JPS6277006A - Integrated switchboard - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a collective type switchboard in which a large number of unit units are stacked and housed, and in particular to a collective type distribution board that allows easy inspection of the unit units. Regarding the board.

[Background of the invention]

In order to centrally control a large number of electric motors, a collective switchboard is used, in which the control devices are grouped into units, and a plurality of these units are stacked and stored all at once. The four-trapezoidal switchboard has multiple chambers formed by partition plates within the outer frame, and units can be freely inserted and removed into each of these chambers. In addition, when the collective type switchboards that have been put into practical use in recent years are inserted and stored,
Electrical connection between the busbar and the load side terminals is automatically made. Connection with the load side terminals can be made by means such as described in Japanese Patent Application Laid-Open No. 60-74906. be exposed.

By the way, inside the unit is a wiring breaker that receives power from the AC power supply. It houses electromagnetic contactors that control the operation and stop of IJ equipment, thermal relays that provide overcurrent protection, etc. In order to improve the reliability of an integrated switchboard, it is necessary to check whether the units, especially the electromagnetic contactors, operate normally. When inspecting the operating state, it is necessary to avoid driving the electric motor from the viewpoint of wasted power/)'I cost and safety.

Conventionally, in order to inspect a unit, the unit is pulled out to an inspection position, the mechanical contact between the unit and the power bus and the load side terminal is severed, and the electrical connection is made into a Wr path state. On the other hand, the operating circuit power for the electromagnetic contactor is obtained from the load side of the wiring breaker. Therefore, when the unit is pulled out to the inspection position, the operating circuit power of the electromagnetic contactor is lost. For this purpose, for example, as described in Japanese Unexamined Patent Publication No. 58-189709, an inspection power supply device is used, and a plug is used to supply power to the unit. Since the inspection is performed for each unit, the plug must be replaced every time one unit is inspected, which significantly reduces inspection efficiency. In addition, an inspection plug must be attached to each unit, which is one factor that complicates the unit configuration.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an integrated power distribution board that allows easy inspection of individual units and improves efficiency of inspection work.

[Summary of the invention]

The feature of the present invention is that when the unit is pulled out to the operation test position, the power contact and the vertical power bus are electrically connected, and the load side clip is attached to the load side clip and the vertical @source bus. The reason is that the terminal is electrically disconnected.

[Embodiments of the invention]

An embodiment of the present invention is shown in FIGS. 1-3.

FIG. 1 is a cross-sectional view of the unit inserted into the normal position. Note that the wiring processing room and equipment such as circuit breakers are omitted in the figure No. 1-1. Figure 2 is a partially cutaway front view with the door removed.

Figure 3 shows the first part partially broken with the side cover removed.
FIG. 3 is a right side view of the figure.

1 to 3, the inside of a housing 1 is divided into a unit storage chamber 3 and a wiring processing chamber 4 by a frame 2 arranged in the vertical direction of the panel. The wiring processing chamber 4 accommodates a 'fJi line of a control circuit with a low voltage level. At the front of the panel is a unit storage room; a 1° front door is provided. The wiring processing chamber 4 is also provided with a dedicated front door, but its illustration is omitted. The unit storage chamber 3 is partitioned by a partition 5 fixed between the casing 1 and the frame 2. A plurality of partition plates 5 are fixed along the vertical direction of the board according to the vertical dimension of the unit unit 6U, thereby forming a plurality of unit storage chambers 3. Each unit storage chamber 3 stores a unit 6U. The partition plate 5 is formed into a U-shape with an M-bottom cross section in the front-rear direction. As is clear from FIG. 3, the unit metal fitting 6 of the unit 6U is formed in a side-curved shape, and a metal edge is provided with an upright edge. Unit fittings 6
A wiring breaker 16 is attached to the vertical surface 6a by a mounting bracket (not shown). In addition to the circuit breaker 16, an electromagnetic contactor and a thermal relay can also be installed.
It is omitted for simplicity of illustration.

Further, a contact support stand 29 made of an insulating material and supporting the power contact 19 and the clip 28 is also attached to the vertical surface 6a. The contact support stand 29 is attached to the vertical surface 6a by screws 30Δ and 30B. Rails 7'A and 7B extending in the depth direction of the board are fixed to one and four second of the partition plates 5 at both lower corners of the unit storage chamber 3. Units]・Metal fittings 6
(Unit 6U) is inserted into and removed from unit storage chamber 3 by sliding on rails 7A and 7I3-H. A contact support stand 29 attached to the vertical surface of the unit fitting 6 has three power contacts 19 attached to its back surface. As shown in FIG. 8, the power contact 19 has two elastically deformable contact pieces 19a and 1.9b, and is configured in the shape of an arrow, and has a semicircular handling spring 20a inside the arrow part. 20b is in contact with it. When the power contact 19 is inserted into the vertical bus bar 13, a surface contact piece 19a is formed.

