JP5971924B2 - Switchgear - Google Patents

Description

  The present invention relates to a switch gear used in, for example, power receiving and distributing equipment.

  FIG. 7 is a side sectional view showing a conventional switchgear disclosed in, for example, Japanese Utility Model Laid-Open No. 2-139403, FIG. 6 is a front sectional view thereof, and FIG. 8 is a single-line connection diagram showing a device configuration.

  In each figure, 1 is a switchgear bus, 2 is a circuit breaker, 3 is a current transformer, 5 is a cable, 1A is a primary device, and 3A is a secondary device. In this device, a plurality of circuit breakers 2 are arranged in the width direction of the switchgear, and a switchgear that can be operated in the front and can be maintained on the front can be obtained by minimizing the depth of the switchgear.

Japanese Utility Model Publication No. 2-139403

  In the switchgear described in the above-mentioned conventional patent document 1, since the pull-in of the cable 5 is limited from the floor direction of the switchgear, the device connected to the cable 5 is a switchgear in a power distribution facility plan such as a building. It is optimal when placed on the lower floor, but when the equipment connected by the cable 5 is on the upper floor of the switchgear, a cable rack is provided on the upper part of the switchgear and the cable 5 is drawn from the top of the switchgear. A relatively simple construction method cannot be adopted.

  For this reason, a cable pit space is provided under the floor of the duct and the switchgear where the cable 5 from the upper floor passes through the switchgear installation room to the cable pit provided under the switchgear floor and the switchgear. In this case, the cable 5 is pulled in from the floor, and the length of the cable 5 increases, which is uneconomical.

  In addition, the space for construction of ducts and pits under the floor and the construction costs are more expensive than the installation of cable racks, which hinders the cost reduction of the entire power receiving and distribution equipment construction.

  In the case of the conventional switchgear, if it is more suitable for the whole facility to pull in the cable 5 from the ceiling (upper side in the figure) of the switchgear due to the layout plan of the entire power distribution facility, the width of the switchgear is reduced. Expand the casing of the circuit breaker to secure the cable 5 lead-in space, or increase the depth of the switchgear at the expense of front maintenance, and the ceiling in the space behind the bus 1 The switchgear has become larger, such as a structure that pulls in the cable from the part, and the design has been greatly different.

  For this reason, there are problems such as downsizing and obstructing the short delivery time. The small switchgear is suitable for shortening the delivery time because it has good front operation and front maintenance, regardless of the vertical direction of the cable 5 pull-in. It was a challenge to provide

  The present invention has been made in order to solve the above-described problems. The object of the present invention is to use the same housing and members and rearrange them so that the cable pull-in direction is the floor direction of the switchgear. It provides a compact switchgear that can be manufactured in a short delivery time, can be operated in the front, can be maintained in the front, and can be applied in any direction from the ceiling.

The switchgear according to the present invention includes a circuit breaker chamber unit that constitutes a circuit breaker chamber in which one circuit breaker is disposed, a busbar chamber that is disposed in a direction perpendicular to the circuit breaker chamber unit, and in which a busbar is disposed, A switchgear having a housing that is arranged in a direction perpendicular to the circuit breaker chamber unit and that includes a cable chamber in which cables are arranged, the circuit breaker chamber unit having an upper plate, a floor plate, and a back plate. The back plate is provided with terminals of an upper bushing and a lower bushing, the dimensions from the upper plate of the breaker chamber unit to the terminals of the upper bushing and the floor plate of the breaker chamber unit to the lower portion a size of up to the terminal of the bushing and the same dimensions, and replaceable positions of the said cable chamber and the busbar compartment arranged in a direction perpendicular to the breaker chamber unit It is intended.

  According to the switchgear according to the present invention, the front casing and the front maintenance can be adapted so that the cable pull-in direction can be adapted to the floor direction or the ceiling direction of the switchgear only by rearranging them using the same casing and members. It is possible to obtain a compact switchgear that can be manufactured with a short delivery time.

It is a cross-sectional side view which shows the switchgear concerning Embodiment 1 of this invention. It is a cross-sectional side view which shows the state which draws in a cable from a ceiling in the rearranged state in the switchgear concerning Embodiment 1 of this invention. It is a cross-sectional partial side view which shows the circuit breaker chamber in the switchgear concerning Embodiment 1 of this invention. It is a cross-sectional side view which shows the switchgear concerning Embodiment 2 of this invention. It is a cross-sectional side view which shows the switchgear concerning Embodiment 2 of this invention. It is a front view which shows the conventional switchgear. It is a cross-sectional side view which shows the conventional switchgear. It is a single wire connection diagram of the conventional switchgear.

Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 3. In the drawings, the same or equivalent members and parts will be described with the same reference numerals. 1 is a sectional side view showing a switchgear according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional side view showing a state in which the cable is drawn from the ceiling in the switched state in the switchgear according to Embodiment 1 of the present invention. FIG. 3 is a partial sectional side view showing a circuit breaker chamber in the switchgear according to Embodiment 1 of the present invention.

  The configuration will be described with reference to FIG. Reference numeral 101 denotes a bus arranged in the bus room 100, and 102 denotes a circuit breaker. In this case, it is a drawer type circuit breaker, and a state indicated by a solid line in the figure is a connection position. Reference numeral 102-1 denotes a state where the circuit breaker 102 is in the disconnection position, which is indicated by a broken line. 102a is an upper junction of the circuit breaker 102, 102b is a lower junction of the circuit breaker 102, 102-1a is an upper junction in a state where the circuit breaker 102 is in the disconnecting position, and 102-1b is a lower junction. Reference numeral 103 denotes a current transformer, and a through-type current transformer is shown in the figure. Reference numeral 105 denotes a cable arranged in the cable chamber 500, and shows a state where the cable is drawn from the floor of the switchgear. Reference numeral 107 denotes a switchgear housing, which is grounded metal.

  108 is a front door of the switchgear. Although details are not shown, for example, there are a hinge on the left side and a handle on the right side when viewed from the front, and this is used for switchgear installation, cable connection work and maintenance inspection inside the switchgear. Open and work.

  109 is a connection position of the circuit breaker 102, a connection conductor between terminals that is in electrical contact with the upper junction 102 a of the circuit breaker 102 from the bus 101, 110 is a connection position of the circuit breaker 102, and a lower junction of the circuit breaker 102 A connection conductor from a terminal that is energized to 102b to a terminal portion to which the cable 105 is connected is shown. Reference numeral 111 denotes a circuit breaker chamber unit constituting the circuit breaker chamber 200. Reference numeral 112 denotes a control equipment room. Reference numeral 113 denotes a ceiling of the housing 107, and 114 denotes a floor of the housing 107.

  FIG. 2 shows a configuration in which the switchgear according to the first embodiment is rearranged and a cable is pulled from the ceiling of the switchgear. The same reference numerals as those in FIG. 1 denote the same components or units. Reference numeral 115 denotes a ceiling of the casing 107, and 116 denotes a floor of the casing 107.

  FIG. 3 is a cross-sectional side view of the circuit breaker chamber unit 111 shown in the first embodiment. 111 a is a floor plate of the circuit breaker chamber unit 111, which also serves as a partition plate with the cable chamber 500. 111b is a back plate of the circuit breaker chamber unit 111, and supports and circuit breakers for the upper bushing 111c and the lower bushing 111d that form terminals to be electrically connected to the upper junction 102a and the lower junction 102b of the circuit breaker 102 at the connection position of the circuit breaker 102. This is a structure that also serves as a partition partition plate for the chamber 200, the cable chamber 500, and the busbar chamber 100. Reference numeral 111e denotes an upper plate of the circuit breaker chamber unit 111, which is a partition partition plate for the circuit breaker chamber 200 and the bus bar chamber 100. Reference numeral 111f denotes a partition plate, and the circuit breaker chamber 200 and the control device chamber when the circuit breaker 102 is in the connected position. 112 partition partitions are constructed.

  1 to 3, the dimension between the upper plate 111e of the circuit breaker chamber unit 111 and the terminal 111c1 of the upper bushing 111c is A, and the dimension between the floor plate 111a of the circuit breaker chamber unit 111 and the terminal 111d1 of the lower bushing 111d is B. A = B.

  The switch gear shown in FIG. 1 is used when the cable 105 is pulled in from the floor (lower side in FIG. 1) of the switch gear, and the position of the terminal 111c1 of the upper bushing 111c of the circuit breaker chamber unit 111 is changed to the switchgear housing. This is the position C from the ceiling 113 of the body 107.

  FIG. 2 shows the switchgear of FIG. 1 rotated upside down. However, the circuit breaker 102 which is a drawer type device cannot be used in reverse, so the circuit breaker chamber unit 111 is 1 is a switch gear incorporated in the same direction as FIG. 1 (not upside down). Further, the front door 108 and the devices in the control device room 112 are also in the same direction as FIG.

