CN101647165A

CN101647165A - Switchgear with metal enclosure

Info

Publication number: CN101647165A
Application number: CN200780052647A
Authority: CN
Inventors: 千轮俊一郎
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2007-04-26
Filing date: 2007-04-26
Publication date: 2010-02-10
Anticipated expiration: 2027-04-26
Also published as: CN101647165B; HK1139791A1; KR101079984B1; WO2008136112A1; JPWO2008136112A1; JP4988833B2; KR20100004973A

Abstract

A switchgear with metal enclosure in which a box (1) has contained therein multiple breakers (8a, 8b), a horizontal bus (11) connected to any one contact of the breakers (8a, 8b) via a branch conductor (12), a cable (15) connected to another contact of the breakers (8a, 8b), and a controller. The multiple breakers (8a, 8b) are placed in front of the box (1) in parallel with the earth side by sidewith each other when viewed in front elevation. Both the horizontal bus (11) and the branch conductor (12) are at the upside back of the breakers (8a, 8b) while the cable (15) is at the downside backof the breakers (8a, 8b).

Description

Metal closed type switch gear

Technical field

The present invention relates to a kind of metal closed type switch gear that in dish, accommodates a plurality of circuit breakers.

Background technology

Metal closed type switch gear is to be used for holding circuit breaker etc. in dish, to carry out the distribution board of distribution safely.Hold many circuit breakers for the one side of distribution board under the more situation.And, in the metal closed type switch gear,, require to utilize dividing plate to separate each chamber such as bus-bar room, breaker chamber, cable vault in order to improve fail safe.In addition, if dish inner because of estimate less than short circuit accident produce electric arc, then, may bring injury to the human body that coils periphery because internal pressure can sharply rise, therefore as its countermeasure, require to have the structure that makes the internal pressure safety relief.

Accommodate the existing metal closed type switch gear of a plurality of circuit breakers as dividing distribution board inside, for example disclose following metal closed type switch gear is arranged, promptly, just the control room is set at the rear of positive door, at its rear, configuration is the two-layer breaker chamber that accommodates circuit breaker up and down, rear at breaker chamber, setting accommodates the bus-bar room of the main bus bar that is connected with a side terminal of each circuit breaker by the shunt conductor, further also dispose the cable vault's (for example, with reference to patent documentation 1) that accommodates the cable that is connected with the opposite side terminal of circuit breaker at its rear.

In addition, as holding a plurality of circuit breakers and comprising the metal closed type switch gear of pressure relief plate, for example disclose following metal closed type switch gear is arranged, promptly, the inside of casing is divided into a plurality of breaker chambers, control appliance chamber, common pressure releasing chamber, current transformer chamber, bus-bar room, vertical bus-bar room and cable vault etc., and the top of common pressure releasing chamber therein and cable vault and top breaker chamber is provided with pressure relief plate.Adopt following structure, promptly, when in cable vault or top breaker chamber, having an accident, the pressure relief plate at the top of these chambers is open, pressure due to the electric arc that does not directly have the bottom breaker chamber of pressure relief plate and vertically produce in the bus-bar room, then discharge (for example, with reference to patent documentation 2) towards the top of casing by common pressure releasing chamber.

Patent documentation 1: the Japan Patent spy opens 2000-333314 communique (the 4th page, Fig. 1)

Patent documentation 2: Japanese patent laid-open 10-322811 communique (the 4th page, Fig. 1～Fig. 2)

In the metal closed type switch gear shown in the patent documentation 1, because circuit breaker is vertically stacked, therefore the space that is difficult to guarantee to hold control appliance above circuit breaker becomes the structure that the positive door of control appliance utilization is installed.Therefore, the circuit breaker sky is opened the rear that preset distance is configured in positive door, makes and does not disturb the control appliance that is installed on the door, further in its rear configuration bus-bar room and cable vault, the larger-size problem of the depth of existence dish.

There are the following problems for metal closed type switch gear shown in the patent documentation 2, promptly, even up and down under the situation of multi-layer configuration, also can make the pressure that produces in each chamber structure of pressure release respectively though adopt at circuit breaker, but need common pressure releasing chamber thus in addition, therefore the volume of distribution board increases, and causes distribution board to maximize.In addition, there are the following problems, that is, if vertical stacked circuit breaker, then the separation between each chamber becomes complicated, and it is complicated that the pressure release path also becomes, and is difficult to make inner pressure pressure release efficiently of rising.