19b comes to be pressed between the U-shaped flanges 13a and 13b of the vertical generatrix 13. On the fixed side of the power contact 19 to the support base 29, contact pieces 19a and 19b are overlapped, and a crimp terminal 18 is attached to the overlapped portion. An electric wire 3 is connected between the crimp terminal 18 and the power supply side terminal of the circuit breaker 16.
2 is electrically connected. On the other hand, the contact support base 2
The clip 28 is provided with three square grooves 40 on the back side of the clip 9 and is pressed into each square groove 40 by a spring 31.
is provided. The clip 28 holds a load-side blade 22, which will be described later, on the rear side, and a contact 41 attached to one end of the electric wire 33 on the front side. "rIf," the wire end 3 of the wire 33 is connected to the load side terminal of the wiring breaker 16.

On the other hand, behind the unit storage chamber 3, three vertical busbars 13 are respectively surrounded and supported by insulating cases 12 in the vertical direction of the board. The insulating case 12 is made of a transparent insulating material, and has many receiving holes 12a (shown in FIG. 7) for receiving the source contacts 19 in the vertical direction (longitudinal direction) thereof. As shown in FIG. 7, the vertical generatrix 13 is made of a conductive material and shaped like a gutter, and has flanges 13a and 13b bent into a U-shape with the tips facing outward at both ends of the open legs. ing. In addition, an eighth
As shown in the figure, a large number of receiving holes 14 for receiving the tips of the power contacts 19 are vertically bored. Vertical bus bar 13
(including the insulating case 12) is held between the bus bar supports 23 so that the phases are parallel to each other. The 1st wire support stand 23 is made up of two molded rectangular members 23.
It is composed of A and 23B. Member 23A, 2313
are provided with three grooves extending through the width direction at opposing positions. When the members 23A and 23B are overlapped as shown in FIG. 4, these grooves form a square hole through which the vertical bus bar 13 passes.6 A terminal fitting 27 for drawing out the load is formed on the back side of the member 23A.
is provided. The terminal fitting 27 is connected to the load side cable 11
The load side blade 22 is fixed with screws. One end of the load side play 1/22 is screwed and fixed to the terminal fitting 27, and the other end protrudes through the members 23A and 23B.

The blade 22 is elastically attached to the members 23A and 23B using split pins or the like. Member 23A.

23B are closely stacked and frame 24A.

24B with a screw 25. Frame 24A
, 24B are provided in contact with the housing 1 in the vertical direction of the board. The load-side blade 22 completely holds the unit fitting 6] and is held in the clip 28 when stored in the storage chamber 3.

Now, in the bottom surface 6b of the unit metal fitting 6, three locking holes 50, 51 and 52 are bored at predetermined intervals along the depth direction of the unit for regulating the unit insertion position. Also,
As shown in FIGS. 9 and 10(a), a lock button switch 54 is fixed to the partition plate 5 by screws 55, and a movable button 54A of the button switch 54 protrudes from the locking holes 50 to 52. Then, insertion and removal of the unit 6 is restricted.

Once the movable button 54A is depressed, the lock button switch 54 is mechanically held in the position shown in FIG. 8 (G). When in this holding state, if the unit metal fitting 6 is pressed as shown in FIG. 10(c), the mechanical holding is released and the unit is lifted up by a spring force (not shown). When the unit 6 is completely stored in the unit storage chamber 3, the movable button 54A of the lock button switch 54 protrudes from the locking hole 50 as shown in FIGS. 1 and 10(a).

In this configuration, when the unit 6U is completely stored in the unit storage chamber 3, as shown in FIG.
9 is inserted into the vertical bus bar 13, and its tip is inserted into the receiving hole 14.
A surface contact piece 19a passes through the surface.

19b is pressed between the U-shaped flanges 13a and 13b.

Therefore, the power supply side terminal of the wiring breaker 16 is electrically connected to the vertical bus bar 13. Further, in this state, the clip 28 is in contact with the load-side blade 22 by sandwiching it therebetween. Vertical bus bar 13, power contact 19 and clip 2
8 and the load-side play 1 22 are as shown in FIG. When the state of the blade 22 is as shown in FIG. 4, the movable button 54A of the lock button switch 54 is in the normal position P+ as shown in FIG. 10(a).
It protrudes from the locking hole 50 shown in FIG.

To inspect the unit 6U when the lock button switch 54 is located at the locking hole 50 indicating the normal position P1, first disconnect the wiring by operating means (not shown) attached to the door 10. The device 16 is tripped. In the collective type switchboard, the door 10 can be opened and closed by tripping the circuit breaker 16. When the door 10 is open, the movable button 5 of the lock button switch 54 is pressed.
When an inspector presses 4Δ, a state as shown in FIG. 10(b) is created. Next, when the metal fitting 6 is pulled out to the front of the unit 1, the bottom surface 9b of the unit metal fitting 6 hits the inclined surface of the movable button 54A, and when the unit metal fitting 6 is further pulled out to the front, the movable button 5
4Δ is further pushed downward from the position shown in FIG. 10(b), and becomes as shown in FIG. 10(c). When the units 1 to 11 and 6 are further pulled out to the front from the state shown in FIG. 10(c), the movable button 54A protrudes from the locking hole 51 at the 1'J+operation test position P2.