  In the switchgear shown in FIGS. 1 and 2, the circuit breaker chamber unit 111 of FIG. 3 is mounted so that the top and bottom are relatively reversed, but the upper plate 111e of the circuit breaker chamber unit 111 is connected to the terminal 111c1 of the upper bushing 111c. Since the dimension A between the floor board 111a and the terminal 111d1 of the lower bushing 111d is the same, even if the assembly other than the circuit breaker chamber unit 111 is turned upside down, the circuit breaker chamber unit 111 remains in the same state. Can be incorporated.

  Therefore, in FIG. 2, the height from the floor 116 of the switchgear casing 107 to the terminal 111d1 of the lower bushing 111d of the circuit breaker chamber unit 111 is C, which is the same as C in FIG.

  Further, although detailed illustrations are omitted, the casing 107 has the same circuit breaker chamber unit 111 and the same front door 108 even when the circuit breaker chamber unit 111 and the front door 108 are turned upside down relatively. Is formed to be attachable.

  In addition, the control equipment and wiring in the control equipment room 112 are not only in a case configuration in which the same equipment can be mounted even when the control equipment and the wiring are turned upside down relative to the case 107, but the control equipment and wiring are modularized or cassetteized. It is better to keep it. In this case, the front door and the control device set are configured such that the front door hinge and door latch are attached to both the front door and the control device so that they can be handled in the same direction even when the case is turned upside down. Even if the control device set is modularized or unitized and the casing is reversed, it is preferable that visibility, operability, and inspection are in the same direction.

  According to the first embodiment of the present invention, the following effects can be obtained. There is an effect that a small switchgear that can be easily manufactured by front panel operation and front surface maintenance that can be easily manufactured only by rearranging the same member and the same unit without changing the design depending on the drawing direction of the cable 105 is obtained.

  For this reason, even if the layout plan for the entire power distribution facility and the cable route between the transformer and load equipment, etc. and the switchgear cannot be determined, the switchgear parts can be manufactured in advance, so that it is possible to make preparations and reduce the production cost. This has the effect of reducing costs and shortening delivery times.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIGS. 4 and 5. In the drawings, the same or corresponding members and parts will be described with the same reference numerals. 4 is a sectional side view showing a switchgear according to Embodiment 2 of the present invention. 5 is a cross-sectional side view showing a switchgear according to Embodiment 2 of the present invention.

  In FIG. 4, reference numeral 117 denotes a switchgear housing having a minimum height dimension capable of mounting a set of main circuit functional devices such as the busbar 101, the circuit breaker 102, the current transformer 103, the connection conductor 109, and the connection conductor 110. Is the body. Reference numeral 118 denotes a cable made of a ground metal to be attached as necessary for securing the terminal processing dimensions of the lead-in cable and ensuring the operability and visibility of the operation equipment and instruments (not shown) mounted on the circuit breaker 102 or the front door 119. The processing box 118a is a removable cover. 120 is a partition between the bus bar room 100 and the control equipment room 112, and 121 is a protective cover for the cable room 500.

  In the switchgear according to the second embodiment of the present invention, the switchgear casing 117 includes a set of main circuit functional devices of the switchgear, such as the bus 101, the circuit breaker 102, the current transformer 103, the connection conductor 9, and the connection conductor 10. A cable processing box 118 made of a ground metal is used to increase the switchgear height as required, and is configured with a minimum height dimension (about 1900 mm or less) that can be mounted.

  In FIG. 4, the dimension A from the upper plate 111e of the circuit breaker chamber unit 111 to the terminal 111c1 of the upper bushing 111c and the dimension B from the floor plate 111a of the circuit breaker chamber unit 111 to the terminal 111d1 of the lower bushing 11d are as described above. As described in the first embodiment, the dimensions are the same and A = B.

  Further, in the second embodiment, the dimension C from the ceiling 113 of the casing 117 to the terminal 111c1 of the upper bushing 11c of the circuit breaker chamber unit 111 and the terminal of the lower bushing 11d of the circuit breaker chamber unit 111 from the floor 114 of the casing 117. The dimension up to 111d1 is the same C. By making the C dimension the same, for example, the partition plate 120 and the protective cover 121 can be shared by the same component, for example, in addition to the effects of the first embodiment described above, the effect of further sharing the component can be obtained. In addition, a switchgear that further improves production efficiency such as sharing of a switchgear assembly jig can be obtained.

