JPH1146412A - Switchboard with bursting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the side plates of neighboring switchboards from being deformed even if an internal pressure rises, by bending outward substantially in U shape the both ends of the side plates of a switchboard so as to make them contacted each neighboring board. SOLUTION: The outside circumference of the box of a switchboard is made up of a door unit 12 fastened with a hinge 71, a back side plate 15, a bottom plate 14, a top plate and two side plates 1 having fabricated ends 1t. The ends 1t, bent and formed in a U shape, prevents a neighboring switchboard from coming closer to the switchboard exceeding a dotted line S shown in Figure when a plurality of switchboards are placed in a row with the ends 1t contacting each other. If a failure occurs in relation to the occurrence of an arc inside a box this condition, pressure rises inside the board. When it exceeds preset operating pressure of an internal bursting device, the bursting device is operated and the pressure rise inside the switchboard deforms the side plates 1 up to dotted line 1h as shown in Figure. However, the deformation does not reach the line S, thereby avoiding the deformation on side plates of the neighboring boards.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a switchboard with a pressure relief device for releasing the internal pressure that increases when a failure occurs to the outside.

[0002]

2. Description of the Related Art A conventional switchboard with a pressure relief device that discharges internal pressure that rises in the event of failure to the outside has reinforced other materials inside by welding or the like in order to prevent deformation of side plates due to internal pressure rise. .

[0003]

In the above-described example, the effect of reducing the deformation of the side plate due to the rising internal pressure has been produced. However, this deformation deforms the side plate of the adjacent switchboard and fixes the equipment. In some cases, the function and the mechanism of the protein were inhibited. An object of the present invention is to provide a structure that does not deform the side plate of an adjacent switchboard even if the internal pressure generated in the switchboard with a pressure relief device increases in the event of a failure.

[0004]

According to the present invention, there is provided a switchboard with a pressure-releasing device for releasing the internal rising pressure generated by a fault current to the outside at the time of a fault. The bent side of the substantially U-shaped side plate is assembled outside and is brought into contact with an adjacent board.

[0005]

FIG. 1 shows a basic embodiment of the present invention and is a plan sectional view of a central portion of a box of a switchboard. The outer periphery of the box of the switchboard is composed of a door 12, a rear plate 15, a bottom plate 14, a ceiling plate (not shown), and two side plates 1 with end portions 1t, which are joined by a hinge 71. The end 1t of the side plate 1 is bent and formed in a U-shape.
When a plurality of switchboards are arranged in a row, an adjacent switchboard (not shown) is brought into contact with the end 1t so that the switchboard can be approached only to S. In this state, the inside of the switchboard is deformed to 1h by the pressure increase described later, but does not reach S, so that the side face of the adjacent switchboard is not deformed. Although the U-shaped end 1t is drawn at the front and rear ends, it may be provided at the upper and lower ends in order to improve the strength of the side plate.

FIGS. 2 to 6 show a specific embodiment of the present invention. FIG. 2 shows the front of the switchboard 10. A door 12a with a handle 12h in the control room, a door 12b in the circuit breaker room in the center, and a door 12c in the cable room are hinged to the right side of the hinge 71, which is the center of rotation, from above. Through side plate 1a
It is provided in. FIG. 3 is a side sectional view showing the internal structure of the switchboard shown in FIG. The bold line indicates a partition 18 that partitions the inside of the switchboard into a plurality of chambers. The box of this switchboard
Partition wall 1 fixed to the inside of each divided side plate 1a and side plate 1b on both sides by bolts or the like (not shown)
8. Rear plate 1 fixed to the back side by bolts
5, the ceiling plate 13, which is fixed to the upper part by bolts,
A bottom plate 14 fixed to the bottom with bolts, and a control room door 12a, a breaker room door 12b,
It is constituted by a cable room door 12c. With these components, the inside of the box body of the switchboard is separated by a partition wall 18 into a bus room 22, a breaker room 23, a cable room 24, and a control room 21. Except for the control room 21 in which the low-pressure control circuit is housed, the ceiling plate 13 of the other room is to release pressure generated by an arc or the like generated at the time of an internal failure to the atmosphere. A pressure release device 23h and a cable chamber pressure release device 24h are provided. Three sets of buses 22a are provided inside the bus bar room 22, and are electrically connected to the disconnecting portion 22d at the upper part of the breaker room 23 by conductors. The breaker room 23 contains the breaker 2
3s is provided movably back and forth. Cable room 2
4 has a disconnecting portion 24d and a CT24 at the lower portion of the circuit breaker 23s.
a, a grounding switch 24e, and a lightning arrester 24r are provided, electrically connected to each other by a conductor, and a cable 24c is provided at an end thereof.
Is connected. The pressure relief device 23h of the circuit breaker chamber 23 releases the pressure increase due to the bus arc generated by the circuit breaker 23s that is moved by the fault current to the atmosphere, and at the same time, the pressure increase via the bus chamber pressure relief device 22h and the cable chamber pressure relief device 24h. To the atmosphere.

