JP3095130U - Low voltage branch terminal box - Google Patents

Abstract

(57) [Problem] To provide a general-purpose low-voltage branch terminal box that can be coupled to a terminal plate even when a secondary lead wire of a transformer is relatively short. SOLUTION: In a low-voltage branch terminal box 1 for connecting a secondary-side lead wire of a transformer installed in a supply transformer room and a cable on a customer side, a low-voltage branch terminal box 1 is provided on a front surface of an insulating terminal block 2. A conductive terminal plate 3 attached to connect the secondary lead wire and the cable; and a terminal cover detachably attached to the terminal block 2 and covering the upper surface, the front surface, and both side surfaces of the terminal plate 3. An opening 5 through which the secondary lead wire can be inserted is formed on the upper surface of the terminal cover 4 with the terminal cover 4 attached to the terminal block 2.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention is a transformer for supply when supplying power to, for example, an apartment or a condominium. To connect the secondary side lead wire of the transformer installed in the equipment room and the customer side cable The present invention relates to a low voltage branch terminal box used for.

[0002]

[Prior art]

  As a conventional low-voltage branch terminal box of this type, for example, one shown in FIG. 6 is known. Has been. This low-voltage branch terminal box 51 has a U-shaped cross section on the front surface of an insulating terminal block 52. The electrically conductive terminal plate 53 of FIG. And both side surfaces are made of a transparent insulating member screwed to the upper end surface of the terminal block 52. It is covered with a terminal cover 54.

[0003]   This low-voltage branch terminal box 51 is installed in the supply transformer room where the transformer 61 is installed. And attach it to the frame 63 corresponding to each secondary side lead wire 62 of the transformer 61. Then, the corresponding secondary side lead wire 62 is opposed to the terminal plate 53 via the crimp terminal 64. Connect it to any side and crimp the corresponding cable 65 on the customer side as well. The terminal 66 is connected to any opposing side surface of the terminal plate 53, so that the terminal To electrically connect the secondary side lead wire 62 and the cable 65 via the plate 53. is doing. In addition, in FIG. 6, the transformer side is provided on both opposite sides of the terminal plate 53 having a concave cross section. Is a maximum of 4 circuits, and a total of 8 circuits can be connected including the customer side. A box 51 is shown.

[0004]

[Problems to be solved by the device]

  In the conventional low-voltage branch terminal box 51 described above, the bottom surface of the terminal cover 54 is covered by the terminal cover 54. Only the secondary lead wire 62 and cable 65 are When connecting to the subsidiary plate 53, with the terminal cover 54 removed, the secondary side Insert the wire 62 and the cable 65 almost vertically from the bottom side and connect them to the terminal board 53. After that, the terminal cover 54 is attached.

[0005]   By the way, the transformer 61 installed in the supply transformer room has conventionally been a lightning protection type pole-mounted transformer. The pressure device is reused, but recently the three-phase four-wire one-tank transformer is also used. Is starting to appear.

[0006]   However, the three-phase, four-wire one-tank transformer is more secondary than the lightning-resistant pole pole transformer. Since the side lead wire is often short, the installation position of the transformer 61 and the low voltage branch terminal box 51 Depending on the positional relationship, the secondary side lead wire 62 may be almost removed from the bottom side of the low voltage branch terminal box 51. In some cases, it cannot be inserted vertically and cannot be connected, and the three-phase four-wire one-tank transformer cannot be used. is there.

[0007]   Therefore, an object of the present invention made in view of the above point is to provide a secondary side transformer of a transformer. A low-voltage branch terminal box with excellent versatility that can be connected to a terminal board even if the lead wire is relatively short. To provide.

[0008]

[Means for Solving the Problems]

  The invention according to claim 1 which achieves the above object, is a transformer installed in a transformer room for supply. Low voltage branch terminal box for connecting the secondary side lead wire of the power supply equipment and the customer side cable At   Installed on the front surface of the insulating terminal block, the secondary side lead wire and the cable Conductive terminal plate for connecting the   Removably attached to the terminal block, the upper surface side, the front surface side and both sides of the terminal plate. It has a terminal cover that covers the side surface,   On the upper surface of the terminal cover, with the terminal cover attached to the terminal block, It is characterized in that an opening is formed through which the secondary side lead wire can be inserted.

[0009]   According to the invention of claim 1, since the opening is formed on the upper surface of the terminal cover, If the secondary side lead wire of the pressure device is short, connect the secondary side lead from the top side of the low voltage branch terminal box. It is possible to insert a wire and connect it to the terminal board. Therefore, as a transformer , Even when using a three-phase four-wire one-tank transformer with a relatively short secondary side lead wire It is possible to cope with this and improve versatility.

[0010]   The invention according to claim 2 is the low-voltage branch terminal box according to claim 1, wherein the terminal is provided. A slidable lid for opening and closing the opening is provided on the upper surface of the cover. To do.

[0011]   According to the invention of claim 2, when the opening is not used, that is, the secondary side lead When inserting the cable from the bottom side and connecting it to the terminal board, cover the opening with a lid. As a result, it is possible to improve safety and prevent dust and dirt from entering and adhering. It becomes possible.

[0012]   The invention according to claim 3 provides the low-voltage branch terminal box according to claim 1 or 2, The terminal plate has a U-shaped cross section, and the secondary side leads are provided on opposite side surfaces thereof. The wire and the cable can be connected, and both sides of the terminal board can be supported. The opening is formed on the upper surface of the terminal cover.

[0013]   According to the invention of claim 3, the number of branches can be increased and , The secondary side lead wire to be connected to the opposite side surfaces of the terminal board, for example, on one side surface side Is inserted from the top surface side and the other side surface side is inserted from the bottom surface side to join. It can be arbitrarily selected according to the length of the line, and the usability can be further improved.

