JPH054709U - Kew vehicle and drawer type electric equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a cubicle and a drawer-type electric device that have reduced size and improved withstand voltage characteristics. [Structure] A cubicle 1 and a drawer-type electric device 2 for connecting a three-phase power source side main circuit conductor and a load-side main circuit conductor installed in the cubicle 1 and a lead-out type electric device 2 via a disconnecting terminal and a connecting terminal, respectively. And disconnecting terminal 1 on the power supply side
8a, 18b, 18c and load side disconnection terminals 19a, 19
b and 19c are arranged horizontally apart from each other, and the three-phase disconnection terminals on each of the power supply side and the load side are arranged vertically apart to form a cubicle. In addition, the drawer-type electric equipment to be housed is similarly constructed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is applied to a cubicle and a drawer-type electric device housed in this cubicle. In particular, the present invention relates to an arrangement configuration of disconnecting terminals and connecting terminals.

[0002]

[Prior art]

  Recently, cubicles installed in a limited space such as an electric room in a building are space-saving. It tends to be thin in terms of maintenance from the front and front. This kind thin type Since the ubicle can be maintained from the front, it can be installed close to the wall of the electrical room. There is an advantage that the inspection passage on the back side, which was required by conventional cubicles, is not required.

[0003]   On the other hand, dry type transformers are used for the transformer due to the peculiarity of installation in the building. Also, the transformer capacity may be relatively small, for example in the case of a 500 KVA transformer. Therefore, from the point of view of the transformer's production limit, a queue with a depth of 700 to 900 mm The transformer is housed and installed in the vehicle. And other drawer type electrics installed in parallel A cubic that contains equipment (for example, vacuum circuit breaker, vacuum switch, instrument transformer, etc.) The crew will also be formed and installed to the same size.

[0004]   An example of this type of conventional drawer type electric equipment will be described based on the vacuum switch shown in FIG. To do. 1 is a cubicle, and a plurality of device storage chambers 13 are vertically arranged by a middle frame 12. I have one. On the back side (right side in the figure) of the cubicle 1, the supporting insulators 14, 1 5, main circuit conductors 16 and 17 are provided. A disconnecting terminal is provided at the tip.

[0005]   2 is a combination type vacuum switch, which has wheels 21 at the bottom and can be pulled out freely. It is stored on the middle frame 12. 22 and 23 are the vacuum switch 2 and the main circuit conductor 16, It is a connection terminal connected to the disconnection terminal of 17. In the figure, 11 is the cubicle. It's a door.

[0006]   Next, FIG. 6 is a schematic view of the main circuit conductors 16 and 17 in the cubicle 1. Yes, because multiple drawer-type electric devices (vacuum switch 2) are stacked and stored, Insulated main circuit conductors 16a, 16b, 16c and 17a, 17b, 1 7c are arranged in a complicated manner. In the figure, 18a, 18b, 18c and 19a , 19b and 19c are disconnecting terminals for each phase (three phases) and are connected to the power source side (18a, 18b). , 18c) on the upper side and the load side (19a, 19b, 19c) on the lower side in the vertical direction. The phases are spaced apart from each other and are horizontally separated from each other. In the figure 3 is a current transformer.

[0007]

[Problems to be solved by the device]

  Disconnection terminal on the main circuit conductor side of a conventional cubicle ( The connection terminals are the main circuit conductors for each disconnection terminal on the power supply side and each disconnection terminal on the load side. It is arranged in the direction (horizontal direction) orthogonal to the direction (usually the extension direction, which is usually the vertical direction). Therefore, when multiple electric devices are stacked in multiple stages, the main circuit conductor (especially on the load side) ) Is complicated to install.

[0008]   In addition, space for arranging the main circuit conductor of the load is especially required between the stacked electrical devices. There is a limit to the vertical dimension of the cubicle because it is required, or There was a limit to the increase in the number of steps.

[0009]   The present invention solves these problems and further simplifies and downsizes the cubic system. The purpose of the present invention is to provide a drawer and a drawer type electric device.

[0010]

[Means for Solving the Problems]

  The present invention is a three-phase power supply side main circuit conductor and load side main circuit installed in a cubicle. A cubicle and a cubicle that connect the line conductor and the drawer-type electric device via disconnection terminals, respectively. And drawer type electric equipment,   a. The power supply side disconnection terminal and the load side disconnection terminal are provided separately in the horizontal direction, and The three-phase disconnection terminals on each power supply side and load side are arranged vertically and separated from each other. Make up the vehicle.

[0011]   b. Further, the power supply side connection terminal and the load side connection terminal are provided separately in the horizontal direction, In addition, the three-phase connection terminals on each power supply side and load side are vertically spaced and pulled. Configures a dispenser type electric device.