Summary of the invention

The present invention finishes in order to address the above problem, and its purpose is by trying every possible means in the configuration of circuit breaker, thereby dwindles the size of depth direction.In addition, its purpose is to make the separation of each chamber to simplify.The metal closed type switch gear of the structure of the pressure pressure release of rising in the inside when further, its purpose is to be made short circuit accident easily.

Metal closed type switch gear involved in the present invention, be in casing, accommodate a plurality of circuit breakers, the distolateral horizontal bus that is connected by conductor along separate routes and circuit breaker, with another distolateral cable that is connected of circuit breaker, reach control appliance, in alignment arrangements on the direction parallel and on the direction about the face side from described casing is seen as a plurality of circuit breakers are arranged with the earth.

According to metal closed type switch gear of the present invention, because at a plurality of circuit breakers of alignment arrangements on the direction parallel and on the direction about the face side from casing is seen as with the earth, therefore can be near the positive door configuration circuit breaker of casing, in addition owing to can in the space that forms up and down, dispose control appliance or parts group, and the configuration structure that adopts can make circuit breaker and bus and circuit breaker and cable ease of connection, therefore can dwindle the size of the depth direction of distribution board.

Description of drawings

Fig. 1 is the front view of the metal closed type switch gear in the embodiments of the present invention 1.

Fig. 2 is the side sectional view of Fig. 1.

Fig. 3 is the rearview that the III-III from Fig. 2 sees.

Fig. 4 is the side sectional view metal closed type switch gear of explanation in the embodiments of the present invention 2, the pressure release path when having an accident in the breaker chamber.

Fig. 5 is the side sectional view metal closed type switch gear of explanation in the embodiments of the present invention 2, the pressure release path when having an accident in the cable vault.

Embodiment

Execution mode 1.

Below, specify metal closed type switch gear of the present invention based on accompanying drawing.

At first, according to Fig. 1～Fig. 3, the overall structure of metal closed type switch gear is described.The integral body of metal closed type switch gear is covered by metal casing 1, face side as shown in Figure 1, the upper and lower be respectively equipped with utilize that hinge can open and close, control room's door 2 and about two

breaker chamber door

3a, 3b of arrangement.Be provided with the ventilation window 4 of ventilation usefulness in the lower side of

breaker chamber door

3a, 3b.

The inside of casing 1 is divided into a plurality of chambers, above the inboard of right side breaker chamber door 3a, dispose breaker chamber 5a, similarly also dispose breaker chamber 5b above the inboard of left side breaker chamber door 3b, the whole below of two

breaker chamber

5a, 5b is for connecting work-room 6.In addition, the whole inboard of control room's door 2 is control room 7, accommodates control appliances such as instrument cluster, relay.

Accommodate circuit breaker 8a in the inside of breaker chamber 5a, accommodate circuit breaker 8b in the inside of breaker chamber 5b in addition, under the situation that is draw-out type breaker, can pull out towards the front.In each rear side of

circuit breaker

8a, 8b, open predetermined space and draw the circuit breaker terminal (not shown) that is connected with the movable lateral electrode and the fixed side electrode of breaker body empty up and down.

Shown in the end view of Fig. 2, at the rear wall of

breaker chamber

5a, 5b, dispose the sub-9a of upper linker and the bottom splicing ear 9b that are connected with above-mentioned circuit breaker terminal, make and wall insulation and perforation wall.

The space of the rear side of

breaker chamber

5a, 5b is divided into two between sub-9a of upper linker and bottom splicing ear 9b, the space of top is a bus-bar room 10, in bus-bar room 10, dispose three-phase horizontal bus 11 up, and by casing 1 insulation supporter, and, accommodate the shunt conductor 12 that connects horizontal bus 11 and the sub-9a of upper linker, and supported by casing 1 by support insulator 13.In addition, on the top board of the casing 1 on the top of this bus-bar room 10, be provided with ventilation tower 14.

On the other hand, the space of below is the 16a of each cable vault, the 16b (with reference to Fig. 3) that holds the cable 15 of the load-side that is connected respectively with circuit breaker 8a, 8b.Cable 15 is connected with bottom splicing ear 9b by bonding conductor 17, the perforation midway of bonding conductor 17 be provided with current transformer 18.

As mentioned above, be divided into a plurality of chambers in the casing 1 to improve fail safe, each chamber is separated by dividing plate 19～26 as shown in Figures 2 and 3, constitutes independently chamber.The unit that divides is different according to standard or specification.Basically, breaker chamber, bus-bar room, cable vault, control room are separated, be divided into independently chamber.Having under the situation of a plurality of circuit breakers, each circuit breaker is being formed breaker chamber.There are two kinds of situations in connected each cable, and a kind of situation is to be that unit divides as shown in the figure with the circuit breaker, and another kind of situation is all cables to be concentrated form the cable vault.In addition, bus-bar room be cable concentrate for well.