Unit metal fittings 6 are possible! IJ button 54A is in locking hole 5
Movement is prevented by protruding from 1. Now,
When the unit metal fitting 6 is pulled out to the operation test position P2 where the movable button 54A protrudes from the locking hole 51, it becomes as shown in FIG. That is, the vertical busbar 13 and the power contact 19 are in contact, but the clip 28 and the blade 22 are in a separated state. In this way, when the unit 6U is pulled out to the operation test position P2, the vertical motherboard MA13 and the power contact 19
is in the contact form and can secure the operating circuit power of the electromagnetic contactor (not shown). In this state, an operation test of the electromagnetic contactor is performed. The operation test of the magnetic contactor is performed including the condition circuit that provides the switching conditions to the magnetic contactor.

Set unit 6U to operation test position P2 and electromagnetic contact 8! :
After the + operation test is completed, lock button switch 5
When the unit metal fitting 6 is pulled out after pressing the movable button 54A of No. 4, the movable button 54A comes to protrude from the locking hole 52. At this time, the vertical bus bar 13 and the power contact 19
The state of the clip 28 and play 1 22 is as shown in FIG. The unit 6U stops at point position Pj P s. The unit 6U is set at the inspection position Pδ and a mechanical inspection such as the contact state of the contacts is performed. If there is no abnormality in mechanical inspection, move the movable button 54 of the lock button switch 54.
After pressing A, the unit fitting 6 is inserted into the unit storage chamber 3, brought to the normal position Pl, and the door 1o is closed to complete the inspection.

The unit is inspected as described in (1) below, with the vertical Iu wire (power bus) 13 and power contact 19 in contact, and the clip 28 and blade 22 on the load side separated. (Driving test form Jp) is created, and the operation test of the electromagnetic contactor is conducted under this driving test condition. To inspect the unit, simply pull it out to the front.
The inspection work efficiency can be improved since it can be carried out easily.

Next, in the embodiment described in 1-1, the vertical generatrix 1 has a gutter-like cross section, but the same method can be applied even if the vertical generatrix 1 has a flat plate-like shape.

FIG. 11 shows the state of contact with the power contact 61 when the vertical bus bar 60 is flat. FIG. 11(a) shows the unit 6U in the normal position, and FIGS. 11(b) and 11(c) show the unit 6U in the operation test position and the inspection position.

〔Effect of the invention〕

As explained below, according to the present invention, the operation of the magnetic contactor can be inspected by simply pulling out the unit to the operation test position, so inspection can be easily carried out and inspection work efficiency can be greatly improved. .

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing one embodiment of the present invention, Fig. 2 is a partially cutaway front view with the door removed, and Fig. 3 is a partially cutaway front view with the side cover removed. Right side view of the figure,
Figures 4 to 6 are detailed configuration diagrams of main parts showing the contact status of the power bus, the power contact, and the clip and play on the load side;
Fig. 7 is a perspective view showing the detailed configuration of the main parts with the unit pulled out, Fig. 8 is a diagram showing the state of the power supply bus and the fIi source contact, and Fig. 9 is a perspective view showing an example of the unit I position regulating means. FIG. 10 is a diagram illustrating the unit position and the state of the position regulating means, and FIG. 11 is a diagram illustrating the contact state of the power bus and the power contact in another example. 6...Unit metal fittings, 3.Unit storage room, 13.
...Vertical bus bar, 19...Power contact, 22...Load side blade, 28...Clip, Pt...Normal position, P
2...Operation test position, P8...Inspection position.

Claims (1)

[Claims] 1. A plurality of unit storage chambers partitioned by partition plates along the vertical direction of the panel, vertical power supply busbars arranged in a row in the vertical direction of the panel at the back of these unit storage chambers, and the vertical A bus bar support stand made of insulating material that supports the power bus bar; a load side terminal that is attached to the bus bar support stand and has a load side blade that protrudes toward the front of the panel; a power contact that is attached to protrude and comes into contact with the vertical power bus bar when the unit metal fitting is stored in the unit storage chamber; and a power contact that is attached to the unit metal fitting and comes into contact with the vertical power bus bar when the unit metal fitting is stored in the unit storage chamber; a clip that holds the load-side blade; and a blocking means that prevents insertion and removal of the unit metal fitting when the unit metal fitting is pulled out to the operation test position, and when the unit metal fitting is pulled out to the operation test position, the power supply A collective type switchboard characterized in that the contactor and the vertical power supply bus bar are electrically connected, and the clip and the load-side terminal are electrically disconnected.