[0012] It is a thing.

[0013]   c. Draw-out type electric equipment is equipped with a vacuum interrupter and a fuse, and both are parallel. It is placed and wrapped by the insulation distance and fixed to the insulation frame. There is.

[0014]   d. The vacuum interrupter includes a metal shield surrounding the pair of electrodes and The metal shield is configured to have the same potential as the fuse.

[0015]   e. Furthermore, at least a part of the vacuum interrupter is surrounded by an insulating frame. It is what you make.

[0016]

[Action]

  Separate the power supply side disconnection terminal (connection terminal) and the load side disconnection terminal (connection terminal) in the horizontal direction. And the three-phase disconnection terminals on each power supply side and load side in the vertical direction. Since the cubicle (drawer type electric device) is configured by arranging it separately in the And the main circuit conductor on the load side can be easily connected and installed, and the cubicle can be reduced in the vertical direction. In addition, it is possible to reduce the size of the drawer type electric device itself and at the same time improve the withstand voltage characteristics. It is something.

[0017]

【Example】

  The present invention will be described in detail based on an embodiment shown in the drawings.

[0018]   It is to be noted that the components designated by the same reference numerals as those in FIGS. Detailed description thereof will be omitted.

[0019]   First, FIG. 1 shows a schematic view of the disconnection terminals and the main circuit conductor arrangement in the cubicle 1. It is a multi-drawer type electric device (vacuum switch 2) that is stacked and stored. Corresponding to, main circuit conductors 16a, 16b, 1 on the three-phase power source side, which are insulated, 6c is arranged on the left side in the drawing, and is provided so as to extend from the upper side to the lower side in the drawing. On the other hand, the main circuit conductors 17a, 17b, 17c on the three-phase load side are arranged on the right side in the figure. Further, it is provided so as to extend from the lower side to the upper side in the figure through the current transformer 3.

[0020]   Then, the tips of the main circuit conductors 16a, 16b, 16c on the power supply side are arranged in the vertical direction (in the figure). Disconnecting terminals 18 which are spaced apart from each other in the vertical direction and spaced apart from each other in the vertical direction. It is connected to a, 18b, and 18c. Similarly, the main circuit conductor 17a on the load side, The tips of 17b and 17c are vertically spaced (vertical direction in the drawing) and are separated from each other. It is connected to the disconnection terminals 19a, 19b, 19c which are spaced apart in the vertical direction. . The disconnection terminals 18a, 18b, 18c, 19a, 19b, 19c will be described later. As shown in FIG. 2, it is supported and fixed by supporting insulators 14 and 15.

[0021]   Therefore, it is easier to arrange the main circuit conductors on both the power supply side and the load side than in the past. Therefore, the number of wiring steps and the vertical space can be reduced. The main circuit conductor Since the bending is simple, it is possible to use an inexpensive rectangular conductor.

[0022]   Next, FIG. 2 to FIG. 4 show an example of the vacuum switch 2 which is an example of a drawer type electric device. This is an example. The vacuum switch 2 is a pole that is arranged vertically for three phases for the operation part 24. 20a, 20b, 20c are the main components.

[0023]   As shown in FIG. 3, a vacuum interrupter 4 and a fuse 5 are provided in each pole pillar so as to have an insulating frame. It is fixedly arranged in the dome 6. Further, in the operation section 24, an operation electromagnet 25 An interrupting spring (omitted) is arranged, and the vacuum interrupter 4 is connected via the link mechanism 26. Is configured to be opened and closed.

[0024]   22a, 22b, 22c, 23a, 23b and 23c are connection terminals, and are vacuum terminals. The interrupter 4 and the fuse 5, the disconnecting terminal 18a in the cubicle 1 described above, 18b, 18c, 19a, 19b, 19c are connected.

[0025]   By the way, as shown in FIG. 3, the width is reduced (the horizontal direction in FIG. 3 is about 500 mm. ), The vacuum interrupter 4 (length about 90 mm) and the fuse 5 (length (Approx. 250 mm) and when placed parallel to each other, there is a concern if both parts overlap There is a problem.

[0026]   a. The problem of the possibility of deterioration of withstand voltage characteristics of the vacuum interrupter 4,   b. The problem of the possibility of deterioration of withstand voltage characteristics between the two, Is the point.

[0027]   Therefore, as a result of the study, the inventors have constructed a vacuum interrupter 4 as shown in FIG. It has been found that it is sufficient to make it and store it in the insulating frame 6.

