the rear left side in the board, and are supported by an insulating cleat (not shown) and fixed to the box body (5). Also,
The fixed sides (28b) and (28d) of the load side automatic connection type disconnector are vertically arranged side by side near the rear right side of the panel and are fixed to the box (5). On the other hand, on the rear side of the unit (2), at the position corresponding to the above-mentioned bus bar (3) and the fixed side (28b) and (28d) of the load side automatic connection type disconnection section, the movable side of the power supply side automatic connection type disconnection section. (21) and the movable side (28a) and (28c) of the load side automatic connection type disconnector are provided, and when the unit (2) is inserted, the power source side is connected to the busbar (3) as shown in FIG. The movable side (21) of the automatic connection type disconnector is inserted and the fixed side (28b) and (28d) of the load side automatic connection type disconnector is inserted into the movable side (28a) and (28c) respectively. Are connected.

Next, a method of inserting the unit (2) will be described.
Fig. 8 (a) shows the disconnection state of the unit (2).
Is an insertion guide device for the unit (2). FIG. 9 is a perspective view of the insertion guide device (6), and FIG. 10 is a detailed view thereof. In Fig. 10 (a), (61) is a bolt unit (2).
It is rotatably inserted through a support plate (62) having a shape fixed to the case (20). (63) is Natsu. (64) is the floorboard
A female screw (65) is provided at a position corresponding to the bolt (61) on the receiving piece erected on the (51). And Fig. 10 (a)
From the disconnected state of, push it to the back side of the board (right side toward the drawing),
When the bolt (61) contacts the female screw (65) of the receiving piece (64) and the bolt (61) is rotated clockwise, the unit (2) moves toward the inner side of the board. FIG. 10 (b) shows a connected state in which the insertion is completed. The bottom of the case (20) of the unit (2) has the 9th
As shown in the figure, a notch (A) is provided in the moving direction.

<Problems to be solved by the invention> By the way, the unit of the control center is required to be as light as possible from the viewpoint of handling, so the unit (2) case (20) should be as light as possible. A relatively thin steel plate is used for the purpose. However, the case
By reducing the weight of (20), as described above, the bolt
Inserting the unit (2) while screwing the (61) into the female screw (65), the movable side (21) of the disconnector provided at the bottom
・ (28c) is normally fitted to the busbar (3) and the fixed side (28d) of the disconnection part, but the movable side (28a) of the disconnection part provided in the upper part is connected to the fixed side (28b). The insertion force cannot be resisted, and the eighth
As shown in FIG. (B), the case (20) is curved and cannot be fitted properly. Even if the upper part of the case (20) is pushed by hand and the disconnecting parts (28a) and (28b) of the upper part are normally inserted,
The disconnection parts (28a) and (28b) may come off due to the vibration due to the operation of the equipment in the unit thereafter, and as a result, the disconnection parts will be overheated due to poor contact, resulting in an accident. There is a problem.

<Means for Solving Problems> The present invention has been made in view of the above problems, and in a unit which is equipped with an automatic connection type disconnecting portion in a main circuit and is retractably housed in a control center. A pair of mounting plates, one end of which is fixed to the case and whose length in the front-rear direction is adjustable, at a position on the upper front side of the case of the unit, and a rotatable handle attached to the other end of the mounting plate; A fixing device comprising a handle and a lever that rotates integrally with the handle is provided, and the lever is locked to the box body by the rotation of the handle only at the connecting position of the unit, and the unit is fixed. Is.

<Operation> With the above configuration, the unit can be fixed to the box body in a state where the disconnecting portion is normally inserted, and when the disconnecting portion is disengaged due to vibration, it never happens.

<Embodiment> An embodiment of the present invention will be described with reference to FIGS. The same reference numerals as those in the conventional example shown in FIGS. 3 to 10 indicate the same parts. The difference from the conventional example is that a fixing device (7) for fixing the unit (2) to the box body (5) is provided on the upper front surface of the unit (2), and other than that is the same as the conventional example. .

FIG. 1 is an external perspective view of the unit (2) viewed from the front side, and FIG. 2 is a detailed view of the fixing device (7). Second
As shown in the figure, an L-shaped mounting plate A (71) is fixed to the case (20) of the unit (2) by a bolt (75), and the mounting plate B (71) is mounted on the horizontal surface of the mounting plate A (71). 72) are piled up and fastened together by bolts (76) and nuts (77). The bolt insertion holes (78) provided in the mounting plate A (71) and the mounting plate B (72) have a slight margin in the front-rear direction with respect to the diameter of the bolt (76). It is possible to move horizontally in the front-back direction by the amount of the margin. A handle (74) is attached to a vertical surface of the mounting plate B (72), and a lever (73) is integrally provided on a main shaft (741) of the handle (74) to integrally rotate with the handle (74). The lever (73) rotates. This handle (74) can be rotated 90 ° and the lever
The stopper (73) is provided so as to be rotatable between the vertical state shown in FIG. 1 and the horizontal state in which the vertical state is rotated 90 ° clockwise. Then, the position of the lever (73) is determined by adjusting the mounting plate B (72) back and forth in accordance with the distance S between the front surface of the unit case (20) and the folded end of the box body (5).

Then, after inserting the unit (2) as described in the conventional example, the upper part of the case (20) is pushed by hand so that the disconnecting part movable side (28a) of the upper part is normally attached to the fixed side (28b). After inserting and inserting the handle, the handle (74) is rotated clockwise to lock the lever (73) to the folded end of the box (5) to fix the unit.

Although the above embodiment has described the case of the star-delta type, the same operation can be performed even in the case of a direct-insertion type or another circuit type (for example, a reversible type) if the disconnecting portion is provided above for some reason. Of course you can.

<Effects of the Invention> With the above-described configuration, the weight of the unit can be maintained, and the disconnection portion does not come off even when vibration is caused by the operation of the equipment in the unit. Therefore, since the disconnecting portion always maintains the normal connection state, it is effective when there is no concern about an accident due to poor contact.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is an external perspective view of the unit as viewed from the front side, and FIG. 2 is a detailed view of a fixing device. 3 to 10 are conventional examples, FIG. 3 (a) is a direct-insertion type single line connection diagram, FIG. 3 (b) is a star-delta type single line connection diagram, and FIG.
Figure is an external perspective view of the control center. Figure 5 is a plan sectional view of the control center. Figure 6 is an internal front view with the unit removed. Figure 7 is an external perspective view of the unit from the rear side. Fig. 8, Fig. 8 (a) is a diagram showing a disconnection state of the unit, Fig. 8 (b) is a diagram showing an incomplete connection state of the unit, Fig. 9 is a perspective view of a portion of the insertion guide device, and Fig. 10
Figure (a) is a detailed view of the insertion guide device in the disconnected state, Figure 10 (b)
Shows a detailed view of the insertion guide device in a connected state. 2 ... Unit, 5 ... Box 7 ... Fixing device

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H02B 1/10 A

Claims (1)

[Scope of utility model registration request] 1. A unit in which a main circuit has a disconnecting section of an automatic connection type and which is housed in a control center so as to be freely drawn out. One end of the unit is fixed to the upper front side of the case of the unit. A fixing device including a pair of mounting plates whose length in the front-rear direction can be adjusted, a rotatable handle attached to the other end of the mounting plate, and a lever that rotates integrally with the handle is provided, and the unit is connected. A unit of a control center, wherein the lever is locked to a box body and the unit is fixed only by rotating the handle at a position.