[0014]

[Embodiment of device]

  An embodiment of a low-voltage branch terminal box according to the present invention will be described below with reference to the drawings explain.

[0015]   1 to 5 are partially cutaway views of a low voltage branch terminal box according to an embodiment of the present invention. 2 is a plan view, FIG. 3 is a sectional view taken along the line AA of FIG. 1, and FIG. FIG. 5 is a plan view with the lid removed, and FIG. 5 is a perspective view of the lid of the terminal cover.

[0016]   The low-voltage branch terminal box 1 of this embodiment is similar to the low-voltage branch terminal box 51 shown in FIG. In addition, the conductive terminal plate 3 having a U-shaped cross section is screwed to the front surface of the insulating terminal block 2. On both sides of the terminal board 3 facing each other, attach the secondary side lead wire (power supply side) of the transformer. Maximum of 4 circuits, 8 minutes including customer side cables (branch side) It is a multi-purpose type, and the upper surface side, front surface side, and both side surfaces of the terminal board 3 are the upper ends of the terminal block 2. It is covered with a terminal cover 4 made of a transparent insulating member screwed to the surface. Note that In the present embodiment, the low voltage branch terminal box 1 is installed in the central portion of the terminal board 3. A power supply terminal 7 for the supply transformer room is provided.

[0017]   In the present embodiment, as shown in FIG. 4, the terminal plate 3 is cut off on the upper surface of the terminal cover 4. Notch-shaped openings 5, 5 are formed in each part corresponding to both sides of the U-shape In addition, a transparent insulating lid 6 as shown in FIG. 5 is provided to open and close each opening 5. Can be slid onto the top surface of the terminal cover 4 and removable from the terminal cover 4. Set up.

[0018]   According to the low voltage branch terminal box 1 of the present embodiment, for example, a three-phase four-wire one-tank transformer The secondary side lead wire is relatively short like a container, and is inserted from the bottom side of the low voltage branch terminal box 1. If it cannot be connected to the terminal board 3 by inserting the secondary side lead wire from the top side, The cover 6 of the terminal cover 4 which is connected to the plate 3 and then corresponds to the connected secondary side lead wire The terminal cover 4 so that the secondary side lead wire is inserted through the opening 5. It can be used by screwing it to the terminal block 2.

[0019]   Also, the secondary side lead wire is relatively long, such as a lightning-proof pole transformer, If it can be inserted from the bottom side of the terminal box 1 and connected to the terminal board 3, as in the conventional case Insert the secondary side lead wire from the bottom side and connect it to the terminal board 3, or Insert the secondary side lead wire from the top side and connect it to the terminal board 3, then It can be used by screwing the child cover 4 to the terminal block 2. In addition, When inserting the secondary side lead wire from the bottom side and connecting it to the terminal board 3, the terminal cover The opening 5 of 4 is closed with a lid 6.

[0020]   Thus, according to the low voltage branch terminal box 1 of the present embodiment, the secondary side as a transformer Of course, when using a lightning-proof pole transformer, for example, if the lead wire is relatively long, When the secondary side lead wire is relatively short, for example, when using a three-phase four-wire one-tank transformer Since it can also be applied to, the versatility can be improved.

[0021]   It should be noted that the present invention is not limited to the above-described embodiment, and various modifications are possible. Or it can be changed. For example, in the above embodiment, the opening of the terminal cover 4 is Although the lid 5 can be opened and closed by the lid 6, such a lid 6 can be omitted. Well Further, the terminal plate 3 is not limited to have a concave cross section, but may have any shape according to the number of branch terminals. it can. Further, the terminal cover 4 and the lid 6 should be formed of an opaque insulating member. You can also

[0022]

[Effect of device]

  As described above, according to the present invention, since the opening is formed on the upper surface of the terminal cover, If the secondary side lead wire of the transformer is short, insert the secondary side lead wire from the top side. It can be connected to a terminal board, and versatility can be improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a low-voltage branch terminal box according to an embodiment of the present invention.

FIG. 2 is likewise a plan view.

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

FIG. 4 is a plan view of the terminal cover shown in FIG. 1 with a lid removed.

5 is a perspective view of a lid of the terminal cover shown in FIG. 1. FIG.

FIG. 6 is a diagram showing a usage mode of a conventional low-voltage branch terminal box.

[Explanation of symbols]

1 Low voltage branch terminal box 2 terminal blocks 3 terminal board 4 terminal cover 5 openings 6 lid 7 Power supply terminal for transformer room

Claims (3)

[Scope of utility model registration request] 1. A low-voltage branch terminal box for connecting a secondary-side lead wire of a transformer installed in a supply transformer room and a customer-side cable, which is mounted on the front surface of an insulating terminal block. A conductive terminal plate for connecting the secondary side lead wire and the cable, and a terminal cover detachably attached to the terminal block and covering the upper surface side, front surface side and both side surface sides of the terminal plate. A low-voltage branch terminal box having an opening formed on the upper surface of the terminal cover, through which the secondary side lead wire can be inserted while the terminal cover is mounted on the terminal block. 2. The low-voltage branch terminal box according to claim 1, wherein a slidable lid that opens and closes the opening is provided on an upper surface of the terminal cover. 3. The terminal plate has a U-shaped cross section so that the secondary side lead wire and the cable can be connected to opposite side surfaces thereof, respectively, and the terminal cover corresponds to both side surfaces of the terminal plate. The low-voltage branch terminal box according to claim 1 or 2, wherein the opening is formed on the upper surface of the.