In addition, among the figure, illustrate bus-bar room 10 be configured in the top and the 16a of cable vault, 16b be configured in the below situation, but also exist bus-bar room 10 be configured in the below and the 16a of cable vault, 16b be configured in the top situation.

Of the present invention first is characterised in that, in alignment arrangements on the direction parallel with the earth and on the direction about the face side from casing is seen as a plurality of circuit breakers (being two

circuit breaker

8a, 8b the present embodiment) is arranged.(configuration with this circuit breaker abbreviates as laterally and row arrangement in the following description.)

So, the following describes its effect.

Metal closed type switch gear is normally transversely arranged to be provided with that the multiaspect distribution board uses.The height of these distribution boards is to be predetermined height according to decisions such as the place and environment that is provided with, specification, standards, and is unified into sustained height.

In the height that is determined, if shown in patent documentation illustrated in the background technology item 1, at a plurality of circuit breakers of above-below direction laminated configuration, then be difficult to control room and circuit breaker are configured in one side, will adopt following structure, promptly, just the control room is set at the rear of positive door, the breaker chamber of side configuration within it, further side disposes bus-bar room, cable vault within it, thus the size of depth direction is bigger.

Different therewith is that by the horizontal and row arrangement with

circuit breaker

8a, 8b, the space that can will be formed at

circuit breaker

8a, 8b top is used as control room 7, therefore,

circuit breaker

8a, 8b can be configured in fully close positive circuit breaker door 3a, the place ahead of 3b.Among Fig. 2, express following situation for example, promptly, the position relative with

circuit breaker

8a, 8b at

circuit breaker door

3a, 3b is provided with open pore,

circuit breaker

8a, 8b are arranged on fully near the place ahead of

breaker chamber

5a, 5b, make that the operating surface board in the front of the surface, state Xiamen of

shutdown device door

3a, 3b and

circuit breaker

8a, 8b becomes substantially with one side.Part shown in the chain-dotted line is an over cap 25.

In addition, by horizontal and row arrangement with

circuit breaker

8a, 8b, thereby bus-bar room 10 at

breaker chamber

5a, 5b rear, the sub-9a of upper linker can be configured as a horizontal row, therefore as shown in Figure 3, the sub-9a of upper linker and be configured in connection between the horizontal bus 11 of top can connect with simple conductor path, and conductor 12 intricatelys are intersected.

Similarly, owing to bottom splicing ear 9a can be configured as a horizontal row, therefore can connect cable 15 and the bottom splicing ear 9a that erects from ground simply by bonding conductor 17 at the 16a of cable vault, 16b.

Like this, can simplify the bus bar configuration and the cable configurations that comprise the shunt conductor, and above-mentioned circuit breaker can be configured in face side, thereby can dwindle the size of depth direction greatly.

Even under the situation that circuit breaker platform number increases,

circuit breaker

8a, 8b and horizontal bus 11, and the syndeton of

circuit breaker

8a, 8b and cable as long as increase essentially identical structure in the horizontal, can not increase the size of depth direction yet.

In addition, under near situation about

circuit breaker

8a, 8b being configured in respect to the above-below direction of casing 1 central authorities, owing to can increase the length of the shunt conductor 12 that extends along the vertical direction, and can be configured in the bigger bus-bar room 10, therefore can expect the radiating effect on the shunt conductor 12.

In addition, under separating with the situation of dividing each chamber to casing 1 inner-use clapboard 19～26, because partition structure is simple, so the piece number of dividing plate is less, and simple shape is made easily and assembled.Even the platform number of circuit breaker increases, also as long as adding dividing plate between the circuit breaker that increases and between the cable corresponding with it, and basic structure is constant.

And the space that can will be formed at

circuit breaker

8a, 8b below is used as the connection work-room.In connecting work-room 6, be provided with the terminal board that control line that the outside with the control appliance of control room 7 and metal closed type switch gear is connected or power line carry out relaying.Thereby, connect work-room 6 since except terminal board housing apparatus not basically, thereby be left corresponding space.As shown in Figure 2, bus-bar room 10 is being configured in upside, the 16a of cable vault, 16b are being configured under the situation of downside, because just at the rear side that connects work-room 6, setting has cable 15, therefore if open

breaker chamber door

3a, 3b, unload the dividing plate 23 that connects work-room 6 back, then can be from the dish face side near cable 15.That is the cable connection operation that, can be when the dish face side is implemented fixedly or the maintenance inspection of cable.Therefore, owing to need not working space, thereby metal closed type switch gear fully can be provided with near the wall at rear, so can effectively utilize space in the house in the dish back.