  The cable processing box 118 made of ground metal installed on the lower side of the floor 114 of the casing 117 has an upper surface for penetration of the cable 105 and has an opening larger than the ground insulation distance, and an opening for cable construction work on the front side. In addition, a watertight structural member 122 that secures the watertightness of the cable penetration part such as the cable gland is provided at the bottom, and the cover 118a is watertightly attached after the installation of the switchgear and the cable drawing operation is completed. Even if the cable processing box 118 made of a ground metal is immersed below the height, the soundness of the function of the switch gear can be ensured. Needless to say, if the terminal processing of the cable 105 is of the outdoor specification, the watertight structure of the cable processing box 118 and the cover 118a made of a ground metal is unnecessary.

  Moreover, since the cable processing box 118 having a watertight structure is provided on the lower side of the floor 114 of the casing 117, the soundness of the function of the switchgear can be ensured even in the case of a flooding accident of a certain height into the electrical room. available.

  FIG. 5 shows a case where the casing 117 according to the second embodiment is turned upside down so that the cable 105 is pulled from the ceiling 115 of the casing 117. A specific reassignment strategy is as described in the first embodiment.

  In FIG. 5, the cable processing box 123 made of a ground metal is provided on the upper side of the ceiling 115 of the casing 117 to be provided as necessary at the terminal treatment section of the cable 10. 124 is provided. Of course, this may be a screwed cover.

  If the height of the casing 117 needs to be raised for the purpose of improving the operability and visibility of the circuit breaker 102 or the door surface mounting instrument, measuring instrument, or flooding measures in the electrical room, A box or a frame may be provided.

  In addition to the effects of the switchgear shown in the first embodiment, the switchgear shown in the second embodiment increases the sharing of parts and further improves the manufacturing efficiency. Since the height of the mounted casing portion is reduced, and it is possible to carry the vehicle in a passenger elevator and a person passage, there is an effect that a dedicated carry-in / out passage and a large cargo elevator are not required.

  It should be noted that within the scope of the present invention, the embodiments can be freely combined, or the embodiments can be appropriately modified or omitted.

  The present invention is suitable for realizing a small switchgear that can be easily manufactured by changing the design of the same member and the same unit without changing the design depending on the direction in which the cable is pulled in, and that can be easily maintained and maintained in the front.

100 Busbar Room 101 Busbar 102 Breaker 102-1 Breaker Disconnection Position 102a Upper Junction 102b Lower Junction 105 Cable 107 Housing 111 Breaker Room Unit 111a Floor Plate 111b Back Plate 111c Upper Bushing 111c1 Terminal 111d Lower Bushing 111d1 Terminal 111e Upper Board 113 Ceiling 114 Floor 115 Ceiling 116 Floor 117 Case 118 Cable processing box 123 Cable processing box

Claims (5)

A circuit breaker chamber unit constituting a circuit breaker chamber in which one circuit breaker is disposed, a bus line chamber disposed in a direction perpendicular to the circuit breaker chamber unit, and disposed in a direction perpendicular to the circuit breaker chamber unit. A switchgear having a casing configured by a cable chamber arranged in a direction and a cable chamber, wherein the breaker chamber unit has an upper plate, a floor plate, and a back plate, and the back plate has Terminals of the upper bushing and the lower bushing are arranged, the dimension from the upper plate of the breaker chamber unit to the terminal of the upper bushing, and the dimension from the floor plate of the breaker chamber unit to the terminal of the lower bushing The switchgear has the same dimensions, and the positions of the bus bar room and the cable room arranged in a direction perpendicular to the circuit breaker room unit can be exchanged.   2. The switchgear according to claim 1, wherein a dimension from a ceiling of the casing to a terminal of the upper bushing is the same as a dimension from a floor of the casing to a terminal of the lower bushing.   The bus bar chamber is disposed on the upper side of the circuit breaker chamber unit, the cable chamber is disposed on the lower side of the circuit breaker chamber unit, and a cable processing box is provided on the lower side of the housing. The switchgear according to claim 1 or 2.   The bus bar room is arranged on the lower side of the circuit breaker room unit, the cable room is arranged on the upper side of the circuit breaker room unit, and a cable processing box is provided on the ceiling upper side of the casing. The switchgear according to claim 1 or 2.   The switchgear according to claim 3 or 4, wherein the cable processing box has a watertight structure.

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