[0028]   That is, in FIG. 4, a pair of electrodes 42, 43 so that at least one electrode (electrode 43 in the embodiment) can be moved. The configured vacuum interrupter 4 is connected to the The shield 44 so that it has the same potential as that of the electrode 5 (in the embodiment, the same potential as the electrode 42). By arranging the pair of electrodes so as to surround them, the electrodes can be connected to the outside of the vacuum interrupter 4. Prevents the breakdown voltage characteristics of the vacuum interrupter 4 from decreasing due to the same internal potential. I found that I could stop it.

[0029]   Further, as shown in FIG. 4, the insulating frame 6 surrounds a part of the vacuum interrupter 4. It has been found that such arrangement improves the withstand voltage characteristic. In the experimental results If the fuse 5 is present, the withstand voltage characteristic is the same as the value of the vacuum interrupter 4 alone. If the fuse 5 is not present, the vacuum interrupter 4 unit A withstand voltage characteristic of 20% increase was obtained.

[0030]

[Effect of device]

  In the cubicle 1 and the drawer type electric device 2 of the present invention, the power source side disconnecting end The child (and the connection terminal) and the load-side disconnection terminal (connection terminal) are horizontally separated from each other. Provided, and the three-phase disconnection terminals on each power supply side and load side are vertically separated. Since the cubicle is configured by using, the main circuit conductors on the power supply side and the load side can be easily Can be connected and installed, and the cubicle can be downsized in the vertical direction.

[0031]   Further, the drawer-type electric device 2 housed in the cubicle 1 is a vacuum interrupter 4 And fuse 5 are placed, and both are placed in parallel and wrapped with an insulation distance. Since it is placed and fixed to the insulating frame 6, the width of the drawer type electric device 2 It is possible to reduce the size of the cubicle 1, and thus to reduce the width of the cubicle 1.

[0032]   Further, the vacuum interrupter 4 comprises a metal shield 44 surrounding the pair of electrodes. When the metal shield 44 and the fuse 5 have the same potential as the fuse 5, the withstand voltage characteristic is improved. You can get better. Furthermore, at least a part of the vacuum interrupter 4 is connected to the insulating frame 6 It is expected that further improvement of the withstand voltage characteristics can be expected by surrounding it with .

[0033]   Therefore, according to the present invention, the cubicle and the drawer type electric device can be downsized and the electric strength can be improved. A device having improved pressure characteristics can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic view of an arrangement of disconnecting terminals and main circuit conductors of a cubicle according to an embodiment of the present invention.

FIG. 2 is a side view of a drawer type electric device according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a detailed view of the vacuum interrupter portion of FIG.

FIG. 5 is a schematic side view of a conventional drawer-type electric device.

FIG. 6 is a schematic view of the layout of disconnecting terminals and main circuit conductors of a conventional cubicle.

[Explanation of symbols]

1 ... Cubicles, 16a, 16b, 16c ... Power supply side main circuit conductors, 17a, 17b, 17c ... Load side main circuit conductors, 18a, 18b, 18c ... Power supply side disconnection terminal, 19
a, 19b, 19c ... Load side disconnecting terminal, 2 ... Drawer type electric equipment, 22a, 22b, 22c, 23a, 23b, 2
3c ... Connection terminal, 4 ... Vacuum interrupter, 5 ... Fuse, 6 ... Insulating frame, 42, 43 ... Electrode, 44 ... Metal shield.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location H02B 13/02 7028-5G H02B 11/12 A 9059-5G 13/02 A

Claims (5)

[Scope of utility model registration request] 1. A cubicle in which a three-phase power supply side main circuit conductor and a load side main circuit conductor installed in a cubicle and a drawer-type electric device are connected via disconnection terminals, respectively, wherein a power supply side disconnection terminal and a load side disconnection are provided. A cubicle, characterized in that it is provided with a terminal spaced apart in the horizontal direction, and with three-phase disconnection terminals on each of the power supply side and the load side spaced apart in the vertical direction. 2. In a drawer-type electric device which is connected to a three-phase power supply side main circuit conductor and a load side main circuit conductor installed in a cubicle via connection terminals, respectively, the power supply side connection terminal and the load side connection terminal are connected. A drawer-type electric device, characterized in that it is provided separately in the horizontal direction, and three-phase connection terminals on each of the power supply side and the load side are provided separately in the vertical direction. 3. A vacuum switch which comprises a drawer type electric device including a vacuum interrupter and a fuse, both of which are arranged in parallel and lapped with an insulating distance therebetween and fixed to an insulating frame. The drawer-type electric device according to claim 2. 4. A drawer type electric device according to claim 2, wherein a metal shield surrounding the pair of electrodes is provided in the vacuum interrupter, and the metal shield is a vacuum switch having the same potential as the fuse. . 5. The drawer-type electric device according to claim 3, which is a vacuum switch in which at least a part of the vacuum interrupter is surrounded by an insulating frame.