In addition, under the situation of introducing control line above casing 1, terminal board for example is arranged in the control room 7, also can save the dividing plate 23 that connects between work-room 6 and the 16a of cable vault portion, the 16b so that whole chamber as the cable vault.

As mentioned above, invention according to present embodiment, metal closed type switch gear accommodates a plurality of circuit breakers in casing, by the distolateral horizontal bus that be connected of shunt conductor with circuit breaker, another distolateral cable that is connected with circuit breaker, and control appliance, wherein, because on the direction parallel with the earth, and a plurality of circuit breakers of alignment arrangements on the direction about the face side from casing is seen as, therefore can be near the positive door configuration circuit breaker of casing, in addition because can be the spatial configuration control appliance or the parts group that form up and down, and the configuration structure that adopts can make the ease of connection of circuit breaker and bus and circuit breaker and cable, therefore can dwindle the size of the depth direction of distribution board.

In addition, owing to the face side that circuit breaker is configured in box house,, control appliance is configured in the top of circuit breaker with horizontal bus and shunt conductor and the either party of cable configurations in the above-below direction at circuit breaker rear, therefore the size of the depth direction of casing can be dwindled, the space can be tried hard to save.

In addition, since with the internal separation of casing become to hold respectively each circuit breaker breaker chamber, hold horizontal bus and along separate routes conductor bus-bar room, be the control room that unit holds the cable vault of cable and holds control appliance in the one mode or with the cable that is connected with each circuit breaker, and each chamber is separated by dividing plate each other, therefore in casing, be divided into a plurality of chambers with under the situation that improves fail safe, the separation structure between each chamber can be simplified, the assembling operation number in man-hour of distribution board can be tried hard to reduce.

In addition, because bus-bar room and cable vault are configured to bus-bar room at upside, the cable vault is at downside, at the downside of breaker chamber the connection work-room is set, therefore can be from the face side of distribution board near cable, the cable connection operation that can be when the dish face side is implemented fixedly or the maintenance inspection of cable.Therefore, for example under metal closed type switch gear is arranged within doors situation, the working space of dish back can be fully need not to stay, the space in the house can be effectively utilized near the wall setting.

Execution mode 2.

Fig. 4 is the side sectional view of the metal closed type switch gear in the execution mode 2.Because the Fig. 1 that illustrates in front view and the execution mode 1 is identical, Fig. 2 of internal structure and execution mode 1 and shown in Figure 3 identical, so same section in addition illustrates and omits explanation with same label, and different parts only is described.

Among Fig. 4, on the dividing plate 22 between each

breaker chamber

5a, 5b and the bus-bar room 10, be respectively equipped with open pore, and be respectively equipped with pressure release, make and seal this open pore with door 27.In addition, on the dividing plate 24 between each 16a of cable vault, 16b and the bus-bar room 10, be respectively equipped with pressure release door 28 too.Pressure release is adopted following structure with

door

27,28, promptly, one end schedules on the dividing

plate

22,24 separately by hinges fixing, under common state, seal open pore, play effect as the part of each dividing

plate

22,24, if it is the arbitrary room pressure in

breaker chamber

5a, 5b or in the 16a of cable vault, the 16b sharply uprises, then open towards bus-bar room 10 sides.

Then explanation action.

If produce electric arc in dish inside because of the short circuit accident that can't estimate, then internal pressure sharply rises, and may bring injury to the human body that coils periphery.As its countermeasure, in the present embodiment, each

breaker chamber

5a, 5b and each 16a of cable vault, 16b are provided with

pressure release door

27,28 respectively.

Be illustrated in pressure release path when internal short-circuit accident etc. takes place in the breaker chamber 5a (or 5b) with arrow among Fig. 4.For example, under accident origination point 29 was short-circuited the situation of accident, because of electric arc makes the pressure in the breaker chamber 5a sharply rise, pressure release was open with door 27, pressure bus-bar room 10 pressure releases towards the rear.Thus, the internal pressure in the breaker chamber 5a reduces, and discharges towards the outside from the ventilation tower 14 on the top board that is arranged on casing 1 via the path shown in the arrow when pressure reduces towards the gas than the HTHP of large space pressure release of bus-bar room 10.