FIG. 4 is a right side view of the switchboard of FIG. The side plate provided with the doors 12a, 12b, and 12c described with reference to FIG. 2 includes a side plate 1a and a side plate 1b whose front and rear ends are bent in a substantially U-shape.
a and one end of the side plate 1b are firmly in contact with each other. Side plates 1a, 1b are bent ends 1t
Are provided so as to face outward, control circuit wiring holes 36 and busbar through holes 37 are provided in each of them, and control circuit wiring ducts 33 and 34 are provided on the inner surface.

FIG. 6 is a plan sectional view of a central portion of a box body in which the inside of the switchboard 10 of FIG. 2 is omitted, and adjacent boards 30 are indicated by dotted lines. As shown in FIG. 5, the power distribution panel 10 and the adjacent panel 30 are connected to each other with the bent end portions of their side plates in contact with each other, and are connected by a bolt 51 and a nut 55 via a connecting spacer 41 therebetween. ing. The difference between the embodiment shown in FIG. 1 and the embodiment shown in FIGS. 2 to 6 is that the side plate is constituted by a single member, whereas the embodiment is constituted by a plurality of divided side plates 1a and 1b. Only points. In such a switchboard according to the present invention, a failure involving an arc occurs in any of the bus bar room 22, the circuit breaker room 23, and the cable room 24, and the pressure in the panel increases, and this pressure is reduced to each room. When the preset operating pressure of the pressure-releasing device is exceeded, the pressure-releasing device operates to release the internal excessive pressure to the outside to reduce the internal pressure and prevent the switchboard from being damaged. In this process, since the pressure of each chamber in the switchboard rises to the operating pressure of the pressure relief device of each pressure chamber, this pressure causes the side plate to be in the embodiment shown in FIG.
In the embodiment shown in FIG. 6, the plates are deformed as indicated by dotted lines 1m and 1n. However, in the present invention, the adjacent plates are arranged so that the bent end portions of the side plates are in contact with each other. Therefore, even if the side plate is deformed as described above, it does not contact the side plate of the adjacent board. Thereby, deformation of the adjacent board is prevented.

When the maximum displacement of the deformation of the side plate is d, if the amount of bending k at the end of the side plate is selected to be k> d / 2, the deformation of the box due to an internal failure of the panel can be achieved. Even if the problem occurs, the influence on the adjacent board can be prevented.

[0010]

The present invention uses a bent end portion of a side of a switchboard as a gap material for keeping a space between adjacent switchboards, and does not apply pressure to the side of the adjacent switchboard to cause damage without causing any damage. It is possible to provide a switchboard with a pressure-reducing device having an inexpensive structure, since the above-mentioned reinforcement can be weakened or eliminated.

[Brief description of the drawings]

FIG. 1 is a principle diagram of an embodiment of the present invention.

FIG. 2 is a front view of the embodiment of the present invention.

FIG. 3 is a diagram showing the main internal configuration of FIG. 2;

FIG. 4 is a right side view of FIG. 2;

FIG. 5 is a partial example of a connection structure with an adjacent board as viewed from the Q direction in FIG. 4;

FIG. 6 is an explanatory diagram of a central section in which the inside of FIG. 2 is omitted.

[Explanation of symbols]

 Reference Signs List 1 side plate 1a side plate 1b side plate 10 switchboard 12 door 22 busbar room 22h pressure relief device 23 breaker room 23h pressure relief device 23s circuit breaker 24 cable room 24d disconnection part 24h pressure relief device 30 adjacent panel

Claims (1)

[Claims] 1. A switchboard with a pressure-releasing device for releasing an internal rising pressure generated by a fault current to the outside at the time of a fault, wherein a surface of the switchboard adjacent to another switchboard is bent at both ends to have a substantially U-shaped side plate. A switchboard with a pressure relief device, characterized in that the bent end of the switchboard is assembled outside and comes into contact with an adjacent board.