Fig. 5 is the figure that the pressure release path when in the 16a of cable vault (or 16b) the internal short-circuit accident taking place is described.

The accident if the position of for example accident origination point 30 in the 16a of cable vault is short-circuited, then make pressure sharply rise because of electric arc, pressure release is open with door 28, as shown by arrows, the gas of HTHP is discharged towards the outside from ventilation tower 14 via the path shown in the arrow when pressure reduces towards bus-bar room 10 pressure releases.

Like this, by make the internal pressure that in dish, produces from dish top towards outside pressure release, thereby guarantee to coil peripheral personnel's safety.

In the invention of present embodiment, because laterally and row

arrangement circuit breaker

8a, 8b, therefore only dividing

plate

22,24 is added open pores and pressure release with door, just can constitute the pressure release path simply.Even under the situation that the platform number of circuit breaker increases, also need not to add separately pipeline or dividing plate for this reason.

In addition, few and the spacious bus-bar room 10 of barrier that is connected owing to the top board with casing 1 that can will be formed on

breaker chamber

5a, 5b rear is used as the common pressure release path of

breaker chamber

5a, 5b and the 16a of cable vault, 16b, so can utilize bigger space to reduce pressure rapidly.

In addition, pressure release utilizes hinge to open and close, but is not limited thereto with door the 27, the 28th, for example also can adopt following structure, that is, make the strength reduction of the part of dividing

plate

27,28 in advance, when internal pressure rises, destroyed open thereby make it carry out plastic deformation.

In addition, above-mentioned in, illustrated two cable vaults are provided with the situation of pressure release with door respectively, but under the situation of common cable chamber, this chamber is provided with a pressure release gets final product with door.

As mentioned above, invention according to present embodiment, because the pressure release door that carries out pressure release when the internal pressure of each breaker chamber rises is being set on the dividing plate of dividing each breaker chamber and bus-bar room, and on the top board of the casing on the top of bus-bar room, the ventilation tower is set, when therefore in breaker chamber, being short-circuited accident, owing to reduce and pass through the ventilation tower towards outside pressure release in the bus-bar room internal pressure, therefore can guarantee the personnel's of distribution board periphery safety.

In addition, because on the dividing plate of dividing cable vault and bus-bar room, the pressure release door that carries out pressure release when the internal pressure of cable vault rises is set, and on the top board of the casing on the top of bus-bar room, the ventilation tower is set, when therefore in the cable vault, being short-circuited accident, owing to reduce and pass through the ventilation tower towards outside pressure release in the bus-bar room internal pressure, therefore can guarantee the personnel's of distribution board periphery safety.

Claims

1. metal closed type switch gear, in casing, accommodate a plurality of circuit breakers, the distolateral horizontal bus that is connected by conductor along separate routes and circuit breaker, with another distolateral cable that is connected of circuit breaker, reach control appliance, it is characterized in that,

Described a plurality of circuit breaker is in alignment arrangements on the direction parallel with the earth and on the direction about the face side from described casing is seen as.

2. metal closed type switch gear as claimed in claim 1 is characterized in that,

Described each circuit breaker is configured in the face side of the inside of described casing, described horizontal bus and described shunt conductor and the either party of described cable configurations in the above-below direction at the rear of described circuit breaker, described control appliance is configured in the top of described each circuit breaker.

3. metal closed type switch gear as claimed in claim 2 is characterized in that,

The inside of described casing is divided into the breaker chamber that holds described each circuit breaker respectively, the bus-bar room that holds described horizontal bus and described shunt conductor, be the control room that unit holds the cable vault of described cable and holds described control appliance in the one mode or with the cable that is connected with described each circuit breaker, described each chamber is separated by dividing plate each other.

4. metal closed type switch gear as claimed in claim 3 is characterized in that,

Described bus-bar room and described cable vault are configured to described bus-bar room at upside, and described cable vault is at downside, are provided with the connection work-room at the downside of described breaker chamber.

5. metal closed type switch gear as claimed in claim 4 is characterized in that,

On the dividing plate of dividing described each breaker chamber and described bus-bar room, be provided with the pressure release of when the internal pressure of described each breaker chamber rises, carrying out pressure release with, on the top board of the described casing on the top of described bus-bar room, be provided with the ventilation tower.

6. as claim 4 or 5 described metal closed type switch gears, it is characterized in that,

On the dividing plate of dividing described cable vault and described bus-bar room, be provided with the pressure release of when the internal pressure of described cable vault rises, carrying out pressure release with, on the top board of the described casing on the top of described bus-bar room, be provided with the ventilation tower.